This is an automated email from the ASF dual-hosted git repository.

bdeggleston pushed a commit to branch trunk
in repository https://gitbox.apache.org/repos/asf/cassandra.git


The following commit(s) were added to refs/heads/trunk by this push:
     new aa762c6  Support building Cassandra with JDK 11
aa762c6 is described below

commit aa762c6d5253e0cc2947d3bf2b6149197e106036
Author: Blake Eggleston <bdeggles...@gmail.com>
AuthorDate: Tue Mar 26 11:18:00 2019 -0700

    Support building Cassandra with JDK 11
    
    Patch by Blake Eggleston; Reviewed by Dinesh Joshi and Sam Tunnicliffe for 
CASSANDRA-15108
---
 .circleci/config-2_1.yml                           | 243 +++---
 .circleci/config.yml                               | 890 +++++----------------
 .circleci/config.yml.HIGHRES                       | 890 +++++----------------
 .circleci/config.yml.LOWRES                        | 890 +++++----------------
 CHANGES.txt                                        |   1 +
 build.xml                                          | 200 +++--
 conf/jvm11-clients.options                         |  10 +-
 conf/jvm11-server.options                          |  10 +-
 lib/asm-6.2.jar                                    | Bin 111214 -> 0 bytes
 lib/asm-7.1.jar                                    | Bin 0 -> 114762 bytes
 .../cql3/functions/UDFByteCodeVerifier.java        |   2 +-
 .../apache/cassandra/metrics/StreamingMetrics.java |  18 +-
 12 files changed, 909 insertions(+), 2245 deletions(-)

diff --git a/.circleci/config-2_1.yml b/.circleci/config-2_1.yml
index a4cf55f..d0bd003 100644
--- a/.circleci/config-2_1.yml
+++ b/.circleci/config-2_1.yml
@@ -1,8 +1,6 @@
 version: 2.1
 
 default_env_vars: &default_env_vars
-    JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     ANT_HOME: /usr/share/ant
     LANG: en_US.UTF-8
     KEEP_TEST_DIR: true
@@ -36,98 +34,133 @@ j11_par_executor: &j11_par_executor
     #exec_resource_class: xlarge
   parallelism: 4
 
-with_dtests_jobs: &with_dtest_jobs
+j8_with_dtests_jobs: &j8_with_dtests_jobs
+  jobs:
+    - j8_build
+    # Java 8 unit tests will be run automatically
+    - j8_unit_tests:
+        requires:
+          - j8_build
+    - j8_jvm_dtests:
+        requires:
+          - j8_build
+    # Java 11 unit tests (on request, currently not working)
+    - start_j11_unit_tests:
+        type: approval
+        requires:
+          - j8_build
+    - j11_unit_tests:
+        requires:
+          - start_j11_unit_tests
+    # specialized unit tests (all run on request using Java 8)
+    - start_utests_long:
+        type: approval
+        requires:
+          - j8_build
+    - utests_long:
+        requires:
+          - start_utests_long
+    - start_utests_compression:
+        type: approval
+        requires:
+          - j8_build
+    - utests_compression:
+        requires:
+          - start_utests_compression
+    - start_utests_stress:
+        type: approval
+        requires:
+          - j8_build
+    - utests_stress:
+        requires:
+          - start_utests_stress
+    - start_utests_fqltool:
+        type: approval
+        requires:
+          - j8_build
+    - utests_fqltool:
+        requires:
+          - start_utests_fqltool
+    # Java 8 dtests (on request)
+    - start_j8_dtests:
+        type: approval
+        requires:
+          - j8_build
+    - j8_dtests-with-vnodes:
+        requires:
+          - start_j8_dtests
+    - j8_dtests-no-vnodes:
+        requires:
+          - start_j8_dtests
+    # Java 11 dtests (on request)
+    - start_j11_dtests:
+        type: approval
+        requires:
+          - j8_build
+    - j11_dtests-with-vnodes:
+        requires:
+        - start_j11_dtests
+    - j11_dtests-no-vnodes:
+        requires:
+        - start_j11_dtests
+    # Java 8 upgrade tests
+    - start_upgrade_tests:
+        type: approval
+        requires:
+          - j8_build
+    - j8_upgradetests-no-vnodes:
+        requires:
+          - start_upgrade_tests
+
+j11_with_dtests_jobs: &j11_with_dtests_jobs
+  jobs:
+    - j11_build
+    # Java 11 unit tests (on request, currently not working)
+    - start_j11_unit_tests:
+        type: approval
+        requires:
+          - j11_build
+    - j11_unit_tests:
+        requires:
+          - start_j11_unit_tests
+    # Java 11 dtests (on request)
+    - start_j11_dtests:
+        type: approval
+        requires:
+          - j11_build
+    - j11_dtests-with-vnodes:
+        requires:
+          - start_j11_dtests
+    - j11_dtests-no-vnodes:
+        requires:
+          - start_j11_dtests
+
+j8_with_dtest_jobs_only: &j8_with_dtest_jobs_only
         jobs:
-            - build
-            # Java 8 unit tests will be run automatically
-            - j8_unit_tests:
-                requires:
-                  - build
-            - j8_jvm_dtests:
-                requires:
-                  - build
-            # Java 11 unit tests (on request, currently not working)
-            - start_j11_unit_tests:
-                type: approval
-                requires:
-                  - build
-            - j11_unit_tests:
-                requires:
-                  - start_j11_unit_tests
-            # specialized unit tests (all run on request using Java 8)
-            - start_utests_long:
-                type: approval
-                requires:
-                  - build
-            - utests_long:
-                requires:
-                  - start_utests_long
-            - start_utests_compression:
-                type: approval
-                requires:
-                  - build
-            - utests_compression:
-                requires:
-                  - start_utests_compression
-            - start_utests_stress:
-                type: approval
-                requires:
-                  - build
-            - utests_stress:
-                requires:
-                  - start_utests_stress
-            - start_utests_fqltool:
-                type: approval
-                requires:
-                  - build
-            - utests_fqltool:
-                requires:
-                  - start_utests_fqltool
-            # Java 8 dtests (on request)
-            - start_j8_dtests:
-                type: approval
-                requires:
-                  - build
+            - j8_build
             - j8_dtests-with-vnodes:
-                requires:
-                  - start_j8_dtests
+                  requires:
+                      - j8_build
             - j8_dtests-no-vnodes:
-                requires:
-                  - start_j8_dtests
-            # Java 11 dtests (on request)
-            - start_j11_dtests:
-                type: approval
-                requires:
-                  - build
-            - j11_dtests-with-vnodes:
-                requires:
-                - start_j11_dtests
-            - j11_dtests-no-vnodes:
-                requires:
-                - start_j11_dtests
-            # Java 8 upgrade tests
-            - start_upgrade_tests:
-                type: approval
-                requires:
-                  - build
-            - j8_upgradetests-no-vnodes:
-                requires:
-                  - start_upgrade_tests
+                  requires:
+                      - j8_build
 
-with_dtest_jobs_only: &with_dtest_jobs_only
+j11_with_dtest_jobs_only: &j11_with_dtest_jobs_only
         jobs:
             - build
-            - j8_dtests-with-vnodes:
-                  requires:
-                      - build
-            - j8_dtests-no-vnodes:
-                  requires:
-                      - build
+            - j11-with-vnodes:
+                requires:
+                  - j11_build
+            - j11_dtests-no-vnodes:
+                requires:
+                  - j11_build
 
 workflows:
     version: 2
-    build_and_run_tests: *with_dtest_jobs
-    #build_and_run_tests: *with_dtest_jobs_only
+    java8_build_and_run_tests: *j8_with_dtests_jobs
+#    java8_build_and_run_tests: *j8_with_dtest_jobs_only
+    java11_build_and_run_tests: *j11_with_dtests_jobs
+#    java11_build_and_run_tests: *j11_with_dtest_jobs_only
 
 executors:
   java8-executor:
@@ -159,21 +192,29 @@ executors:
       <<: *default_env_vars
       JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
       JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+      CASSANDRA_USE_JDK11: true
+
+build_common: &build_common
+  parallelism: 1 # This job doesn't benefit from parallelism
+  steps:
+    - log_environment
+    - clone_cassandra
+    - build_cassandra
+    - run_eclipse_warnings
+    - persist_to_workspace:
+        root: /home/cassandra
+        paths:
+          - cassandra
+          - .m2
 
 jobs:
-  build:
+  j8_build:
+    executor: java8-executor
+    <<: *build_common
+
+  j11_build:
     executor: java11-executor
-    parallelism: 1 # This job doesn't benefit from parallelism
-    steps:
-      - log_environment
-      - clone_cassandra
-      - build_cassandra
-      - run_eclipse_warnings
-      - persist_to_workspace:
-            root: /home/cassandra
-            paths:
-                - cassandra
-                - .m2
+    <<: *build_common
 
   j8_unit_tests:
     <<: *j8_par_executor
@@ -359,7 +400,7 @@ commands:
           cd ~/cassandra
           # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
           for x in $(seq 1 3); do
-              ${ANT_HOME}/bin/ant clean jar
+              ${ANT_HOME}/bin/ant clean realclean jar
               RETURN="$?"
               if [ "${RETURN}" -eq "0" ]; then
                   break
@@ -414,13 +455,11 @@ commands:
     steps:
     - run:
         name: Run Unit Tests (<<parameters.target>>)
-        # Please note that we run `clean` and therefore rebuild the project, 
as we can't run tests on Java 8 in case
-        # based on Java 11 builds.
         command: |
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean <<parameters.target>>
+          ant <<parameters.target>>
         no_output_timeout: <<parameters.no_output_timeout>>
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -442,8 +481,6 @@ commands:
     steps:
     - run:
         name: Run Unit Tests (<<parameters.target>>)
-        # Please note that we run `clean` and therefore rebuild the project, 
as we can't run tests on Java 8 in case
-        # based on Java 11 builds.
         command: |
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
diff --git a/.circleci/config.yml b/.circleci/config.yml
index 1b1952d..27fda51 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -68,90 +68,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-    - ANT_HOME: /usr/share/ant
-    - LANG: en_US.UTF-8
-    - KEEP_TEST_DIR: true
-    - DEFAULT_DIR: /home/cassandra/cassandra-dtest
-    - PYTHONIOENCODING: utf-8
-    - PYTHONUNBUFFERED: true
-    - CASS_DRIVER_NO_EXTENSIONS: true
-    - CASS_DRIVER_NO_CYTHON: true
-    - CASSANDRA_SKIP_SYNC: true
-    - DTEST_REPO: git://github.com/apache/cassandra-dtest.git
-    - DTEST_BRANCH: master
-    - CCM_MAX_HEAP_SIZE: 1024M
-    - CCM_HEAP_NEWSIZE: 256M
-    - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-    - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-  build:
-    docker:
-    - image: spod/cassandra-testing-ubuntu1810-java11:20181210
-    resource_class: medium
-    working_directory: ~/
-    shell: /bin/bash -eo pipefail -l
-    parallelism: 1
-    steps:
-    - run:
-        name: Log Environment Information
-        command: |
-          echo '*** id ***'
-          id
-          echo '*** cat /proc/cpuinfo ***'
-          cat /proc/cpuinfo
-          echo '*** free -m ***'
-          free -m
-          echo '*** df -m ***'
-          df -m
-          echo '*** ifconfig -a ***'
-          ifconfig -a
-          echo '*** uname -a ***'
-          uname -a
-          echo '*** mount ***'
-          mount
-          echo '*** env ***'
-          env
-          echo '*** java ***'
-          which java
-          java -version
-    - run:
-        name: Clone Cassandra Repository (via git)
-        command: |
-          git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
-    - run:
-        name: Build Cassandra
-        command: |
-          export PATH=$JAVA_HOME/bin:$PATH
-          cd ~/cassandra
-          # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
-          for x in $(seq 1 3); do
-              ${ANT_HOME}/bin/ant clean jar
-              RETURN="$?"
-              if [ "${RETURN}" -eq "0" ]; then
-                  break
-              fi
-          done
-          # Exit, if we didn't build successfully
-          if [ "${RETURN}" -ne "0" ]; then
-              echo "Build failed with exit code: ${RETURN}"
-              exit ${RETURN}
-          fi
-        no_output_timeout: 15m
-    - run:
-        name: Run eclipse-warnings
-        command: |
-          export PATH=$JAVA_HOME/bin:$PATH
-          cd ~/cassandra
-          ant eclipse-warnings
-    - persist_to_workspace:
-        root: /home/cassandra
-        paths:
-        - cassandra
-        - .m2
-    environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -167,6 +83,7 @@ jobs:
     - CCM_HEAP_NEWSIZE: 256M
     - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   j11_dtests-with-vnodes:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11:20181210
@@ -221,7 +138,7 @@ jobs:
           \ executed on every circle container\n# so the goal here is to get 
the circleci\
           \ script to return the tests *this* container will run\n# which we 
do via\
           \ the `circleci` cli tool.\n\ncd cassandra-dtest\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           echo \"***Collected DTests (j11_with_vnodes)***\"\nset -eo pipefail 
&& ./run_dtests.py\
           \ --use-vnodes --skip-resource-intensive-tests 
--dtest-print-tests-only\
           \ 
--dtest-print-tests-output=/tmp/all_dtest_tests_j11_with_vnodes_raw 
--cassandra-dir=../cassandra\n\
@@ -237,7 +154,7 @@ jobs:
         no_output_timeout: 15m
         command: "echo \"cat 
/tmp/split_dtest_tests_j11_with_vnodes_final.txt\"\n\
           cat /tmp/split_dtest_tests_j11_with_vnodes_final.txt\n\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           java -version\ncd ~/cassandra-dtest\nmkdir -p /tmp/dtest\n\necho 
\"env:\
           \ $(env)\"\necho \"** done env\"\nmkdir -p /tmp/results/dtests\n# we 
need\
           \ the \"set -o pipefail\" here so that the exit code that circleci 
will\
@@ -256,8 +173,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j11_with_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -273,6 +188,7 @@ jobs:
     - CCM_HEAP_NEWSIZE: 256M
     - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   j8_dtests-no-vnodes:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
@@ -341,8 +257,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j8_without_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -441,8 +355,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j8_upgradetests_without_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -474,7 +386,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean stress-test
+          ant stress-test
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -485,8 +397,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -570,8 +480,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -587,6 +495,87 @@ jobs:
     - CCM_HEAP_NEWSIZE: 256M
     - JAVA_HOME: /usr/lib/jvm/java-8-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
+  j11_build:
+    docker:
+    - image: spod/cassandra-testing-ubuntu1810-java11:20181210
+    resource_class: medium
+    working_directory: ~/
+    shell: /bin/bash -eo pipefail -l
+    parallelism: 1
+    steps:
+    - run:
+        name: Log Environment Information
+        command: |
+          echo '*** id ***'
+          id
+          echo '*** cat /proc/cpuinfo ***'
+          cat /proc/cpuinfo
+          echo '*** free -m ***'
+          free -m
+          echo '*** df -m ***'
+          df -m
+          echo '*** ifconfig -a ***'
+          ifconfig -a
+          echo '*** uname -a ***'
+          uname -a
+          echo '*** mount ***'
+          mount
+          echo '*** env ***'
+          env
+          echo '*** java ***'
+          which java
+          java -version
+    - run:
+        name: Clone Cassandra Repository (via git)
+        command: |
+          git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
+    - run:
+        name: Build Cassandra
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
+          for x in $(seq 1 3); do
+              ${ANT_HOME}/bin/ant clean realclean jar
+              RETURN="$?"
+              if [ "${RETURN}" -eq "0" ]; then
+                  break
+              fi
+          done
+          # Exit, if we didn't build successfully
+          if [ "${RETURN}" -ne "0" ]; then
+              echo "Build failed with exit code: ${RETURN}"
+              exit ${RETURN}
+          fi
+        no_output_timeout: 15m
+    - run:
+        name: Run eclipse-warnings
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          ant eclipse-warnings
+    - persist_to_workspace:
+        root: /home/cassandra
+        paths:
+        - cassandra
+        - .m2
+    environment:
+    - ANT_HOME: /usr/share/ant
+    - LANG: en_US.UTF-8
+    - KEEP_TEST_DIR: true
+    - DEFAULT_DIR: /home/cassandra/cassandra-dtest
+    - PYTHONIOENCODING: utf-8
+    - PYTHONUNBUFFERED: true
+    - CASS_DRIVER_NO_EXTENSIONS: true
+    - CASS_DRIVER_NO_CYTHON: true
+    - CASSANDRA_SKIP_SYNC: true
+    - DTEST_REPO: git://github.com/apache/cassandra-dtest.git
+    - DTEST_BRANCH: master
+    - CCM_MAX_HEAP_SIZE: 1024M
+    - CCM_HEAP_NEWSIZE: 256M
+    - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   j8_dtests-with-vnodes:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
@@ -654,8 +643,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j8_with_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -687,7 +674,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean test-jvm-dtest-forking
+          ant test-jvm-dtest-forking
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -698,8 +685,86 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - ANT_HOME: /usr/share/ant
+    - LANG: en_US.UTF-8
+    - KEEP_TEST_DIR: true
+    - DEFAULT_DIR: /home/cassandra/cassandra-dtest
+    - PYTHONIOENCODING: utf-8
+    - PYTHONUNBUFFERED: true
+    - CASS_DRIVER_NO_EXTENSIONS: true
+    - CASS_DRIVER_NO_CYTHON: true
+    - CASSANDRA_SKIP_SYNC: true
+    - DTEST_REPO: git://github.com/apache/cassandra-dtest.git
+    - DTEST_BRANCH: master
+    - CCM_MAX_HEAP_SIZE: 1024M
+    - CCM_HEAP_NEWSIZE: 256M
+    - JAVA_HOME: /usr/lib/jvm/java-8-openjdk-amd64
+    - JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
+  j8_build:
+    docker:
+    - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
+    resource_class: medium
+    working_directory: ~/
+    shell: /bin/bash -eo pipefail -l
+    parallelism: 1
+    steps:
+    - run:
+        name: Log Environment Information
+        command: |
+          echo '*** id ***'
+          id
+          echo '*** cat /proc/cpuinfo ***'
+          cat /proc/cpuinfo
+          echo '*** free -m ***'
+          free -m
+          echo '*** df -m ***'
+          df -m
+          echo '*** ifconfig -a ***'
+          ifconfig -a
+          echo '*** uname -a ***'
+          uname -a
+          echo '*** mount ***'
+          mount
+          echo '*** env ***'
+          env
+          echo '*** java ***'
+          which java
+          java -version
+    - run:
+        name: Clone Cassandra Repository (via git)
+        command: |
+          git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
+    - run:
+        name: Build Cassandra
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
+          for x in $(seq 1 3); do
+              ${ANT_HOME}/bin/ant clean realclean jar
+              RETURN="$?"
+              if [ "${RETURN}" -eq "0" ]; then
+                  break
+              fi
+          done
+          # Exit, if we didn't build successfully
+          if [ "${RETURN}" -ne "0" ]; then
+              echo "Build failed with exit code: ${RETURN}"
+              exit ${RETURN}
+          fi
+        no_output_timeout: 15m
+    - run:
+        name: Run eclipse-warnings
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          ant eclipse-warnings
+    - persist_to_workspace:
+        root: /home/cassandra
+        paths:
+        - cassandra
+        - .m2
+    environment:
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -731,7 +796,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean long-test
+          ant long-test
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -742,8 +807,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -775,7 +838,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean fqltool-test
+          ant fqltool-test
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -786,8 +849,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -857,7 +918,7 @@ jobs:
           \ executed on every circle container\n# so the goal here is to get 
the circleci\
           \ script to return the tests *this* container will run\n# which we 
do via\
           \ the `circleci` cli tool.\n\ncd cassandra-dtest\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           echo \"***Collected DTests (j11_without_vnodes)***\"\nset -eo 
pipefail &&\
           \ ./run_dtests.py --skip-resource-intensive-tests 
--dtest-print-tests-only\
           \ 
--dtest-print-tests-output=/tmp/all_dtest_tests_j11_without_vnodes_raw\
@@ -874,7 +935,7 @@ jobs:
         no_output_timeout: 15m
         command: "echo \"cat 
/tmp/split_dtest_tests_j11_without_vnodes_final.txt\"\
           \ncat /tmp/split_dtest_tests_j11_without_vnodes_final.txt\n\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           java -version\ncd ~/cassandra-dtest\nmkdir -p /tmp/dtest\n\necho 
\"env:\
           \ $(env)\"\necho \"** done env\"\nmkdir -p /tmp/results/dtests\n# we 
need\
           \ the \"set -o pipefail\" here so that the exit code that circleci 
will\
@@ -893,8 +954,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j11_without_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -910,6 +969,7 @@ jobs:
     - CCM_HEAP_NEWSIZE: 256M
     - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   utests_compression:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
@@ -978,8 +1038,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -997,54 +1055,54 @@ jobs:
     - JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
 workflows:
   version: 2
-  build_and_run_tests:
+  java8_build_and_run_tests:
     jobs:
-    - build
+    - j8_build
     - j8_unit_tests:
         requires:
-        - build
+        - j8_build
     - j8_jvm_dtests:
         requires:
-        - build
+        - j8_build
     - start_j11_unit_tests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j11_unit_tests:
         requires:
         - start_j11_unit_tests
     - start_utests_long:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_long:
         requires:
         - start_utests_long
     - start_utests_compression:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_compression:
         requires:
         - start_utests_compression
     - start_utests_stress:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_stress:
         requires:
         - start_utests_stress
     - start_utests_fqltool:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_fqltool:
         requires:
         - start_utests_fqltool
     - start_j8_dtests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j8_dtests-with-vnodes:
         requires:
         - start_j8_dtests
@@ -1054,7 +1112,7 @@ workflows:
     - start_j11_dtests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j11_dtests-with-vnodes:
         requires:
         - start_j11_dtests
@@ -1064,567 +1122,27 @@ workflows:
     - start_upgrade_tests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j8_upgradetests-no-vnodes:
         requires:
         - start_upgrade_tests
-
-# Original config.yml file:
-# version: 2.1
-# 
-# default_env_vars: &default_env_vars
-#     JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-#     JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-#     ANT_HOME: /usr/share/ant
-#     LANG: en_US.UTF-8
-#     KEEP_TEST_DIR: true
-#     DEFAULT_DIR: /home/cassandra/cassandra-dtest
-#     PYTHONIOENCODING: utf-8
-#     PYTHONUNBUFFERED: true
-#     CASS_DRIVER_NO_EXTENSIONS: true
-#     CASS_DRIVER_NO_CYTHON: true
-#     #Skip all syncing to disk to avoid performance issues in flaky CI 
environments
-#     CASSANDRA_SKIP_SYNC: true
-#     DTEST_REPO: git://github.com/apache/cassandra-dtest.git
-#     DTEST_BRANCH: master
-#     CCM_MAX_HEAP_SIZE: 1024M
-#     CCM_HEAP_NEWSIZE: 256M
-# 
-# j8_par_executor: &j8_par_executor
-#   executor:
-#     name: java8-executor
-#     #exec_resource_class: xlarge
-#   parallelism: 4
-# 
-# j8_seq_executor: &j8_seq_executor
-#   executor:
-#     name: java8-executor
-#     #exec_resource_class: xlarge
-#   parallelism: 1 # sequential, single container tests: no parallelism 
benefits
-# 
-# j11_par_executor: &j11_par_executor
-#   executor:
-#     name: java11-executor
-#     #exec_resource_class: xlarge
-#   parallelism: 4
-# 
-# with_dtests_jobs: &with_dtest_jobs
-#         jobs:
-#             - build
-#             # Java 8 unit tests will be run automatically
-#             - j8_unit_tests:
-#                 requires:
-#                   - build
-#             - j8_jvm_dtests:
-#                 requires:
-#                   - build
-#             # Java 11 unit tests (on request, currently not working)
-#             - start_j11_unit_tests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j11_unit_tests:
-#                 requires:
-#                   - start_j11_unit_tests
-#             # specialized unit tests (all run on request using Java 8)
-#             - start_utests_long:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_long:
-#                 requires:
-#                   - start_utests_long
-#             - start_utests_compression:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_compression:
-#                 requires:
-#                   - start_utests_compression
-#             - start_utests_stress:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_stress:
-#                 requires:
-#                   - start_utests_stress
-#             - start_utests_fqltool:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_fqltool:
-#                 requires:
-#                   - start_utests_fqltool
-#             # Java 8 dtests (on request)
-#             - start_j8_dtests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j8_dtests-with-vnodes:
-#                 requires:
-#                   - start_j8_dtests
-#             - j8_dtests-no-vnodes:
-#                 requires:
-#                   - start_j8_dtests
-#             # Java 11 dtests (on request)
-#             - start_j11_dtests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j11_dtests-with-vnodes:
-#                 requires:
-#                 - start_j11_dtests
-#             - j11_dtests-no-vnodes:
-#                 requires:
-#                 - start_j11_dtests
-#             # Java 8 upgrade tests
-#             - start_upgrade_tests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j8_upgradetests-no-vnodes:
-#                 requires:
-#                   - start_upgrade_tests
-# 
-# with_dtest_jobs_only: &with_dtest_jobs_only
-#         jobs:
-#             - build
-#             - j8_dtests-with-vnodes:
-#                   requires:
-#                       - build
-#             - j8_dtests-no-vnodes:
-#                   requires:
-#                       - build
-# 
-# workflows:
-#     version: 2
-#     build_and_run_tests: *with_dtest_jobs
-#     #build_and_run_tests: *with_dtest_jobs_only
-# 
-# executors:
-#   java8-executor:
-#     parameters:
-#       exec_resource_class:
-#         type: string
-#         default: medium
-#     docker:
-#       - image: 
spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
-#     resource_class: << parameters.exec_resource_class >>
-#     working_directory: ~/
-#     shell: /bin/bash -eo pipefail -l
-#     environment:
-#       <<: *default_env_vars
-#       JAVA_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-#       JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-# 
-#   java11-executor:
-#     parameters:
-#       exec_resource_class:
-#         type: string
-#         default: medium
-#     docker:
-#     - image: spod/cassandra-testing-ubuntu1810-java11:20181210
-#     resource_class: << parameters.exec_resource_class >>
-#     working_directory: ~/
-#     shell: /bin/bash -eo pipefail -l
-#     environment:
-#       <<: *default_env_vars
-#       JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-#       JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-# 
-# jobs:
-#   build:
-#     executor: java11-executor
-#     parallelism: 1 # This job doesn't benefit from parallelism
-#     steps:
-#       - log_environment
-#       - clone_cassandra
-#       - build_cassandra
-#       - run_eclipse_warnings
-#       - persist_to_workspace:
-#             root: /home/cassandra
-#             paths:
-#                 - cassandra
-#                 - .m2
-# 
-#   j8_unit_tests:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - create_junit_containers
-#       - log_environment
-#       - run_parallel_junit_tests
-# 
-#   j8_jvm_dtests:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: test-jvm-dtest-forking
-# 
-#   j11_unit_tests:
-#     <<: *j11_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - create_junit_containers
-#       - log_environment
-#       - run_parallel_junit_tests
-# 
-#   utests_long:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: long-test
-# 
-#   utests_compression:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - create_junit_containers
-#       - log_environment
-#       - run_parallel_junit_tests:
-#           target: testclasslist-compression
-# 
-#   utests_stress:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: stress-test
-# 
-#   utests_fqltool:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: fqltool-test
-# 
-#   j8_dtests-with-vnodes:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - clone_dtest
-#       - create_venv
-#       - create_dtest_containers:
-#           file_tag: j8_with_vnodes
-#           run_dtests_extra_args: '--use-vnodes 
--skip-resource-intensive-tests'
-#       - run_dtests:
-#           file_tag: j8_with_vnodes
-#           pytest_extra_args: '--use-vnodes --num-tokens=32 
--skip-resource-intensive-tests'
-# 
-#   j11_dtests-with-vnodes:
-#     <<: *j11_par_executor
-#     steps:
-#     - attach_workspace:
-#         at: /home/cassandra
-#     - log_environment
-#     - clone_dtest
-#     - create_venv
-#     - create_dtest_containers:
-#         file_tag: j11_with_vnodes
-#         run_dtests_extra_args: '--use-vnodes --skip-resource-intensive-tests'
-#     - run_dtests:
-#         file_tag: j11_with_vnodes
-#         pytest_extra_args: '--use-vnodes --num-tokens=32 
--skip-resource-intensive-tests'
-# 
-#   j8_dtests-no-vnodes:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - clone_dtest
-#       - create_venv
-#       - create_dtest_containers:
-#           file_tag: j8_without_vnodes
-#           run_dtests_extra_args: '--skip-resource-intensive-tests'
-#       - run_dtests:
-#           file_tag: j8_without_vnodes
-#           pytest_extra_args: '--skip-resource-intensive-tests'
-# 
-#   j11_dtests-no-vnodes:
-#     <<: *j11_par_executor
-#     steps:
-#     - attach_workspace:
-#         at: /home/cassandra
-#     - log_environment
-#     - clone_dtest
-#     - create_venv
-#     - create_dtest_containers:
-#         file_tag: j11_without_vnodes
-#         run_dtests_extra_args: '--skip-resource-intensive-tests'
-#     - run_dtests:
-#         file_tag: j11_without_vnodes
-#         pytest_extra_args: '--skip-resource-intensive-tests'
-# 
-#   j8_upgradetests-no-vnodes:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - clone_dtest
-#       - create_venv
-#       - create_dtest_containers:
-#           file_tag: j8_upgradetests_without_vnodes
-#           run_dtests_extra_args: '--execute-upgrade-tests'
-#           extra_env_args: 'RUN_STATIC_UPGRADE_MATRIX=true'
-#           tests_filter_pattern: '^upgrade_tests'
-#       - run_dtests:
-#           file_tag: j8_upgradetests_without_vnodes
-#           extra_env_args: 'RUN_STATIC_UPGRADE_MATRIX=true'
-#           pytest_extra_args: '--execute-upgrade-tests'
-# 
-# commands:
-#   log_environment:
-#     steps:
-#     - run:
-#         name: Log Environment Information
-#         command: |
-#           echo '*** id ***'
-#           id
-#           echo '*** cat /proc/cpuinfo ***'
-#           cat /proc/cpuinfo
-#           echo '*** free -m ***'
-#           free -m
-#           echo '*** df -m ***'
-#           df -m
-#           echo '*** ifconfig -a ***'
-#           ifconfig -a
-#           echo '*** uname -a ***'
-#           uname -a
-#           echo '*** mount ***'
-#           mount
-#           echo '*** env ***'
-#           env
-#           echo '*** java ***'
-#           which java
-#           java -version
-# 
-#   clone_cassandra:
-#     steps:
-#     - run:
-#         name: Clone Cassandra Repository (via git)
-#         command: |
-#           git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
-# 
-#   clone_dtest:
-#     steps:
-#     - run:
-#         name: Clone Cassandra dtest Repository (via git)
-#         command: |
-#           git clone --single-branch --branch $DTEST_BRANCH --depth 1 
$DTEST_REPO ~/cassandra-dtest
-# 
-#   build_cassandra:
-#     steps:
-#     - run:
-#         name: Build Cassandra
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           cd ~/cassandra
-#           # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
-#           for x in $(seq 1 3); do
-#               ${ANT_HOME}/bin/ant clean jar
-#               RETURN=\"$?\"
-#               if [ \"${RETURN}\" -eq \"0\" ]; then
-#                   break
-#               fi
-#           done
-#           # Exit, if we didn't build successfully
-#           if [ \"${RETURN}\" -ne \"0\" ]; then
-#               echo \"Build failed with exit code: ${RETURN}\"
-#               exit ${RETURN}
-#           fi
-#         no_output_timeout: 15m
-# 
-#   run_eclipse_warnings:
-#     steps:
-#     - run:
-#         name: Run eclipse-warnings
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           cd ~/cassandra
-#           ant eclipse-warnings
-# 
-#   create_junit_containers:
-#     steps:
-#     - run:
-#         name: Determine Unit Tests to Run
-#         command: |
-#           # reminder: this code (along with all the steps) is independently 
executed on every circle container
-#           # so the goal here is to get the circleci script to return the 
tests *this* container will run
-#           # which we do via the `circleci` cli tool.
-# 
-#           rm -fr ~/cassandra-dtest/upgrade_tests
-#           echo \"***java tests***\"
-# 
-#           # get all of our unit test filenames
-#           set -eo pipefail && circleci tests glob 
\"$HOME/cassandra/test/unit/**/*.java\" > /tmp/all_java_unit_tests.txt
-# 
-#           # split up the unit tests into groups based on the number of 
containers we have
-#           set -eo pipefail && circleci tests split --split-by=timings 
--timings-type=filename --index=${CIRCLE_NODE_INDEX} 
--total=${CIRCLE_NODE_TOTAL} /tmp/all_java_unit_tests.txt > 
/tmp/java_tests_${CIRCLE_NODE_INDEX}.txt
-#           set -eo pipefail && cat /tmp/java_tests_${CIRCLE_NODE_INDEX}.txt | 
cut -c 37-1000000 | grep \"Test\\.java$\" > 
/tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt
-#           echo \"** /tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt\"
-#           cat /tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt
-# 
-#         no_output_timeout: 15m
-# 
-#   run_junit_tests:
-#     parameters:
-#       target:
-#         type: string
-#       no_output_timeout:
-#         type: string
-#         default: 15m
-#     steps:
-#     - run:
-#         name: Run Unit Tests (<<parameters.target>>)
-#         # Please note that we run `clean` and therefore rebuild the project, 
as we can't run tests on Java 8 in case
-#         # based on Java 11 builds.
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           time mv ~/cassandra /tmp
-#           cd /tmp/cassandra
-#           ant clean <<parameters.target>>
-#         no_output_timeout: <<parameters.no_output_timeout>>
-#     - store_test_results:
-#         path: /tmp/cassandra/build/test/output/
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/output
-#         destination: junitxml
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/logs
-#         destination: logs
-# 
-#   run_parallel_junit_tests:
-#     parameters:
-#       target:
-#         type: string
-#         default: testclasslist
-#       no_output_timeout:
-#         type: string
-#         default: 15m
-#     steps:
-#     - run:
-#         name: Run Unit Tests (<<parameters.target>>)
-#         # Please note that we run `clean` and therefore rebuild the project, 
as we can't run tests on Java 8 in case
-#         # based on Java 11 builds.
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           time mv ~/cassandra /tmp
-#           cd /tmp/cassandra
-#           ant <<parameters.target>> 
-Dtest.classlistfile=/tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt  
-Dtest.classlistprefix=unit
-#         no_output_timeout: <<parameters.no_output_timeout>>
-#     - store_test_results:
-#         path: /tmp/cassandra/build/test/output/
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/output
-#         destination: junitxml
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/logs
-#         destination: logs
-# 
-#   create_venv:
-#     steps:
-#     - run:
-#         name: Configure virtualenv and python Dependencies
-#         command: |
-#           # note, this should be super quick as all dependencies should be 
pre-installed in the docker image
-#           # if additional dependencies were added to requirmeents.txt and 
the docker image hasn't been updated
-#           # we'd have to install it here at runtime -- which will make 
things slow, so do yourself a favor and
-#           # rebuild the docker image! (it automatically pulls the latest 
requirements.txt on build)
-#           source ~/env/bin/activate
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           pip3 install --upgrade -r ~/cassandra-dtest/requirements.txt
-#           pip3 freeze
-# 
-#   create_dtest_containers:
-#     parameters:
-#       file_tag:
-#         type: string
-#       run_dtests_extra_args:
-#         type: string
-#         default: ''
-#       extra_env_args:
-#         type: string
-#         default: ''
-#       tests_filter_pattern:
-#         type: string
-#         default: ''
-#     steps:
-#     - run:
-#         name: Determine Tests to Run (<<parameters.file_tag>>)
-#         no_output_timeout: 5m
-#         command: |
-#           # reminder: this code (along with all the steps) is independently 
executed on every circle container
-#           # so the goal here is to get the circleci script to return the 
tests *this* container will run
-#           # which we do via the `circleci` cli tool.
-# 
-#           cd cassandra-dtest
-#           source ~/env/bin/activate
-#           export PATH=$JAVA_HOME/bin:$PATH
-# 
-#           if [ -n '<<parameters.extra_env_args>>' ]; then
-#             export <<parameters.extra_env_args>>
-#           fi
-# 
-#           echo \"***Collected DTests (<<parameters.file_tag>>)***\"
-#           set -eo pipefail && ./run_dtests.py 
<<parameters.run_dtests_extra_args>> --dtest-print-tests-only 
--dtest-print-tests-output=/tmp/all_dtest_tests_<<parameters.file_tag>>_raw 
--cassandra-dir=../cassandra
-#           if [ -z '<<parameters.tests_filter_pattern>>' ]; then
-#             mv /tmp/all_dtest_tests_<<parameters.file_tag>>_raw 
/tmp/all_dtest_tests_<<parameters.file_tag>>
-#           else
-#             grep -e '<<parameters.tests_filter_pattern>>' 
/tmp/all_dtest_tests_<<parameters.file_tag>>_raw > 
/tmp/all_dtest_tests_<<parameters.file_tag>> || { echo \"Filter did not match 
any tests! Exiting build.\"; exit 0; }
-#           fi
-#           set -eo pipefail && circleci tests split --split-by=timings 
--timings-type=classname /tmp/all_dtest_tests_<<parameters.file_tag>> > 
/tmp/split_dtest_tests_<<parameters.file_tag>>.txt
-#           cat /tmp/split_dtest_tests_<<parameters.file_tag>>.txt | tr '\\n' 
' ' > /tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt
-#           cat /tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt
-# 
-#   run_dtests:
-#     parameters:
-#       file_tag:
-#         type: string
-#       pytest_extra_args:
-#         type: string
-#         default: ''
-#       extra_env_args:
-#         type: string
-#         default: ''
-#     steps:
-#       - run:
-#           name: Run dtests (<<parameters.file_tag>>)
-#           no_output_timeout: 15m
-#           command: |
-#             echo \"cat 
/tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt\"
-#             cat /tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt
-# 
-#             source ~/env/bin/activate
-#             export PATH=$JAVA_HOME/bin:$PATH
-#             if [ -n '<<parameters.extra_env_args>>' ]; then
-#               export <<parameters.extra_env_args>>
-#             fi
-# 
-#             java -version
-#             cd ~/cassandra-dtest
-#             mkdir -p /tmp/dtest
-# 
-#             echo \"env: $(env)\"
-#             echo \"** done env\"
-#             mkdir -p /tmp/results/dtests
-#             # we need the \"set -o pipefail\" here so that the exit code 
that circleci will actually use is from pytest and not the exit code from tee
-#             export SPLIT_TESTS=`cat 
/tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt`
-#             set -o pipefail && cd ~/cassandra-dtest && pytest 
<<parameters.pytest_extra_args>> --log-level=\"INFO\" 
--junit-xml=/tmp/results/dtests/pytest_result_<<parameters.file_tag>>.xml -s 
--cassandra-dir=/home/cassandra/cassandra --keep-test-dir $SPLIT_TESTS 2>&1 | 
tee /tmp/dtest/stdout.txt
-#       - store_test_results:
-#           path: /tmp/results
-#       - store_artifacts:
-#           path: /tmp/dtest
-#           destination: dtest_<<parameters.file_tag>>
-#       - store_artifacts:
-#           path: ~/cassandra-dtest/logs
-#           destination: dtest_<<parameters.file_tag>>_logs
\ No newline at end of file
+  java11_build_and_run_tests:
+    jobs:
+    - j11_build
+    - start_j11_unit_tests:
+        type: approval
+        requires:
+        - j11_build
+    - j11_unit_tests:
+        requires:
+        - start_j11_unit_tests
+    - start_j11_dtests:
+        type: approval
+        requires:
+        - j11_build
+    - j11_dtests-with-vnodes:
+        requires:
+        - start_j11_dtests
+    - j11_dtests-no-vnodes:
+        requires:
+        - start_j11_dtests
diff --git a/.circleci/config.yml.HIGHRES b/.circleci/config.yml.HIGHRES
index 84efce7..8ac50c9 100644
--- a/.circleci/config.yml.HIGHRES
+++ b/.circleci/config.yml.HIGHRES
@@ -68,90 +68,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-    - ANT_HOME: /usr/share/ant
-    - LANG: en_US.UTF-8
-    - KEEP_TEST_DIR: true
-    - DEFAULT_DIR: /home/cassandra/cassandra-dtest
-    - PYTHONIOENCODING: utf-8
-    - PYTHONUNBUFFERED: true
-    - CASS_DRIVER_NO_EXTENSIONS: true
-    - CASS_DRIVER_NO_CYTHON: true
-    - CASSANDRA_SKIP_SYNC: true
-    - DTEST_REPO: git://github.com/apache/cassandra-dtest.git
-    - DTEST_BRANCH: master
-    - CCM_MAX_HEAP_SIZE: 2048M
-    - CCM_HEAP_NEWSIZE: 512M
-    - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-    - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-  build:
-    docker:
-    - image: spod/cassandra-testing-ubuntu1810-java11:20181210
-    resource_class: medium
-    working_directory: ~/
-    shell: /bin/bash -eo pipefail -l
-    parallelism: 1
-    steps:
-    - run:
-        name: Log Environment Information
-        command: |
-          echo '*** id ***'
-          id
-          echo '*** cat /proc/cpuinfo ***'
-          cat /proc/cpuinfo
-          echo '*** free -m ***'
-          free -m
-          echo '*** df -m ***'
-          df -m
-          echo '*** ifconfig -a ***'
-          ifconfig -a
-          echo '*** uname -a ***'
-          uname -a
-          echo '*** mount ***'
-          mount
-          echo '*** env ***'
-          env
-          echo '*** java ***'
-          which java
-          java -version
-    - run:
-        name: Clone Cassandra Repository (via git)
-        command: |
-          git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
-    - run:
-        name: Build Cassandra
-        command: |
-          export PATH=$JAVA_HOME/bin:$PATH
-          cd ~/cassandra
-          # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
-          for x in $(seq 1 3); do
-              ${ANT_HOME}/bin/ant clean jar
-              RETURN="$?"
-              if [ "${RETURN}" -eq "0" ]; then
-                  break
-              fi
-          done
-          # Exit, if we didn't build successfully
-          if [ "${RETURN}" -ne "0" ]; then
-              echo "Build failed with exit code: ${RETURN}"
-              exit ${RETURN}
-          fi
-        no_output_timeout: 15m
-    - run:
-        name: Run eclipse-warnings
-        command: |
-          export PATH=$JAVA_HOME/bin:$PATH
-          cd ~/cassandra
-          ant eclipse-warnings
-    - persist_to_workspace:
-        root: /home/cassandra
-        paths:
-        - cassandra
-        - .m2
-    environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -167,6 +83,7 @@ jobs:
     - CCM_HEAP_NEWSIZE: 512M
     - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   j11_dtests-with-vnodes:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11:20181210
@@ -221,7 +138,7 @@ jobs:
           \ executed on every circle container\n# so the goal here is to get 
the circleci\
           \ script to return the tests *this* container will run\n# which we 
do via\
           \ the `circleci` cli tool.\n\ncd cassandra-dtest\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           echo \"***Collected DTests (j11_with_vnodes)***\"\nset -eo pipefail 
&& ./run_dtests.py\
           \ --use-vnodes --skip-resource-intensive-tests 
--dtest-print-tests-only\
           \ 
--dtest-print-tests-output=/tmp/all_dtest_tests_j11_with_vnodes_raw 
--cassandra-dir=../cassandra\n\
@@ -237,7 +154,7 @@ jobs:
         no_output_timeout: 15m
         command: "echo \"cat 
/tmp/split_dtest_tests_j11_with_vnodes_final.txt\"\n\
           cat /tmp/split_dtest_tests_j11_with_vnodes_final.txt\n\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           java -version\ncd ~/cassandra-dtest\nmkdir -p /tmp/dtest\n\necho 
\"env:\
           \ $(env)\"\necho \"** done env\"\nmkdir -p /tmp/results/dtests\n# we 
need\
           \ the \"set -o pipefail\" here so that the exit code that circleci 
will\
@@ -256,8 +173,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j11_with_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -273,6 +188,7 @@ jobs:
     - CCM_HEAP_NEWSIZE: 512M
     - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   j8_dtests-no-vnodes:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
@@ -341,8 +257,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j8_without_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -441,8 +355,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j8_upgradetests_without_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -474,7 +386,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean stress-test
+          ant stress-test
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -485,8 +397,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -570,8 +480,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -587,6 +495,87 @@ jobs:
     - CCM_HEAP_NEWSIZE: 512M
     - JAVA_HOME: /usr/lib/jvm/java-8-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
+  j11_build:
+    docker:
+    - image: spod/cassandra-testing-ubuntu1810-java11:20181210
+    resource_class: medium
+    working_directory: ~/
+    shell: /bin/bash -eo pipefail -l
+    parallelism: 1
+    steps:
+    - run:
+        name: Log Environment Information
+        command: |
+          echo '*** id ***'
+          id
+          echo '*** cat /proc/cpuinfo ***'
+          cat /proc/cpuinfo
+          echo '*** free -m ***'
+          free -m
+          echo '*** df -m ***'
+          df -m
+          echo '*** ifconfig -a ***'
+          ifconfig -a
+          echo '*** uname -a ***'
+          uname -a
+          echo '*** mount ***'
+          mount
+          echo '*** env ***'
+          env
+          echo '*** java ***'
+          which java
+          java -version
+    - run:
+        name: Clone Cassandra Repository (via git)
+        command: |
+          git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
+    - run:
+        name: Build Cassandra
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
+          for x in $(seq 1 3); do
+              ${ANT_HOME}/bin/ant clean realclean jar
+              RETURN="$?"
+              if [ "${RETURN}" -eq "0" ]; then
+                  break
+              fi
+          done
+          # Exit, if we didn't build successfully
+          if [ "${RETURN}" -ne "0" ]; then
+              echo "Build failed with exit code: ${RETURN}"
+              exit ${RETURN}
+          fi
+        no_output_timeout: 15m
+    - run:
+        name: Run eclipse-warnings
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          ant eclipse-warnings
+    - persist_to_workspace:
+        root: /home/cassandra
+        paths:
+        - cassandra
+        - .m2
+    environment:
+    - ANT_HOME: /usr/share/ant
+    - LANG: en_US.UTF-8
+    - KEEP_TEST_DIR: true
+    - DEFAULT_DIR: /home/cassandra/cassandra-dtest
+    - PYTHONIOENCODING: utf-8
+    - PYTHONUNBUFFERED: true
+    - CASS_DRIVER_NO_EXTENSIONS: true
+    - CASS_DRIVER_NO_CYTHON: true
+    - CASSANDRA_SKIP_SYNC: true
+    - DTEST_REPO: git://github.com/apache/cassandra-dtest.git
+    - DTEST_BRANCH: master
+    - CCM_MAX_HEAP_SIZE: 2048M
+    - CCM_HEAP_NEWSIZE: 512M
+    - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   j8_dtests-with-vnodes:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
@@ -654,8 +643,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j8_with_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -687,7 +674,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean test-jvm-dtest-forking
+          ant test-jvm-dtest-forking
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -698,8 +685,86 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - ANT_HOME: /usr/share/ant
+    - LANG: en_US.UTF-8
+    - KEEP_TEST_DIR: true
+    - DEFAULT_DIR: /home/cassandra/cassandra-dtest
+    - PYTHONIOENCODING: utf-8
+    - PYTHONUNBUFFERED: true
+    - CASS_DRIVER_NO_EXTENSIONS: true
+    - CASS_DRIVER_NO_CYTHON: true
+    - CASSANDRA_SKIP_SYNC: true
+    - DTEST_REPO: git://github.com/apache/cassandra-dtest.git
+    - DTEST_BRANCH: master
+    - CCM_MAX_HEAP_SIZE: 2048M
+    - CCM_HEAP_NEWSIZE: 512M
+    - JAVA_HOME: /usr/lib/jvm/java-8-openjdk-amd64
+    - JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
+  j8_build:
+    docker:
+    - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
+    resource_class: medium
+    working_directory: ~/
+    shell: /bin/bash -eo pipefail -l
+    parallelism: 1
+    steps:
+    - run:
+        name: Log Environment Information
+        command: |
+          echo '*** id ***'
+          id
+          echo '*** cat /proc/cpuinfo ***'
+          cat /proc/cpuinfo
+          echo '*** free -m ***'
+          free -m
+          echo '*** df -m ***'
+          df -m
+          echo '*** ifconfig -a ***'
+          ifconfig -a
+          echo '*** uname -a ***'
+          uname -a
+          echo '*** mount ***'
+          mount
+          echo '*** env ***'
+          env
+          echo '*** java ***'
+          which java
+          java -version
+    - run:
+        name: Clone Cassandra Repository (via git)
+        command: |
+          git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
+    - run:
+        name: Build Cassandra
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
+          for x in $(seq 1 3); do
+              ${ANT_HOME}/bin/ant clean realclean jar
+              RETURN="$?"
+              if [ "${RETURN}" -eq "0" ]; then
+                  break
+              fi
+          done
+          # Exit, if we didn't build successfully
+          if [ "${RETURN}" -ne "0" ]; then
+              echo "Build failed with exit code: ${RETURN}"
+              exit ${RETURN}
+          fi
+        no_output_timeout: 15m
+    - run:
+        name: Run eclipse-warnings
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          ant eclipse-warnings
+    - persist_to_workspace:
+        root: /home/cassandra
+        paths:
+        - cassandra
+        - .m2
+    environment:
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -731,7 +796,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean long-test
+          ant long-test
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -742,8 +807,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -775,7 +838,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean fqltool-test
+          ant fqltool-test
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -786,8 +849,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -857,7 +918,7 @@ jobs:
           \ executed on every circle container\n# so the goal here is to get 
the circleci\
           \ script to return the tests *this* container will run\n# which we 
do via\
           \ the `circleci` cli tool.\n\ncd cassandra-dtest\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           echo \"***Collected DTests (j11_without_vnodes)***\"\nset -eo 
pipefail &&\
           \ ./run_dtests.py --skip-resource-intensive-tests 
--dtest-print-tests-only\
           \ 
--dtest-print-tests-output=/tmp/all_dtest_tests_j11_without_vnodes_raw\
@@ -874,7 +935,7 @@ jobs:
         no_output_timeout: 15m
         command: "echo \"cat 
/tmp/split_dtest_tests_j11_without_vnodes_final.txt\"\
           \ncat /tmp/split_dtest_tests_j11_without_vnodes_final.txt\n\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           java -version\ncd ~/cassandra-dtest\nmkdir -p /tmp/dtest\n\necho 
\"env:\
           \ $(env)\"\necho \"** done env\"\nmkdir -p /tmp/results/dtests\n# we 
need\
           \ the \"set -o pipefail\" here so that the exit code that circleci 
will\
@@ -893,8 +954,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j11_without_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -910,6 +969,7 @@ jobs:
     - CCM_HEAP_NEWSIZE: 512M
     - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   utests_compression:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
@@ -978,8 +1038,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -997,54 +1055,54 @@ jobs:
     - JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
 workflows:
   version: 2
-  build_and_run_tests:
+  java8_build_and_run_tests:
     jobs:
-    - build
+    - j8_build
     - j8_unit_tests:
         requires:
-        - build
+        - j8_build
     - j8_jvm_dtests:
         requires:
-        - build
+        - j8_build
     - start_j11_unit_tests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j11_unit_tests:
         requires:
         - start_j11_unit_tests
     - start_utests_long:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_long:
         requires:
         - start_utests_long
     - start_utests_compression:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_compression:
         requires:
         - start_utests_compression
     - start_utests_stress:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_stress:
         requires:
         - start_utests_stress
     - start_utests_fqltool:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_fqltool:
         requires:
         - start_utests_fqltool
     - start_j8_dtests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j8_dtests-with-vnodes:
         requires:
         - start_j8_dtests
@@ -1054,7 +1112,7 @@ workflows:
     - start_j11_dtests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j11_dtests-with-vnodes:
         requires:
         - start_j11_dtests
@@ -1064,567 +1122,27 @@ workflows:
     - start_upgrade_tests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j8_upgradetests-no-vnodes:
         requires:
         - start_upgrade_tests
-
-# Original config.yml file:
-# version: 2.1
-# 
-# default_env_vars: &default_env_vars
-#     JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-#     JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-#     ANT_HOME: /usr/share/ant
-#     LANG: en_US.UTF-8
-#     KEEP_TEST_DIR: true
-#     DEFAULT_DIR: /home/cassandra/cassandra-dtest
-#     PYTHONIOENCODING: utf-8
-#     PYTHONUNBUFFERED: true
-#     CASS_DRIVER_NO_EXTENSIONS: true
-#     CASS_DRIVER_NO_CYTHON: true
-#     #Skip all syncing to disk to avoid performance issues in flaky CI 
environments
-#     CASSANDRA_SKIP_SYNC: true
-#     DTEST_REPO: git://github.com/apache/cassandra-dtest.git
-#     DTEST_BRANCH: master
-#     CCM_MAX_HEAP_SIZE: 2048M
-#     CCM_HEAP_NEWSIZE: 512M
-# 
-# j8_par_executor: &j8_par_executor
-#   executor:
-#     name: java8-executor
-#     exec_resource_class: xlarge
-#   parallelism: 100
-# 
-# j8_seq_executor: &j8_seq_executor
-#   executor:
-#     name: java8-executor
-#     exec_resource_class: xlarge
-#   parallelism: 1 # sequential, single container tests: no parallelism 
benefits
-# 
-# j11_par_executor: &j11_par_executor
-#   executor:
-#     name: java11-executor
-#     exec_resource_class: xlarge
-#   parallelism: 100
-# 
-# with_dtests_jobs: &with_dtest_jobs
-#         jobs:
-#             - build
-#             # Java 8 unit tests will be run automatically
-#             - j8_unit_tests:
-#                 requires:
-#                   - build
-#             - j8_jvm_dtests:
-#                 requires:
-#                   - build
-#             # Java 11 unit tests (on request, currently not working)
-#             - start_j11_unit_tests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j11_unit_tests:
-#                 requires:
-#                   - start_j11_unit_tests
-#             # specialized unit tests (all run on request using Java 8)
-#             - start_utests_long:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_long:
-#                 requires:
-#                   - start_utests_long
-#             - start_utests_compression:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_compression:
-#                 requires:
-#                   - start_utests_compression
-#             - start_utests_stress:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_stress:
-#                 requires:
-#                   - start_utests_stress
-#             - start_utests_fqltool:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_fqltool:
-#                 requires:
-#                   - start_utests_fqltool
-#             # Java 8 dtests (on request)
-#             - start_j8_dtests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j8_dtests-with-vnodes:
-#                 requires:
-#                   - start_j8_dtests
-#             - j8_dtests-no-vnodes:
-#                 requires:
-#                   - start_j8_dtests
-#             # Java 11 dtests (on request)
-#             - start_j11_dtests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j11_dtests-with-vnodes:
-#                 requires:
-#                 - start_j11_dtests
-#             - j11_dtests-no-vnodes:
-#                 requires:
-#                 - start_j11_dtests
-#             # Java 8 upgrade tests
-#             - start_upgrade_tests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j8_upgradetests-no-vnodes:
-#                 requires:
-#                   - start_upgrade_tests
-# 
-# with_dtest_jobs_only: &with_dtest_jobs_only
-#         jobs:
-#             - build
-#             - j8_dtests-with-vnodes:
-#                   requires:
-#                       - build
-#             - j8_dtests-no-vnodes:
-#                   requires:
-#                       - build
-# 
-# workflows:
-#     version: 2
-#     build_and_run_tests: *with_dtest_jobs
-#     #build_and_run_tests: *with_dtest_jobs_only
-# 
-# executors:
-#   java8-executor:
-#     parameters:
-#       exec_resource_class:
-#         type: string
-#         default: medium
-#     docker:
-#       - image: 
spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
-#     resource_class: << parameters.exec_resource_class >>
-#     working_directory: ~/
-#     shell: /bin/bash -eo pipefail -l
-#     environment:
-#       <<: *default_env_vars
-#       JAVA_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-#       JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-# 
-#   java11-executor:
-#     parameters:
-#       exec_resource_class:
-#         type: string
-#         default: medium
-#     docker:
-#     - image: spod/cassandra-testing-ubuntu1810-java11:20181210
-#     resource_class: << parameters.exec_resource_class >>
-#     working_directory: ~/
-#     shell: /bin/bash -eo pipefail -l
-#     environment:
-#       <<: *default_env_vars
-#       JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-#       JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-# 
-# jobs:
-#   build:
-#     executor: java11-executor
-#     parallelism: 1 # This job doesn't benefit from parallelism
-#     steps:
-#       - log_environment
-#       - clone_cassandra
-#       - build_cassandra
-#       - run_eclipse_warnings
-#       - persist_to_workspace:
-#             root: /home/cassandra
-#             paths:
-#                 - cassandra
-#                 - .m2
-# 
-#   j8_unit_tests:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - create_junit_containers
-#       - log_environment
-#       - run_parallel_junit_tests
-# 
-#   j8_jvm_dtests:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: test-jvm-dtest-forking
-# 
-#   j11_unit_tests:
-#     <<: *j11_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - create_junit_containers
-#       - log_environment
-#       - run_parallel_junit_tests
-# 
-#   utests_long:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: long-test
-# 
-#   utests_compression:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - create_junit_containers
-#       - log_environment
-#       - run_parallel_junit_tests:
-#           target: testclasslist-compression
-# 
-#   utests_stress:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: stress-test
-# 
-#   utests_fqltool:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: fqltool-test
-# 
-#   j8_dtests-with-vnodes:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - clone_dtest
-#       - create_venv
-#       - create_dtest_containers:
-#           file_tag: j8_with_vnodes
-#           run_dtests_extra_args: '--use-vnodes 
--skip-resource-intensive-tests'
-#       - run_dtests:
-#           file_tag: j8_with_vnodes
-#           pytest_extra_args: '--use-vnodes --num-tokens=32 
--skip-resource-intensive-tests'
-# 
-#   j11_dtests-with-vnodes:
-#     <<: *j11_par_executor
-#     steps:
-#     - attach_workspace:
-#         at: /home/cassandra
-#     - log_environment
-#     - clone_dtest
-#     - create_venv
-#     - create_dtest_containers:
-#         file_tag: j11_with_vnodes
-#         run_dtests_extra_args: '--use-vnodes --skip-resource-intensive-tests'
-#     - run_dtests:
-#         file_tag: j11_with_vnodes
-#         pytest_extra_args: '--use-vnodes --num-tokens=32 
--skip-resource-intensive-tests'
-# 
-#   j8_dtests-no-vnodes:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - clone_dtest
-#       - create_venv
-#       - create_dtest_containers:
-#           file_tag: j8_without_vnodes
-#           run_dtests_extra_args: '--skip-resource-intensive-tests'
-#       - run_dtests:
-#           file_tag: j8_without_vnodes
-#           pytest_extra_args: '--skip-resource-intensive-tests'
-# 
-#   j11_dtests-no-vnodes:
-#     <<: *j11_par_executor
-#     steps:
-#     - attach_workspace:
-#         at: /home/cassandra
-#     - log_environment
-#     - clone_dtest
-#     - create_venv
-#     - create_dtest_containers:
-#         file_tag: j11_without_vnodes
-#         run_dtests_extra_args: '--skip-resource-intensive-tests'
-#     - run_dtests:
-#         file_tag: j11_without_vnodes
-#         pytest_extra_args: '--skip-resource-intensive-tests'
-# 
-#   j8_upgradetests-no-vnodes:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - clone_dtest
-#       - create_venv
-#       - create_dtest_containers:
-#           file_tag: j8_upgradetests_without_vnodes
-#           run_dtests_extra_args: '--execute-upgrade-tests'
-#           extra_env_args: 'RUN_STATIC_UPGRADE_MATRIX=true'
-#           tests_filter_pattern: '^upgrade_tests'
-#       - run_dtests:
-#           file_tag: j8_upgradetests_without_vnodes
-#           extra_env_args: 'RUN_STATIC_UPGRADE_MATRIX=true'
-#           pytest_extra_args: '--execute-upgrade-tests'
-# 
-# commands:
-#   log_environment:
-#     steps:
-#     - run:
-#         name: Log Environment Information
-#         command: |
-#           echo '*** id ***'
-#           id
-#           echo '*** cat /proc/cpuinfo ***'
-#           cat /proc/cpuinfo
-#           echo '*** free -m ***'
-#           free -m
-#           echo '*** df -m ***'
-#           df -m
-#           echo '*** ifconfig -a ***'
-#           ifconfig -a
-#           echo '*** uname -a ***'
-#           uname -a
-#           echo '*** mount ***'
-#           mount
-#           echo '*** env ***'
-#           env
-#           echo '*** java ***'
-#           which java
-#           java -version
-# 
-#   clone_cassandra:
-#     steps:
-#     - run:
-#         name: Clone Cassandra Repository (via git)
-#         command: |
-#           git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
-# 
-#   clone_dtest:
-#     steps:
-#     - run:
-#         name: Clone Cassandra dtest Repository (via git)
-#         command: |
-#           git clone --single-branch --branch $DTEST_BRANCH --depth 1 
$DTEST_REPO ~/cassandra-dtest
-# 
-#   build_cassandra:
-#     steps:
-#     - run:
-#         name: Build Cassandra
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           cd ~/cassandra
-#           # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
-#           for x in $(seq 1 3); do
-#               ${ANT_HOME}/bin/ant clean jar
-#               RETURN=\"$?\"
-#               if [ \"${RETURN}\" -eq \"0\" ]; then
-#                   break
-#               fi
-#           done
-#           # Exit, if we didn't build successfully
-#           if [ \"${RETURN}\" -ne \"0\" ]; then
-#               echo \"Build failed with exit code: ${RETURN}\"
-#               exit ${RETURN}
-#           fi
-#         no_output_timeout: 15m
-# 
-#   run_eclipse_warnings:
-#     steps:
-#     - run:
-#         name: Run eclipse-warnings
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           cd ~/cassandra
-#           ant eclipse-warnings
-# 
-#   create_junit_containers:
-#     steps:
-#     - run:
-#         name: Determine Unit Tests to Run
-#         command: |
-#           # reminder: this code (along with all the steps) is independently 
executed on every circle container
-#           # so the goal here is to get the circleci script to return the 
tests *this* container will run
-#           # which we do via the `circleci` cli tool.
-# 
-#           rm -fr ~/cassandra-dtest/upgrade_tests
-#           echo \"***java tests***\"
-# 
-#           # get all of our unit test filenames
-#           set -eo pipefail && circleci tests glob 
\"$HOME/cassandra/test/unit/**/*.java\" > /tmp/all_java_unit_tests.txt
-# 
-#           # split up the unit tests into groups based on the number of 
containers we have
-#           set -eo pipefail && circleci tests split --split-by=timings 
--timings-type=filename --index=${CIRCLE_NODE_INDEX} 
--total=${CIRCLE_NODE_TOTAL} /tmp/all_java_unit_tests.txt > 
/tmp/java_tests_${CIRCLE_NODE_INDEX}.txt
-#           set -eo pipefail && cat /tmp/java_tests_${CIRCLE_NODE_INDEX}.txt | 
cut -c 37-1000000 | grep \"Test\\.java$\" > 
/tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt
-#           echo \"** /tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt\"
-#           cat /tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt
-# 
-#         no_output_timeout: 15m
-# 
-#   run_junit_tests:
-#     parameters:
-#       target:
-#         type: string
-#       no_output_timeout:
-#         type: string
-#         default: 15m
-#     steps:
-#     - run:
-#         name: Run Unit Tests (<<parameters.target>>)
-#         # Please note that we run `clean` and therefore rebuild the project, 
as we can't run tests on Java 8 in case
-#         # based on Java 11 builds.
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           time mv ~/cassandra /tmp
-#           cd /tmp/cassandra
-#           ant clean <<parameters.target>>
-#         no_output_timeout: <<parameters.no_output_timeout>>
-#     - store_test_results:
-#         path: /tmp/cassandra/build/test/output/
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/output
-#         destination: junitxml
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/logs
-#         destination: logs
-# 
-#   run_parallel_junit_tests:
-#     parameters:
-#       target:
-#         type: string
-#         default: testclasslist
-#       no_output_timeout:
-#         type: string
-#         default: 15m
-#     steps:
-#     - run:
-#         name: Run Unit Tests (<<parameters.target>>)
-#         # Please note that we run `clean` and therefore rebuild the project, 
as we can't run tests on Java 8 in case
-#         # based on Java 11 builds.
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           time mv ~/cassandra /tmp
-#           cd /tmp/cassandra
-#           ant <<parameters.target>> 
-Dtest.classlistfile=/tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt  
-Dtest.classlistprefix=unit
-#         no_output_timeout: <<parameters.no_output_timeout>>
-#     - store_test_results:
-#         path: /tmp/cassandra/build/test/output/
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/output
-#         destination: junitxml
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/logs
-#         destination: logs
-# 
-#   create_venv:
-#     steps:
-#     - run:
-#         name: Configure virtualenv and python Dependencies
-#         command: |
-#           # note, this should be super quick as all dependencies should be 
pre-installed in the docker image
-#           # if additional dependencies were added to requirmeents.txt and 
the docker image hasn't been updated
-#           # we'd have to install it here at runtime -- which will make 
things slow, so do yourself a favor and
-#           # rebuild the docker image! (it automatically pulls the latest 
requirements.txt on build)
-#           source ~/env/bin/activate
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           pip3 install --upgrade -r ~/cassandra-dtest/requirements.txt
-#           pip3 freeze
-# 
-#   create_dtest_containers:
-#     parameters:
-#       file_tag:
-#         type: string
-#       run_dtests_extra_args:
-#         type: string
-#         default: ''
-#       extra_env_args:
-#         type: string
-#         default: ''
-#       tests_filter_pattern:
-#         type: string
-#         default: ''
-#     steps:
-#     - run:
-#         name: Determine Tests to Run (<<parameters.file_tag>>)
-#         no_output_timeout: 5m
-#         command: |
-#           # reminder: this code (along with all the steps) is independently 
executed on every circle container
-#           # so the goal here is to get the circleci script to return the 
tests *this* container will run
-#           # which we do via the `circleci` cli tool.
-# 
-#           cd cassandra-dtest
-#           source ~/env/bin/activate
-#           export PATH=$JAVA_HOME/bin:$PATH
-# 
-#           if [ -n '<<parameters.extra_env_args>>' ]; then
-#             export <<parameters.extra_env_args>>
-#           fi
-# 
-#           echo \"***Collected DTests (<<parameters.file_tag>>)***\"
-#           set -eo pipefail && ./run_dtests.py 
<<parameters.run_dtests_extra_args>> --dtest-print-tests-only 
--dtest-print-tests-output=/tmp/all_dtest_tests_<<parameters.file_tag>>_raw 
--cassandra-dir=../cassandra
-#           if [ -z '<<parameters.tests_filter_pattern>>' ]; then
-#             mv /tmp/all_dtest_tests_<<parameters.file_tag>>_raw 
/tmp/all_dtest_tests_<<parameters.file_tag>>
-#           else
-#             grep -e '<<parameters.tests_filter_pattern>>' 
/tmp/all_dtest_tests_<<parameters.file_tag>>_raw > 
/tmp/all_dtest_tests_<<parameters.file_tag>> || { echo \"Filter did not match 
any tests! Exiting build.\"; exit 0; }
-#           fi
-#           set -eo pipefail && circleci tests split --split-by=timings 
--timings-type=classname /tmp/all_dtest_tests_<<parameters.file_tag>> > 
/tmp/split_dtest_tests_<<parameters.file_tag>>.txt
-#           cat /tmp/split_dtest_tests_<<parameters.file_tag>>.txt | tr '\\n' 
' ' > /tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt
-#           cat /tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt
-# 
-#   run_dtests:
-#     parameters:
-#       file_tag:
-#         type: string
-#       pytest_extra_args:
-#         type: string
-#         default: ''
-#       extra_env_args:
-#         type: string
-#         default: ''
-#     steps:
-#       - run:
-#           name: Run dtests (<<parameters.file_tag>>)
-#           no_output_timeout: 15m
-#           command: |
-#             echo \"cat 
/tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt\"
-#             cat /tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt
-# 
-#             source ~/env/bin/activate
-#             export PATH=$JAVA_HOME/bin:$PATH
-#             if [ -n '<<parameters.extra_env_args>>' ]; then
-#               export <<parameters.extra_env_args>>
-#             fi
-# 
-#             java -version
-#             cd ~/cassandra-dtest
-#             mkdir -p /tmp/dtest
-# 
-#             echo \"env: $(env)\"
-#             echo \"** done env\"
-#             mkdir -p /tmp/results/dtests
-#             # we need the \"set -o pipefail\" here so that the exit code 
that circleci will actually use is from pytest and not the exit code from tee
-#             export SPLIT_TESTS=`cat 
/tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt`
-#             set -o pipefail && cd ~/cassandra-dtest && pytest 
<<parameters.pytest_extra_args>> --log-level=\"INFO\" 
--junit-xml=/tmp/results/dtests/pytest_result_<<parameters.file_tag>>.xml -s 
--cassandra-dir=/home/cassandra/cassandra --keep-test-dir $SPLIT_TESTS 2>&1 | 
tee /tmp/dtest/stdout.txt
-#       - store_test_results:
-#           path: /tmp/results
-#       - store_artifacts:
-#           path: /tmp/dtest
-#           destination: dtest_<<parameters.file_tag>>
-#       - store_artifacts:
-#           path: ~/cassandra-dtest/logs
-#           destination: dtest_<<parameters.file_tag>>_logs
\ No newline at end of file
+  java11_build_and_run_tests:
+    jobs:
+    - j11_build
+    - start_j11_unit_tests:
+        type: approval
+        requires:
+        - j11_build
+    - j11_unit_tests:
+        requires:
+        - start_j11_unit_tests
+    - start_j11_dtests:
+        type: approval
+        requires:
+        - j11_build
+    - j11_dtests-with-vnodes:
+        requires:
+        - start_j11_dtests
+    - j11_dtests-no-vnodes:
+        requires:
+        - start_j11_dtests
diff --git a/.circleci/config.yml.LOWRES b/.circleci/config.yml.LOWRES
index 1b1952d..27fda51 100644
--- a/.circleci/config.yml.LOWRES
+++ b/.circleci/config.yml.LOWRES
@@ -68,90 +68,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-    - ANT_HOME: /usr/share/ant
-    - LANG: en_US.UTF-8
-    - KEEP_TEST_DIR: true
-    - DEFAULT_DIR: /home/cassandra/cassandra-dtest
-    - PYTHONIOENCODING: utf-8
-    - PYTHONUNBUFFERED: true
-    - CASS_DRIVER_NO_EXTENSIONS: true
-    - CASS_DRIVER_NO_CYTHON: true
-    - CASSANDRA_SKIP_SYNC: true
-    - DTEST_REPO: git://github.com/apache/cassandra-dtest.git
-    - DTEST_BRANCH: master
-    - CCM_MAX_HEAP_SIZE: 1024M
-    - CCM_HEAP_NEWSIZE: 256M
-    - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-    - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-  build:
-    docker:
-    - image: spod/cassandra-testing-ubuntu1810-java11:20181210
-    resource_class: medium
-    working_directory: ~/
-    shell: /bin/bash -eo pipefail -l
-    parallelism: 1
-    steps:
-    - run:
-        name: Log Environment Information
-        command: |
-          echo '*** id ***'
-          id
-          echo '*** cat /proc/cpuinfo ***'
-          cat /proc/cpuinfo
-          echo '*** free -m ***'
-          free -m
-          echo '*** df -m ***'
-          df -m
-          echo '*** ifconfig -a ***'
-          ifconfig -a
-          echo '*** uname -a ***'
-          uname -a
-          echo '*** mount ***'
-          mount
-          echo '*** env ***'
-          env
-          echo '*** java ***'
-          which java
-          java -version
-    - run:
-        name: Clone Cassandra Repository (via git)
-        command: |
-          git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
-    - run:
-        name: Build Cassandra
-        command: |
-          export PATH=$JAVA_HOME/bin:$PATH
-          cd ~/cassandra
-          # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
-          for x in $(seq 1 3); do
-              ${ANT_HOME}/bin/ant clean jar
-              RETURN="$?"
-              if [ "${RETURN}" -eq "0" ]; then
-                  break
-              fi
-          done
-          # Exit, if we didn't build successfully
-          if [ "${RETURN}" -ne "0" ]; then
-              echo "Build failed with exit code: ${RETURN}"
-              exit ${RETURN}
-          fi
-        no_output_timeout: 15m
-    - run:
-        name: Run eclipse-warnings
-        command: |
-          export PATH=$JAVA_HOME/bin:$PATH
-          cd ~/cassandra
-          ant eclipse-warnings
-    - persist_to_workspace:
-        root: /home/cassandra
-        paths:
-        - cassandra
-        - .m2
-    environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -167,6 +83,7 @@ jobs:
     - CCM_HEAP_NEWSIZE: 256M
     - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   j11_dtests-with-vnodes:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11:20181210
@@ -221,7 +138,7 @@ jobs:
           \ executed on every circle container\n# so the goal here is to get 
the circleci\
           \ script to return the tests *this* container will run\n# which we 
do via\
           \ the `circleci` cli tool.\n\ncd cassandra-dtest\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           echo \"***Collected DTests (j11_with_vnodes)***\"\nset -eo pipefail 
&& ./run_dtests.py\
           \ --use-vnodes --skip-resource-intensive-tests 
--dtest-print-tests-only\
           \ 
--dtest-print-tests-output=/tmp/all_dtest_tests_j11_with_vnodes_raw 
--cassandra-dir=../cassandra\n\
@@ -237,7 +154,7 @@ jobs:
         no_output_timeout: 15m
         command: "echo \"cat 
/tmp/split_dtest_tests_j11_with_vnodes_final.txt\"\n\
           cat /tmp/split_dtest_tests_j11_with_vnodes_final.txt\n\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           java -version\ncd ~/cassandra-dtest\nmkdir -p /tmp/dtest\n\necho 
\"env:\
           \ $(env)\"\necho \"** done env\"\nmkdir -p /tmp/results/dtests\n# we 
need\
           \ the \"set -o pipefail\" here so that the exit code that circleci 
will\
@@ -256,8 +173,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j11_with_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -273,6 +188,7 @@ jobs:
     - CCM_HEAP_NEWSIZE: 256M
     - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   j8_dtests-no-vnodes:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
@@ -341,8 +257,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j8_without_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -441,8 +355,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j8_upgradetests_without_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -474,7 +386,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean stress-test
+          ant stress-test
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -485,8 +397,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -570,8 +480,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -587,6 +495,87 @@ jobs:
     - CCM_HEAP_NEWSIZE: 256M
     - JAVA_HOME: /usr/lib/jvm/java-8-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
+  j11_build:
+    docker:
+    - image: spod/cassandra-testing-ubuntu1810-java11:20181210
+    resource_class: medium
+    working_directory: ~/
+    shell: /bin/bash -eo pipefail -l
+    parallelism: 1
+    steps:
+    - run:
+        name: Log Environment Information
+        command: |
+          echo '*** id ***'
+          id
+          echo '*** cat /proc/cpuinfo ***'
+          cat /proc/cpuinfo
+          echo '*** free -m ***'
+          free -m
+          echo '*** df -m ***'
+          df -m
+          echo '*** ifconfig -a ***'
+          ifconfig -a
+          echo '*** uname -a ***'
+          uname -a
+          echo '*** mount ***'
+          mount
+          echo '*** env ***'
+          env
+          echo '*** java ***'
+          which java
+          java -version
+    - run:
+        name: Clone Cassandra Repository (via git)
+        command: |
+          git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
+    - run:
+        name: Build Cassandra
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
+          for x in $(seq 1 3); do
+              ${ANT_HOME}/bin/ant clean realclean jar
+              RETURN="$?"
+              if [ "${RETURN}" -eq "0" ]; then
+                  break
+              fi
+          done
+          # Exit, if we didn't build successfully
+          if [ "${RETURN}" -ne "0" ]; then
+              echo "Build failed with exit code: ${RETURN}"
+              exit ${RETURN}
+          fi
+        no_output_timeout: 15m
+    - run:
+        name: Run eclipse-warnings
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          ant eclipse-warnings
+    - persist_to_workspace:
+        root: /home/cassandra
+        paths:
+        - cassandra
+        - .m2
+    environment:
+    - ANT_HOME: /usr/share/ant
+    - LANG: en_US.UTF-8
+    - KEEP_TEST_DIR: true
+    - DEFAULT_DIR: /home/cassandra/cassandra-dtest
+    - PYTHONIOENCODING: utf-8
+    - PYTHONUNBUFFERED: true
+    - CASS_DRIVER_NO_EXTENSIONS: true
+    - CASS_DRIVER_NO_CYTHON: true
+    - CASSANDRA_SKIP_SYNC: true
+    - DTEST_REPO: git://github.com/apache/cassandra-dtest.git
+    - DTEST_BRANCH: master
+    - CCM_MAX_HEAP_SIZE: 1024M
+    - CCM_HEAP_NEWSIZE: 256M
+    - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   j8_dtests-with-vnodes:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
@@ -654,8 +643,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j8_with_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -687,7 +674,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean test-jvm-dtest-forking
+          ant test-jvm-dtest-forking
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -698,8 +685,86 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - ANT_HOME: /usr/share/ant
+    - LANG: en_US.UTF-8
+    - KEEP_TEST_DIR: true
+    - DEFAULT_DIR: /home/cassandra/cassandra-dtest
+    - PYTHONIOENCODING: utf-8
+    - PYTHONUNBUFFERED: true
+    - CASS_DRIVER_NO_EXTENSIONS: true
+    - CASS_DRIVER_NO_CYTHON: true
+    - CASSANDRA_SKIP_SYNC: true
+    - DTEST_REPO: git://github.com/apache/cassandra-dtest.git
+    - DTEST_BRANCH: master
+    - CCM_MAX_HEAP_SIZE: 1024M
+    - CCM_HEAP_NEWSIZE: 256M
+    - JAVA_HOME: /usr/lib/jvm/java-8-openjdk-amd64
+    - JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
+  j8_build:
+    docker:
+    - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
+    resource_class: medium
+    working_directory: ~/
+    shell: /bin/bash -eo pipefail -l
+    parallelism: 1
+    steps:
+    - run:
+        name: Log Environment Information
+        command: |
+          echo '*** id ***'
+          id
+          echo '*** cat /proc/cpuinfo ***'
+          cat /proc/cpuinfo
+          echo '*** free -m ***'
+          free -m
+          echo '*** df -m ***'
+          df -m
+          echo '*** ifconfig -a ***'
+          ifconfig -a
+          echo '*** uname -a ***'
+          uname -a
+          echo '*** mount ***'
+          mount
+          echo '*** env ***'
+          env
+          echo '*** java ***'
+          which java
+          java -version
+    - run:
+        name: Clone Cassandra Repository (via git)
+        command: |
+          git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
+    - run:
+        name: Build Cassandra
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
+          for x in $(seq 1 3); do
+              ${ANT_HOME}/bin/ant clean realclean jar
+              RETURN="$?"
+              if [ "${RETURN}" -eq "0" ]; then
+                  break
+              fi
+          done
+          # Exit, if we didn't build successfully
+          if [ "${RETURN}" -ne "0" ]; then
+              echo "Build failed with exit code: ${RETURN}"
+              exit ${RETURN}
+          fi
+        no_output_timeout: 15m
+    - run:
+        name: Run eclipse-warnings
+        command: |
+          export PATH=$JAVA_HOME/bin:$PATH
+          cd ~/cassandra
+          ant eclipse-warnings
+    - persist_to_workspace:
+        root: /home/cassandra
+        paths:
+        - cassandra
+        - .m2
+    environment:
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -731,7 +796,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean long-test
+          ant long-test
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -742,8 +807,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -775,7 +838,7 @@ jobs:
           export PATH=$JAVA_HOME/bin:$PATH
           time mv ~/cassandra /tmp
           cd /tmp/cassandra
-          ant clean fqltool-test
+          ant fqltool-test
         no_output_timeout: 15m
     - store_test_results:
         path: /tmp/cassandra/build/test/output/
@@ -786,8 +849,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -857,7 +918,7 @@ jobs:
           \ executed on every circle container\n# so the goal here is to get 
the circleci\
           \ script to return the tests *this* container will run\n# which we 
do via\
           \ the `circleci` cli tool.\n\ncd cassandra-dtest\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\n\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           echo \"***Collected DTests (j11_without_vnodes)***\"\nset -eo 
pipefail &&\
           \ ./run_dtests.py --skip-resource-intensive-tests 
--dtest-print-tests-only\
           \ 
--dtest-print-tests-output=/tmp/all_dtest_tests_j11_without_vnodes_raw\
@@ -874,7 +935,7 @@ jobs:
         no_output_timeout: 15m
         command: "echo \"cat 
/tmp/split_dtest_tests_j11_without_vnodes_final.txt\"\
           \ncat /tmp/split_dtest_tests_j11_without_vnodes_final.txt\n\nsource 
~/env/bin/activate\n\
-          export PATH=$JAVA_HOME/bin:$PATH\nif [ -z '' ]; then\n  export 
\nfi\n\n\
+          export PATH=$JAVA_HOME/bin:$PATH\nif [ -n '' ]; then\n  export 
\nfi\n\n\
           java -version\ncd ~/cassandra-dtest\nmkdir -p /tmp/dtest\n\necho 
\"env:\
           \ $(env)\"\necho \"** done env\"\nmkdir -p /tmp/results/dtests\n# we 
need\
           \ the \"set -o pipefail\" here so that the exit code that circleci 
will\
@@ -893,8 +954,6 @@ jobs:
         path: ~/cassandra-dtest/logs
         destination: dtest_j11_without_vnodes_logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -910,6 +969,7 @@ jobs:
     - CCM_HEAP_NEWSIZE: 256M
     - JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
+    - CASSANDRA_USE_JDK11: true
   utests_compression:
     docker:
     - image: spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
@@ -978,8 +1038,6 @@ jobs:
         path: /tmp/cassandra/build/test/logs
         destination: logs
     environment:
-    - JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-    - JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
     - ANT_HOME: /usr/share/ant
     - LANG: en_US.UTF-8
     - KEEP_TEST_DIR: true
@@ -997,54 +1055,54 @@ jobs:
     - JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
 workflows:
   version: 2
-  build_and_run_tests:
+  java8_build_and_run_tests:
     jobs:
-    - build
+    - j8_build
     - j8_unit_tests:
         requires:
-        - build
+        - j8_build
     - j8_jvm_dtests:
         requires:
-        - build
+        - j8_build
     - start_j11_unit_tests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j11_unit_tests:
         requires:
         - start_j11_unit_tests
     - start_utests_long:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_long:
         requires:
         - start_utests_long
     - start_utests_compression:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_compression:
         requires:
         - start_utests_compression
     - start_utests_stress:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_stress:
         requires:
         - start_utests_stress
     - start_utests_fqltool:
         type: approval
         requires:
-        - build
+        - j8_build
     - utests_fqltool:
         requires:
         - start_utests_fqltool
     - start_j8_dtests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j8_dtests-with-vnodes:
         requires:
         - start_j8_dtests
@@ -1054,7 +1112,7 @@ workflows:
     - start_j11_dtests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j11_dtests-with-vnodes:
         requires:
         - start_j11_dtests
@@ -1064,567 +1122,27 @@ workflows:
     - start_upgrade_tests:
         type: approval
         requires:
-        - build
+        - j8_build
     - j8_upgradetests-no-vnodes:
         requires:
         - start_upgrade_tests
-
-# Original config.yml file:
-# version: 2.1
-# 
-# default_env_vars: &default_env_vars
-#     JAVA8_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-#     JAVA11_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-#     ANT_HOME: /usr/share/ant
-#     LANG: en_US.UTF-8
-#     KEEP_TEST_DIR: true
-#     DEFAULT_DIR: /home/cassandra/cassandra-dtest
-#     PYTHONIOENCODING: utf-8
-#     PYTHONUNBUFFERED: true
-#     CASS_DRIVER_NO_EXTENSIONS: true
-#     CASS_DRIVER_NO_CYTHON: true
-#     #Skip all syncing to disk to avoid performance issues in flaky CI 
environments
-#     CASSANDRA_SKIP_SYNC: true
-#     DTEST_REPO: git://github.com/apache/cassandra-dtest.git
-#     DTEST_BRANCH: master
-#     CCM_MAX_HEAP_SIZE: 1024M
-#     CCM_HEAP_NEWSIZE: 256M
-# 
-# j8_par_executor: &j8_par_executor
-#   executor:
-#     name: java8-executor
-#     #exec_resource_class: xlarge
-#   parallelism: 4
-# 
-# j8_seq_executor: &j8_seq_executor
-#   executor:
-#     name: java8-executor
-#     #exec_resource_class: xlarge
-#   parallelism: 1 # sequential, single container tests: no parallelism 
benefits
-# 
-# j11_par_executor: &j11_par_executor
-#   executor:
-#     name: java11-executor
-#     #exec_resource_class: xlarge
-#   parallelism: 4
-# 
-# with_dtests_jobs: &with_dtest_jobs
-#         jobs:
-#             - build
-#             # Java 8 unit tests will be run automatically
-#             - j8_unit_tests:
-#                 requires:
-#                   - build
-#             - j8_jvm_dtests:
-#                 requires:
-#                   - build
-#             # Java 11 unit tests (on request, currently not working)
-#             - start_j11_unit_tests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j11_unit_tests:
-#                 requires:
-#                   - start_j11_unit_tests
-#             # specialized unit tests (all run on request using Java 8)
-#             - start_utests_long:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_long:
-#                 requires:
-#                   - start_utests_long
-#             - start_utests_compression:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_compression:
-#                 requires:
-#                   - start_utests_compression
-#             - start_utests_stress:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_stress:
-#                 requires:
-#                   - start_utests_stress
-#             - start_utests_fqltool:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - utests_fqltool:
-#                 requires:
-#                   - start_utests_fqltool
-#             # Java 8 dtests (on request)
-#             - start_j8_dtests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j8_dtests-with-vnodes:
-#                 requires:
-#                   - start_j8_dtests
-#             - j8_dtests-no-vnodes:
-#                 requires:
-#                   - start_j8_dtests
-#             # Java 11 dtests (on request)
-#             - start_j11_dtests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j11_dtests-with-vnodes:
-#                 requires:
-#                 - start_j11_dtests
-#             - j11_dtests-no-vnodes:
-#                 requires:
-#                 - start_j11_dtests
-#             # Java 8 upgrade tests
-#             - start_upgrade_tests:
-#                 type: approval
-#                 requires:
-#                   - build
-#             - j8_upgradetests-no-vnodes:
-#                 requires:
-#                   - start_upgrade_tests
-# 
-# with_dtest_jobs_only: &with_dtest_jobs_only
-#         jobs:
-#             - build
-#             - j8_dtests-with-vnodes:
-#                   requires:
-#                       - build
-#             - j8_dtests-no-vnodes:
-#                   requires:
-#                       - build
-# 
-# workflows:
-#     version: 2
-#     build_and_run_tests: *with_dtest_jobs
-#     #build_and_run_tests: *with_dtest_jobs_only
-# 
-# executors:
-#   java8-executor:
-#     parameters:
-#       exec_resource_class:
-#         type: string
-#         default: medium
-#     docker:
-#       - image: 
spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306
-#     resource_class: << parameters.exec_resource_class >>
-#     working_directory: ~/
-#     shell: /bin/bash -eo pipefail -l
-#     environment:
-#       <<: *default_env_vars
-#       JAVA_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-#       JDK_HOME: /usr/lib/jvm/java-8-openjdk-amd64
-# 
-#   java11-executor:
-#     parameters:
-#       exec_resource_class:
-#         type: string
-#         default: medium
-#     docker:
-#     - image: spod/cassandra-testing-ubuntu1810-java11:20181210
-#     resource_class: << parameters.exec_resource_class >>
-#     working_directory: ~/
-#     shell: /bin/bash -eo pipefail -l
-#     environment:
-#       <<: *default_env_vars
-#       JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-#       JDK_HOME: /usr/lib/jvm/java-11-openjdk-amd64
-# 
-# jobs:
-#   build:
-#     executor: java11-executor
-#     parallelism: 1 # This job doesn't benefit from parallelism
-#     steps:
-#       - log_environment
-#       - clone_cassandra
-#       - build_cassandra
-#       - run_eclipse_warnings
-#       - persist_to_workspace:
-#             root: /home/cassandra
-#             paths:
-#                 - cassandra
-#                 - .m2
-# 
-#   j8_unit_tests:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - create_junit_containers
-#       - log_environment
-#       - run_parallel_junit_tests
-# 
-#   j8_jvm_dtests:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: test-jvm-dtest-forking
-# 
-#   j11_unit_tests:
-#     <<: *j11_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - create_junit_containers
-#       - log_environment
-#       - run_parallel_junit_tests
-# 
-#   utests_long:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: long-test
-# 
-#   utests_compression:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - create_junit_containers
-#       - log_environment
-#       - run_parallel_junit_tests:
-#           target: testclasslist-compression
-# 
-#   utests_stress:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: stress-test
-# 
-#   utests_fqltool:
-#     <<: *j8_seq_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - run_junit_tests:
-#           target: fqltool-test
-# 
-#   j8_dtests-with-vnodes:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - clone_dtest
-#       - create_venv
-#       - create_dtest_containers:
-#           file_tag: j8_with_vnodes
-#           run_dtests_extra_args: '--use-vnodes 
--skip-resource-intensive-tests'
-#       - run_dtests:
-#           file_tag: j8_with_vnodes
-#           pytest_extra_args: '--use-vnodes --num-tokens=32 
--skip-resource-intensive-tests'
-# 
-#   j11_dtests-with-vnodes:
-#     <<: *j11_par_executor
-#     steps:
-#     - attach_workspace:
-#         at: /home/cassandra
-#     - log_environment
-#     - clone_dtest
-#     - create_venv
-#     - create_dtest_containers:
-#         file_tag: j11_with_vnodes
-#         run_dtests_extra_args: '--use-vnodes --skip-resource-intensive-tests'
-#     - run_dtests:
-#         file_tag: j11_with_vnodes
-#         pytest_extra_args: '--use-vnodes --num-tokens=32 
--skip-resource-intensive-tests'
-# 
-#   j8_dtests-no-vnodes:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - clone_dtest
-#       - create_venv
-#       - create_dtest_containers:
-#           file_tag: j8_without_vnodes
-#           run_dtests_extra_args: '--skip-resource-intensive-tests'
-#       - run_dtests:
-#           file_tag: j8_without_vnodes
-#           pytest_extra_args: '--skip-resource-intensive-tests'
-# 
-#   j11_dtests-no-vnodes:
-#     <<: *j11_par_executor
-#     steps:
-#     - attach_workspace:
-#         at: /home/cassandra
-#     - log_environment
-#     - clone_dtest
-#     - create_venv
-#     - create_dtest_containers:
-#         file_tag: j11_without_vnodes
-#         run_dtests_extra_args: '--skip-resource-intensive-tests'
-#     - run_dtests:
-#         file_tag: j11_without_vnodes
-#         pytest_extra_args: '--skip-resource-intensive-tests'
-# 
-#   j8_upgradetests-no-vnodes:
-#     <<: *j8_par_executor
-#     steps:
-#       - attach_workspace:
-#           at: /home/cassandra
-#       - clone_dtest
-#       - create_venv
-#       - create_dtest_containers:
-#           file_tag: j8_upgradetests_without_vnodes
-#           run_dtests_extra_args: '--execute-upgrade-tests'
-#           extra_env_args: 'RUN_STATIC_UPGRADE_MATRIX=true'
-#           tests_filter_pattern: '^upgrade_tests'
-#       - run_dtests:
-#           file_tag: j8_upgradetests_without_vnodes
-#           extra_env_args: 'RUN_STATIC_UPGRADE_MATRIX=true'
-#           pytest_extra_args: '--execute-upgrade-tests'
-# 
-# commands:
-#   log_environment:
-#     steps:
-#     - run:
-#         name: Log Environment Information
-#         command: |
-#           echo '*** id ***'
-#           id
-#           echo '*** cat /proc/cpuinfo ***'
-#           cat /proc/cpuinfo
-#           echo '*** free -m ***'
-#           free -m
-#           echo '*** df -m ***'
-#           df -m
-#           echo '*** ifconfig -a ***'
-#           ifconfig -a
-#           echo '*** uname -a ***'
-#           uname -a
-#           echo '*** mount ***'
-#           mount
-#           echo '*** env ***'
-#           env
-#           echo '*** java ***'
-#           which java
-#           java -version
-# 
-#   clone_cassandra:
-#     steps:
-#     - run:
-#         name: Clone Cassandra Repository (via git)
-#         command: |
-#           git clone --single-branch --depth 1 --branch $CIRCLE_BRANCH 
git://github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME.git 
~/cassandra
-# 
-#   clone_dtest:
-#     steps:
-#     - run:
-#         name: Clone Cassandra dtest Repository (via git)
-#         command: |
-#           git clone --single-branch --branch $DTEST_BRANCH --depth 1 
$DTEST_REPO ~/cassandra-dtest
-# 
-#   build_cassandra:
-#     steps:
-#     - run:
-#         name: Build Cassandra
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           cd ~/cassandra
-#           # Loop to prevent failure due to maven-ant-tasks not downloading a 
jar..
-#           for x in $(seq 1 3); do
-#               ${ANT_HOME}/bin/ant clean jar
-#               RETURN=\"$?\"
-#               if [ \"${RETURN}\" -eq \"0\" ]; then
-#                   break
-#               fi
-#           done
-#           # Exit, if we didn't build successfully
-#           if [ \"${RETURN}\" -ne \"0\" ]; then
-#               echo \"Build failed with exit code: ${RETURN}\"
-#               exit ${RETURN}
-#           fi
-#         no_output_timeout: 15m
-# 
-#   run_eclipse_warnings:
-#     steps:
-#     - run:
-#         name: Run eclipse-warnings
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           cd ~/cassandra
-#           ant eclipse-warnings
-# 
-#   create_junit_containers:
-#     steps:
-#     - run:
-#         name: Determine Unit Tests to Run
-#         command: |
-#           # reminder: this code (along with all the steps) is independently 
executed on every circle container
-#           # so the goal here is to get the circleci script to return the 
tests *this* container will run
-#           # which we do via the `circleci` cli tool.
-# 
-#           rm -fr ~/cassandra-dtest/upgrade_tests
-#           echo \"***java tests***\"
-# 
-#           # get all of our unit test filenames
-#           set -eo pipefail && circleci tests glob 
\"$HOME/cassandra/test/unit/**/*.java\" > /tmp/all_java_unit_tests.txt
-# 
-#           # split up the unit tests into groups based on the number of 
containers we have
-#           set -eo pipefail && circleci tests split --split-by=timings 
--timings-type=filename --index=${CIRCLE_NODE_INDEX} 
--total=${CIRCLE_NODE_TOTAL} /tmp/all_java_unit_tests.txt > 
/tmp/java_tests_${CIRCLE_NODE_INDEX}.txt
-#           set -eo pipefail && cat /tmp/java_tests_${CIRCLE_NODE_INDEX}.txt | 
cut -c 37-1000000 | grep \"Test\\.java$\" > 
/tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt
-#           echo \"** /tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt\"
-#           cat /tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt
-# 
-#         no_output_timeout: 15m
-# 
-#   run_junit_tests:
-#     parameters:
-#       target:
-#         type: string
-#       no_output_timeout:
-#         type: string
-#         default: 15m
-#     steps:
-#     - run:
-#         name: Run Unit Tests (<<parameters.target>>)
-#         # Please note that we run `clean` and therefore rebuild the project, 
as we can't run tests on Java 8 in case
-#         # based on Java 11 builds.
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           time mv ~/cassandra /tmp
-#           cd /tmp/cassandra
-#           ant clean <<parameters.target>>
-#         no_output_timeout: <<parameters.no_output_timeout>>
-#     - store_test_results:
-#         path: /tmp/cassandra/build/test/output/
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/output
-#         destination: junitxml
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/logs
-#         destination: logs
-# 
-#   run_parallel_junit_tests:
-#     parameters:
-#       target:
-#         type: string
-#         default: testclasslist
-#       no_output_timeout:
-#         type: string
-#         default: 15m
-#     steps:
-#     - run:
-#         name: Run Unit Tests (<<parameters.target>>)
-#         # Please note that we run `clean` and therefore rebuild the project, 
as we can't run tests on Java 8 in case
-#         # based on Java 11 builds.
-#         command: |
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           time mv ~/cassandra /tmp
-#           cd /tmp/cassandra
-#           ant <<parameters.target>> 
-Dtest.classlistfile=/tmp/java_tests_${CIRCLE_NODE_INDEX}_final.txt  
-Dtest.classlistprefix=unit
-#         no_output_timeout: <<parameters.no_output_timeout>>
-#     - store_test_results:
-#         path: /tmp/cassandra/build/test/output/
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/output
-#         destination: junitxml
-#     - store_artifacts:
-#         path: /tmp/cassandra/build/test/logs
-#         destination: logs
-# 
-#   create_venv:
-#     steps:
-#     - run:
-#         name: Configure virtualenv and python Dependencies
-#         command: |
-#           # note, this should be super quick as all dependencies should be 
pre-installed in the docker image
-#           # if additional dependencies were added to requirmeents.txt and 
the docker image hasn't been updated
-#           # we'd have to install it here at runtime -- which will make 
things slow, so do yourself a favor and
-#           # rebuild the docker image! (it automatically pulls the latest 
requirements.txt on build)
-#           source ~/env/bin/activate
-#           export PATH=$JAVA_HOME/bin:$PATH
-#           pip3 install --upgrade -r ~/cassandra-dtest/requirements.txt
-#           pip3 freeze
-# 
-#   create_dtest_containers:
-#     parameters:
-#       file_tag:
-#         type: string
-#       run_dtests_extra_args:
-#         type: string
-#         default: ''
-#       extra_env_args:
-#         type: string
-#         default: ''
-#       tests_filter_pattern:
-#         type: string
-#         default: ''
-#     steps:
-#     - run:
-#         name: Determine Tests to Run (<<parameters.file_tag>>)
-#         no_output_timeout: 5m
-#         command: |
-#           # reminder: this code (along with all the steps) is independently 
executed on every circle container
-#           # so the goal here is to get the circleci script to return the 
tests *this* container will run
-#           # which we do via the `circleci` cli tool.
-# 
-#           cd cassandra-dtest
-#           source ~/env/bin/activate
-#           export PATH=$JAVA_HOME/bin:$PATH
-# 
-#           if [ -n '<<parameters.extra_env_args>>' ]; then
-#             export <<parameters.extra_env_args>>
-#           fi
-# 
-#           echo \"***Collected DTests (<<parameters.file_tag>>)***\"
-#           set -eo pipefail && ./run_dtests.py 
<<parameters.run_dtests_extra_args>> --dtest-print-tests-only 
--dtest-print-tests-output=/tmp/all_dtest_tests_<<parameters.file_tag>>_raw 
--cassandra-dir=../cassandra
-#           if [ -z '<<parameters.tests_filter_pattern>>' ]; then
-#             mv /tmp/all_dtest_tests_<<parameters.file_tag>>_raw 
/tmp/all_dtest_tests_<<parameters.file_tag>>
-#           else
-#             grep -e '<<parameters.tests_filter_pattern>>' 
/tmp/all_dtest_tests_<<parameters.file_tag>>_raw > 
/tmp/all_dtest_tests_<<parameters.file_tag>> || { echo \"Filter did not match 
any tests! Exiting build.\"; exit 0; }
-#           fi
-#           set -eo pipefail && circleci tests split --split-by=timings 
--timings-type=classname /tmp/all_dtest_tests_<<parameters.file_tag>> > 
/tmp/split_dtest_tests_<<parameters.file_tag>>.txt
-#           cat /tmp/split_dtest_tests_<<parameters.file_tag>>.txt | tr '\\n' 
' ' > /tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt
-#           cat /tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt
-# 
-#   run_dtests:
-#     parameters:
-#       file_tag:
-#         type: string
-#       pytest_extra_args:
-#         type: string
-#         default: ''
-#       extra_env_args:
-#         type: string
-#         default: ''
-#     steps:
-#       - run:
-#           name: Run dtests (<<parameters.file_tag>>)
-#           no_output_timeout: 15m
-#           command: |
-#             echo \"cat 
/tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt\"
-#             cat /tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt
-# 
-#             source ~/env/bin/activate
-#             export PATH=$JAVA_HOME/bin:$PATH
-#             if [ -n '<<parameters.extra_env_args>>' ]; then
-#               export <<parameters.extra_env_args>>
-#             fi
-# 
-#             java -version
-#             cd ~/cassandra-dtest
-#             mkdir -p /tmp/dtest
-# 
-#             echo \"env: $(env)\"
-#             echo \"** done env\"
-#             mkdir -p /tmp/results/dtests
-#             # we need the \"set -o pipefail\" here so that the exit code 
that circleci will actually use is from pytest and not the exit code from tee
-#             export SPLIT_TESTS=`cat 
/tmp/split_dtest_tests_<<parameters.file_tag>>_final.txt`
-#             set -o pipefail && cd ~/cassandra-dtest && pytest 
<<parameters.pytest_extra_args>> --log-level=\"INFO\" 
--junit-xml=/tmp/results/dtests/pytest_result_<<parameters.file_tag>>.xml -s 
--cassandra-dir=/home/cassandra/cassandra --keep-test-dir $SPLIT_TESTS 2>&1 | 
tee /tmp/dtest/stdout.txt
-#       - store_test_results:
-#           path: /tmp/results
-#       - store_artifacts:
-#           path: /tmp/dtest
-#           destination: dtest_<<parameters.file_tag>>
-#       - store_artifacts:
-#           path: ~/cassandra-dtest/logs
-#           destination: dtest_<<parameters.file_tag>>_logs
\ No newline at end of file
+  java11_build_and_run_tests:
+    jobs:
+    - j11_build
+    - start_j11_unit_tests:
+        type: approval
+        requires:
+        - j11_build
+    - j11_unit_tests:
+        requires:
+        - start_j11_unit_tests
+    - start_j11_dtests:
+        type: approval
+        requires:
+        - j11_build
+    - j11_dtests-with-vnodes:
+        requires:
+        - start_j11_dtests
+    - j11_dtests-no-vnodes:
+        requires:
+        - start_j11_dtests
diff --git a/CHANGES.txt b/CHANGES.txt
index 740bc21..960ed64 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,4 +1,5 @@
 4.0
+ * Support building Cassandra with JDK 11 (CASSANDRA-15108)
  * Use quilt to patch cassandra.in.sh in Debian packaging (CASSANDRA-14710)
  * Take sstable references before calculating approximate key count 
(CASSANDRA-14647)
  * Restore snapshotting of system keyspaces on version change (CASSANDRA-14412)
diff --git a/build.xml b/build.xml
index 4b23a25..4dac1a4 100644
--- a/build.xml
+++ b/build.xml
@@ -68,15 +68,6 @@
 
     <property name="doc.dir" value="${basedir}/doc"/>
 
-    <!--
-    We specify '8' instead of '1.8' in source.version to indicate that that 
this build requires Java 11 _and_ Java 8.
-    Builds that only run against Java 8, _have to_ specify '1.8' for source 
version. This makes it possible to let
-    CI scripts distinguish between "pure Java 8" releases and "hybrid" 
releases.
-    -->
-    <property name="source.version" value="8"/>
-    <property name="target.version" value="8"/>
-    <property name="release.version" value="10"/>
-
     <condition property="version" value="${base.version}">
       <isset property="release"/>
     </condition>
@@ -119,11 +110,11 @@
     <property name="jacoco.finalexecfile" 
value="${jacoco.export.dir}/jacoco.exec" />
     <property name="jacoco.version" value="0.7.5.201505241946"/>
 
-    <property name="byteman.version" value="4.0.2"/>
+    <property name="byteman.version" value="4.0.6"/>
     <property name="jamm.version" value="0.3.2"/>
     <property name="ecj.version" value="4.6.1"/>
     <property name="ohc.version" value="0.5.1"/>
-    <property name="asm.version" value="6.2"/>
+    <property name="asm.version" value="7.1"/>
 
     <!-- https://mvnrepository.com/artifact/net.openhft/chronicle-bom/1.16.23 
-->
     <property name="chronicle-queue.version" value="4.16.3" />
@@ -158,23 +149,64 @@
         }
     </script>
 
-    <!--
-    Build instructions for release builds / builds that support both Java 8 
and 11:
-    - requires JDK 11 in JAVA_HOME
-    - requires JDK 8 in JAVA8_HOME
-
-    Build instructions for development buils that only support Java 8:
-    - requires JDK 8 in JAVA_HOME
-    -->
     <condition property="java.version.8">
         <equals arg1="${ant.java.version}" arg2="1.8"/>
     </condition>
-    <condition property="java11-jvmargs" 
value="-Djdk.attach.allowAttachSelf=true --add-exports 
java.sql/java.sql=ALL-UNNAMED --add-exports 
java.base/jdk.internal.misc=ALL-UNNAMED --add-opens 
java.base/jdk.internal.module=ALL-UNNAMED --add-exports 
java.base/jdk.internal.ref=ALL-UNNAMED --add-exports 
java.base/sun.nio.ch=ALL-UNNAMED --add-exports 
java.management.rmi/com.sun.jmx.remote.internal.rmi=ALL-UNNAMED --add-exports 
java.rmi/sun.rmi.registry=ALL-UNNAMED --add-exports java.rmi/sun.r [...]
+    <condition property="java.version.11">
+        <not><isset property="java.version.8"/></not>
+    </condition>
+    <fail><condition><not><or>
+        <isset property="java.version.8"/>
+        <isset property="java.version.11"/>
+    </or></not></condition></fail>
+
+    <resources id="_jvm11_arg_items">
+        <string>-Djdk.attach.allowAttachSelf=true</string>
+
+        <string>-XX:+UseConcMarkSweepGC</string>
+        <string>-XX:+CMSParallelRemarkEnabled</string>
+        <string>-XX:SurvivorRatio=8</string>
+        <string>-XX:MaxTenuringThreshold=1</string>
+        <string>-XX:CMSInitiatingOccupancyFraction=75</string>
+        <string>-XX:+UseCMSInitiatingOccupancyOnly</string>
+        <string>-XX:CMSWaitDuration=10000</string>
+        <string>-XX:+CMSParallelInitialMarkEnabled</string>
+        <string>-XX:+CMSEdenChunksRecordAlways</string>
+
+        <string>--add-exports java.base/jdk.internal.misc=ALL-UNNAMED</string>
+        <string>--add-exports java.base/jdk.internal.ref=ALL-UNNAMED</string>
+        <string>--add-exports java.base/sun.nio.ch=ALL-UNNAMED</string>
+        <string>--add-exports 
java.management.rmi/com.sun.jmx.remote.internal.rmi=ALL-UNNAMED</string>
+        <string>--add-exports java.rmi/sun.rmi.registry=ALL-UNNAMED</string>
+        <string>--add-exports java.rmi/sun.rmi.server=ALL-UNNAMED</string>
+        <string>--add-exports java.sql/java.sql=ALL-UNNAMED</string>
+
+        <string>--add-opens java.base/java.lang.module=ALL-UNNAMED</string>
+        <string>--add-opens java.base/jdk.internal.loader=ALL-UNNAMED</string>
+        <string>--add-opens java.base/jdk.internal.ref=ALL-UNNAMED</string>
+        <string>--add-opens java.base/jdk.internal.reflect=ALL-UNNAMED</string>
+        <string>--add-opens java.base/jdk.internal.math=ALL-UNNAMED</string>
+        <string>--add-opens java.base/jdk.internal.module=ALL-UNNAMED</string>
+        <string>--add-opens 
java.base/jdk.internal.util.jar=ALL-UNNAMED</string>
+        <string>--add-opens 
jdk.management/com.sun.management.internal=ALL-UNNAMED</string>
+    </resources>
+    <pathconvert property="_jvm_args_concat" refid="_jvm11_arg_items" 
pathsep=" "/>
+    <condition property="java11-jvmargs" value="${_jvm_args_concat}" else="">
         <not>
             <equals arg1="${ant.java.version}" arg2="1.8"/>
         </not>
     </condition>
-    <property name="java11-jvmargs" value=""/>
+
+    <condition property="build.java.11">
+        <istrue value="${use.jdk11}"/>
+    </condition>
+
+    <condition property="source.version" value="8" else="11">
+        <equals arg1="${java.version.8}" arg2="true"/>
+    </condition>
+    <condition property="target.version" value="8" else="11">
+        <equals arg1="${java.version.8}" arg2="true"/>
+    </condition>
 
     <!--
          Add all the dependencies.
@@ -221,13 +253,60 @@
     </sequential>
   </macrodef>
 
+    <target name="validate-build-conf">
+        <condition property="use-jdk11">
+            <or>
+                <isset property="build.java.11"/>
+                <istrue value="${env.CASSANDRA_USE_JDK11}"/>
+            </or>
+        </condition>
+        <fail message="Inconsistent JDK11 options set">
+            <condition>
+                    <and>
+                        <istrue value="${env.CASSANDRA_USE_JDK11}"/>
+                        <isset property="use.jdk11"/>
+                        <not>
+                            <istrue value="${use.jdk11}"/>
+                        </not>
+                    </and>
+            </condition>
+                </fail>
+        <fail message="Inconsistent JDK11 options set">
+            <condition>
+                    <and>
+                        <isset property="env.CASSANDRA_USE_JDK11"/>
+                        <not>
+                            <istrue value="${env.CASSANDRA_USE_JDK11}"/>
+                        </not>
+                        <istrue value="${use.jdk11}"/>
+                    </and>
+            </condition>
+        </fail>
+        <fail message="-Duse.jdk11=true or $CASSANDRA_USE_JDK11=true cannot be 
set when building from java 8">
+            <condition>
+                <not><or>
+                    <not><isset property="java.version.8"/></not>
+                    <not><isset property="use-jdk11"/></not>
+                </or></not>
+            </condition>
+        </fail>
+        <fail message="-Duse.jdk11=true or $CASSANDRA_USE_JDK11=true must be 
set when building from java 11">
+            <condition>
+                <not><or>
+                    <isset property="java.version.8"/>
+                    <isset property="use-jdk11"/>
+                </or></not>
+            </condition>
+        </fail>
+    </target>
+
     <!--
         Setup the output directories.
     -->
-    <target name="init">
+    <target name="init" depends="validate-build-conf">
         <fail unless="is.source.artifact"
             message="Not a source artifact, stopping here." />
-        <mkdir dir="${build.classes.main}/META-INF/versions/11"/>
+        <mkdir dir="${build.classes.main}"/>
         <mkdir dir="${test.lib}"/>
         <mkdir dir="${test.classes}"/>
         <mkdir dir="${stress.test.classes}"/>
@@ -809,31 +888,13 @@
         depends="maven-ant-tasks-retrieve-build,build-project" 
description="Compile Cassandra classes"/>
     <target name="codecoverage" depends="jacoco-run,jacoco-report" 
description="Create code coverage report"/>
 
-    <target name="_build_java8" if="java.version.8">
-        <echo message="Compiling only for Java 8 ..."/>
-        <javac fork="true"
-               debug="true" debuglevel="${debuglevel}" encoding="utf-8"
-               destdir="${build.classes.main}" includeantruntime="false" 
source="8" target="8"
-               memorymaximumsize="512M">
-            <src path="${build.src.java}"/>
-            <src path="${build.src.gen-java}"/>
-            <compilerarg value="-XDignore.symbol.file"/>
-            <classpath>
-                <path refid="cassandra.classpath"/>
-            </classpath>
-        </javac>
-    </target>
-    <target name="_build_java11" unless="java.version.8">
+    <target name="_build_java">
         <!-- Note: we cannot use javac's 'release' option, as that does not 
allow accessing sun.misc.Unsafe nor
         Nashorn's ClassFilter class as any javac modules option is invalid for 
relase 8. -->
-        <fail message="JAVA8_HOME env variable must be set when building with 
java >= 11">
-            <condition><not><isset 
property="env.JAVA8_HOME"/></not></condition>
-        </fail>
-        <echo message="Compiling for Java 8 (using 
${env.JAVA8_HOME}/bin/javac) ..."/>
+        <echo message="Compiling for Java ${target.version}..."/>
         <javac fork="true"
                debug="true" debuglevel="${debuglevel}" encoding="utf-8"
-               destdir="${build.classes.main}" includeantruntime="false" 
source="8" target="8"
-               executable="${env.JAVA8_HOME}/bin/javac"
+               destdir="${build.classes.main}" includeantruntime="false" 
source="${source.version}" target="${target.version}"
                memorymaximumsize="512M">
             <src path="${build.src.java}"/>
             <src path="${build.src.gen-java}"/>
@@ -843,12 +904,12 @@
             </classpath>
         </javac>
     </target>
+
     <target 
depends="init,gen-cql3-grammar,generate-cql-html,generate-jflex-java"
             name="build-project">
         <echo message="${ant.project.name}: ${ant.file}"/>
         <!-- Order matters! -->
-        <antcall target="_build_java8"/>
-        <antcall target="_build_java11"/>
+        <antcall target="_build_java"/>
         <antcall target="createVersionPropFile"/>
         <copy todir="${build.classes.main}">
             <fileset dir="${build.src.resources}" />
@@ -1217,11 +1278,10 @@
   </target>
 
   <target name="build-test" depends="_main-jar, stress-build, fqltool-build, 
write-poms" description="Compile test classes">
-    <antcall target="_build-test_java8"/>
-    <antcall target="_build-test_java11"/>
+    <antcall target="_build-test"/>
   </target>
 
-  <target name="_build-test_java8" if="java.version.8">
+  <target name="_build-test">
     <javac
      fork="true"
      compiler="modern"
@@ -1249,35 +1309,6 @@
     </copy>
   </target>
 
-  <target name="_build-test_java11" unless="java.version.8">
-    <javac
-     fork="true"
-     compiler="modern"
-     debug="true"
-     debuglevel="${debuglevel}"
-     destdir="${test.classes}"
-     includeantruntime="true"
-     source="${source.version}"
-     target="${target.version}"
-     encoding="utf-8"
-     executable="${env.JAVA8_HOME}/bin/javac">
-     <classpath>
-        <path refid="cassandra.classpath"/>
-     </classpath>
-     <compilerarg value="-XDignore.symbol.file"/>
-     <src path="${test.unit.src}"/>
-     <src path="${test.long.src}"/>
-     <src path="${test.burn.src}"/>
-     <src path="${test.microbench.src}"/>
-     <src path="${test.distributed.src}"/>
-    </javac>
-
-    <!-- Non-java resources needed by the test suite -->
-    <copy todir="${test.classes}">
-      <fileset dir="${test.resources}"/>
-    </copy>
-  </target>
-
   <!-- Defines how to run a set of tests. If you change the defaults for 
attributes
        you should also update them in testmacro.,
        The two are split because the helper doesn't generate
@@ -1975,11 +2006,21 @@
       </java>
   </target>
 
+  <target name="_maybe_update_idea_to_java11" if="java.version.11">
+    <replace file="${eclipse.project.name}.iml" token="JDK_1_8" 
value="JDK_11"/>
+    <replace file=".idea/misc.xml" token="JDK_1_8" value="JDK_11"/>
+    <replace file=".idea/misc.xml" token="1.8" value="11"/>
+    <replaceregexp file=".idea/workspace.xml"
+                   match="name=&quot;VM_PARAMETERS&quot; 
value=&quot;(.*)&quot;"
+                   replace="name=&quot;VM_PARAMETERS&quot; value=&quot;\1 
${java11-jvmargs}&quot;"
+                   byline="true"/>
+  </target>
+
   <!-- Generate IDEA project description files -->
   <target name="generate-idea-files" depends="build-test" 
description="Generate IDEA files">
     <mkdir dir=".idea"/>
     <mkdir dir=".idea/libraries"/>
-    <copy todir=".idea">
+    <copy todir=".idea" overwrite="true">
         <fileset dir="ide/idea"/>
     </copy>
     <replace file=".idea/workspace.xml" token="trunk" 
value="${eclipse.project.name}"/>
@@ -1993,6 +2034,7 @@
     </modules>
   </component>
 </project>]]></echo>
+      <antcall target="_maybe_update_idea_to_java11"/>
   </target>
 
   <!-- Generate Eclipse project description files -->
diff --git a/conf/jvm11-clients.options b/conf/jvm11-clients.options
index 54465db..c88b7ab 100644
--- a/conf/jvm11-clients.options
+++ b/conf/jvm11-clients.options
@@ -10,12 +10,20 @@
 
 -Djdk.attach.allowAttachSelf=true
 --add-exports java.base/jdk.internal.misc=ALL-UNNAMED
---add-opens java.base/jdk.internal.module=ALL-UNNAMED
 --add-exports java.base/jdk.internal.ref=ALL-UNNAMED
 --add-exports java.base/sun.nio.ch=ALL-UNNAMED
 --add-exports java.management.rmi/com.sun.jmx.remote.internal.rmi=ALL-UNNAMED
 --add-exports java.rmi/sun.rmi.registry=ALL-UNNAMED
 --add-exports java.rmi/sun.rmi.server=ALL-UNNAMED
+--add-exports java.sql/java.sql=ALL-UNNAMED
+
+--add-opens java.base/java.lang.module=ALL-UNNAMED
+--add-opens java.base/jdk.internal.loader=ALL-UNNAMED
+--add-opens java.base/jdk.internal.ref=ALL-UNNAMED
+--add-opens java.base/jdk.internal.reflect=ALL-UNNAMED
+--add-opens java.base/jdk.internal.math=ALL-UNNAMED
+--add-opens java.base/jdk.internal.module=ALL-UNNAMED
+--add-opens java.base/jdk.internal.util.jar=ALL-UNNAMED
 --add-opens jdk.management/com.sun.management.internal=ALL-UNNAMED
 
 # The newline in the end of file is intentional
diff --git a/conf/jvm11-server.options b/conf/jvm11-server.options
index e6c2571..5fb829f 100644
--- a/conf/jvm11-server.options
+++ b/conf/jvm11-server.options
@@ -58,12 +58,20 @@
 
 -Djdk.attach.allowAttachSelf=true
 --add-exports java.base/jdk.internal.misc=ALL-UNNAMED
---add-opens java.base/jdk.internal.module=ALL-UNNAMED
 --add-exports java.base/jdk.internal.ref=ALL-UNNAMED
 --add-exports java.base/sun.nio.ch=ALL-UNNAMED
 --add-exports java.management.rmi/com.sun.jmx.remote.internal.rmi=ALL-UNNAMED
 --add-exports java.rmi/sun.rmi.registry=ALL-UNNAMED
 --add-exports java.rmi/sun.rmi.server=ALL-UNNAMED
+--add-exports java.sql/java.sql=ALL-UNNAMED
+
+--add-opens java.base/java.lang.module=ALL-UNNAMED
+--add-opens java.base/jdk.internal.loader=ALL-UNNAMED
+--add-opens java.base/jdk.internal.ref=ALL-UNNAMED
+--add-opens java.base/jdk.internal.reflect=ALL-UNNAMED
+--add-opens java.base/jdk.internal.math=ALL-UNNAMED
+--add-opens java.base/jdk.internal.module=ALL-UNNAMED
+--add-opens java.base/jdk.internal.util.jar=ALL-UNNAMED
 --add-opens jdk.management/com.sun.management.internal=ALL-UNNAMED
 
 
diff --git a/lib/asm-6.2.jar b/lib/asm-6.2.jar
deleted file mode 100644
index 792142a..0000000
Binary files a/lib/asm-6.2.jar and /dev/null differ
diff --git a/lib/asm-7.1.jar b/lib/asm-7.1.jar
new file mode 100644
index 0000000..355eb08
Binary files /dev/null and b/lib/asm-7.1.jar differ
diff --git 
a/src/java/org/apache/cassandra/cql3/functions/UDFByteCodeVerifier.java 
b/src/java/org/apache/cassandra/cql3/functions/UDFByteCodeVerifier.java
index 234aed9..8910298 100644
--- a/src/java/org/apache/cassandra/cql3/functions/UDFByteCodeVerifier.java
+++ b/src/java/org/apache/cassandra/cql3/functions/UDFByteCodeVerifier.java
@@ -84,7 +84,7 @@ public final class UDFByteCodeVerifier
     {
         String clsNameSl = clsName.replace('.', '/');
         Set<String> errors = new TreeSet<>(); // it's a TreeSet for unit tests
-        ClassVisitor classVisitor = new ClassVisitor(Opcodes.ASM5)
+        ClassVisitor classVisitor = new ClassVisitor(Opcodes.ASM7)
         {
             public FieldVisitor visitField(int access, String name, String 
desc, String signature, Object value)
             {
diff --git a/src/java/org/apache/cassandra/metrics/StreamingMetrics.java 
b/src/java/org/apache/cassandra/metrics/StreamingMetrics.java
index d220ca5..793a8c0 100644
--- a/src/java/org/apache/cassandra/metrics/StreamingMetrics.java
+++ b/src/java/org/apache/cassandra/metrics/StreamingMetrics.java
@@ -44,11 +44,25 @@ public class StreamingMetrics
 
     public static StreamingMetrics get(InetAddressAndPort ip)
     {
+       /*
+         computeIfAbsent doesn't work for this situation. Since JMX metrics 
register themselves in their ctor, we need
+         to create the metric exactly once, otherwise we'll get duplicate name 
exceptions. Although computeIfAbsent is
+         thread safe in the context of the map, it uses compare and swap to 
add the computed value to the map. This
+         means it eagerly allocates new metric instances, which can cause the 
jmx name collision we're trying to avoid
+         if multiple calls interleave. So here we use synchronized to ensure 
we only instantiate metrics exactly once.
+        */
        StreamingMetrics metrics = instances.get(ip);
        if (metrics == null)
        {
-           metrics = new StreamingMetrics(ip);
-           instances.put(ip, metrics);
+           synchronized (instances)
+           {
+               metrics = instances.get(ip);
+               if (metrics == null)
+               {
+                   metrics = new StreamingMetrics(ip);
+                   instances.put(ip, metrics);
+               }
+           }
        }
        return metrics;
     }


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