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https://issues.apache.org/jira/browse/CASSANDRA-15555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17031998#comment-17031998
]
David Capwell commented on CASSANDRA-15555:
-------------------------------------------
I made sure to replicate the four different modes: success, timeout, failure,
crash; samples are shown below.
I also monitored the JVM's memory during the test and see that it grows very
slowly; old gen grows 1% every 10 seconds so takes a while to get a stop the
world GC, once that happens we drop all the way back down to 27%.
# Success
testclasslist:
[echo] Number of test runners: 1
[junit-timeout] Picked up _JAVA_OPTIONS: -Djava.net.preferIPv4Stack=true
[junit-timeout] Testsuite:
org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest
[junit-timeout] Testsuite:
org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest Tests
run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 10.988 sec
[junit-timeout]
[junitreport] Processing
/Users/davidcapwell/src/github/apache/cassandra/build/test/TESTS-TestSuites.xml
to /var/folders/cm/08cddl2s25j7fq3jdb76gh4r0000gn/T/null80285074
[junitreport] Loading stylesheet
jar:file:/usr/local/Cellar/ant/1.10.7/libexec/lib/ant-junit.jar!/org/apache/tools/ant/taskdefs/optional/junit/xsl/junit-frames.xsl
[junitreport] Transform time: 224ms
[junitreport] Deleting:
/var/folders/cm/08cddl2s25j7fq3jdb76gh4r0000gn/T/null80285074
# Failure (timeout)
[junit-timeout] Testsuite:
org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest
[junit-timeout] Testsuite:
org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest Tests
run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0 sec
[junit-timeout]
[junit-timeout] Testcase:
org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest:corruptionCausesFailure:
Caused an ERROR
[junit-timeout] Timeout occurred. Please note the time in the report does not
reflect the time until the timeout.
[junit-timeout] junit.framework.AssertionFailedError: Timeout occurred. Please
note the time in the report does not reflect the time until the timeout.
[junit-timeout] at java.util.Vector.forEach(Vector.java:1275)
[junit-timeout] at java.util.Vector.forEach(Vector.java:1275)
[junit-timeout] at java.lang.Thread.run(Thread.java:748)
[junit-timeout]
[junit-timeout]
[junit-timeout] Test
org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest
FAILED (timeout)
# Failure
... (way too much output to show here)
[junit-timeout] Seed was 121866756470991
[junit-timeout] at
org.quicktheories.core.ExceptionReporter.falsify(ExceptionReporter.java:43)
[junit-timeout] at
org.quicktheories.core.ExceptionReporter.falisification(ExceptionReporter.java:37)
[junit-timeout] at
org.quicktheories.impl.TheoryRunner.reportFalsification(TheoryRunner.java:48)
[junit-timeout] at
org.quicktheories.impl.TheoryRunner.check(TheoryRunner.java:37)
[junit-timeout] at
org.quicktheories.dsl.TheoryBuilder4.check(TheoryBuilder4.java:150)
[junit-timeout] at
org.quicktheories.dsl.TheoryBuilder4.checkAssert(TheoryBuilder4.java:162)
[junit-timeout] at
org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest.corruptionCausesFailure(ChecksummingTransformerTest.java:89)
[junit-timeout]
[junit-timeout]
[junit-timeout] Test
org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest FAILED
[junitreport] Processing
/Users/davidcapwell/src/github/apache/cassandra/build/test/TESTS-TestSuites.xml
to /var/folders/cm/08cddl2s25j7fq3jdb76gh4r0000gn/T/null958014975
[junitreport] Loading stylesheet
jar:file:/usr/local/Cellar/ant/1.10.7/libexec/lib/ant-junit.jar!/org/apache/tools/ant/taskdefs/optional/junit/xsl/junit-frames.xsl
[junitreport] Transform time: 987ms
[junitreport] Deleting:
/var/folders/cm/08cddl2s25j7fq3jdb76gh4r0000gn/T/null958014975
BUILD FAILED
# Failure with Jvm Crash
testclasslist:
[echo] Number of test runners: 1
[mkdir] Created dir:
/Users/davidcapwell/src/github/apache/cassandra/build/test/cassandra
[mkdir] Created dir:
/Users/davidcapwell/src/github/apache/cassandra/build/test/output
[junit-timeout] Picked up _JAVA_OPTIONS: -Djava.net.preferIPv4Stack=true
[junit-timeout] Testsuite:
org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest
[junit-timeout] #
[junit-timeout] # A fatal error has been detected by the Java Runtime
Environment:
[junit-timeout] #
[junit-timeout] # SIGBUS (0xa) at pc=0x000000010a7e0ad1, pid=94921,
tid=0x0000000000001103
[junit-timeout] #
[junit-timeout] # JRE version: OpenJDK Runtime Environment (8.0_222-b10) (build
1.8.0_222-b10)
[junit-timeout] # Java VM: OpenJDK 64-Bit Server VM (25.222-b10 mixed mode
bsd-amd64 compressed oops)
[junit-timeout] # Problematic frame:
[junit-timeout] # C [liblz4-java8893363888200447141.dylib+0x3ad1]
LZ4_decompress_fast+0xf1
[junit-timeout] #
[junit-timeout] # Core dump written. Default location: /cores/core or core.94921
[junit-timeout] #
[junit-timeout] # An error report file with more information is saved as:
[junit-timeout] #
/Users/davidcapwell/src/github/apache/cassandra/hs_err_pid94921.log
> Lower the amount of garbage ChecksummingTransformerTest generates by reusing
> memory
> -----------------------------------------------------------------------------------
>
> Key: CASSANDRA-15555
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15555
> Project: Cassandra
> Issue Type: Sub-task
> Components: Test/unit
> Reporter: David Capwell
> Assignee: David Capwell
> Priority: Normal
> Labels: pull-request-available
> Fix For: 4.0-alpha
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When the test finds a issue and attempts to shrink, a ton of garbage is
> generated which cause the test to then fail with GC issues. Since the test
> is a quick theories test, we can rewrite the generates to reuse memory rather
> than creating new objects for each iteration. This will also let us move
> away from String which requires multiple copies in the test and gets rid of
> the getBytes() call which is dependent on the system its called on.
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