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https://issues.apache.org/jira/browse/FLINK-16636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17088330#comment-17088330
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Robert Metzger edited comment on FLINK-16636 at 4/21/20, 6:17 AM:
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bq. About the memory usage, what's the total memory size for each of the 
testing Linux machines? What's the memory size each JVM requires and how many 
JVMs will run in parallel when testing?

On travis, 8 GB of main memory.

By default, surefire configures 2GB heap limit, and it runs 2 forks per CPU
See: https://github.com/apache/flink/blob/master/pom.xml#L1486 / 
https://github.com/apache/flink/blob/master/pom.xml#L99 / 
https://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html#forkCount


was (Author: rmetzger):
About the memory usage, what's the total memory size for each of the testing 
Linux machines? What's the memory size each JVM requires and how many JVMs will 
run in parallel when testing?

On travis, 8 GB of main memory.

By default, surefire configures 2GB heap limit, and it runs 2 forks per CPU
See: https://github.com/apache/flink/blob/master/pom.xml#L1486 / 
https://github.com/apache/flink/blob/master/pom.xml#L99 / 
https://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html#forkCount

> TableEnvironmentITCase is crashing on Travis
> --------------------------------------------
>
>                 Key: FLINK-16636
>                 URL: https://issues.apache.org/jira/browse/FLINK-16636
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner
>    Affects Versions: 1.11.0
>            Reporter: Jark Wu
>            Assignee: Caizhi Weng
>            Priority: Blocker
>              Labels: pull-request-available, test-stability
>             Fix For: 1.11.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Here is the instance and exception stack: 
> https://api.travis-ci.org/v3/job/663408376/log.txt
> But there is not too much helpful information there, maybe a accidental maven 
> problem.
> {code}
> 09:55:07.703 [ERROR] Failed to execute goal 
> org.apache.maven.plugins:maven-surefire-plugin:2.22.1:test 
> (integration-tests) on project flink-table-planner-blink_2.11: There are test 
> failures.
> 09:55:07.703 [ERROR] 
> 09:55:07.703 [ERROR] Please refer to 
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target/surefire-reports
>  for the individual test results.
> 09:55:07.703 [ERROR] Please refer to dump files (if any exist) [date].dump, 
> [date]-jvmRun[N].dump and [date].dumpstream.
> 09:55:07.703 [ERROR] ExecutionException The forked VM terminated without 
> properly saying goodbye. VM crash or System.exit called?
> 09:55:07.703 [ERROR] Command was /bin/sh -c cd 
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target 
> && /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java -Xms256m -Xmx2048m 
> -Dmvn.forkNumber=1 -XX:+UseG1GC -jar 
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target/surefire/surefirebooter714252487017838305.jar
>  
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target/surefire
>  2020-03-17T09-34-41_826-jvmRun1 surefire4625103637332937565tmp 
> surefire_43192129054983363633tmp
> 09:55:07.703 [ERROR] Error occurred in starting fork, check output in log
> 09:55:07.703 [ERROR] Process Exit Code: 137
> 09:55:07.703 [ERROR] Crashed tests:
> 09:55:07.703 [ERROR] org.apache.flink.table.api.TableEnvironmentITCase
> 09:55:07.703 [ERROR] 
> org.apache.maven.surefire.booter.SurefireBooterForkException: 
> ExecutionException The forked VM terminated without properly saying goodbye. 
> VM crash or System.exit called?
> 09:55:07.703 [ERROR] Command was /bin/sh -c cd 
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target 
> && /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java -Xms256m -Xmx2048m 
> -Dmvn.forkNumber=1 -XX:+UseG1GC -jar 
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target/surefire/surefirebooter714252487017838305.jar
>  
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target/surefire
>  2020-03-17T09-34-41_826-jvmRun1 surefire4625103637332937565tmp 
> surefire_43192129054983363633tmp
> 09:55:07.703 [ERROR] Error occurred in starting fork, check output in log
> 09:55:07.703 [ERROR] Process Exit Code: 137
> 09:55:07.703 [ERROR] Crashed tests:
> 09:55:07.703 [ERROR] org.apache.flink.table.api.TableEnvironmentITCase
> 09:55:07.703 [ERROR] at 
> org.apache.maven.plugin.surefire.booterclient.ForkStarter.awaitResultsDone(ForkStarter.java:510)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.booterclient.ForkStarter.runSuitesForkOnceMultiple(ForkStarter.java:382)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:297)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:246)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeProvider(AbstractSurefireMojo.java:1183)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeAfterPreconditionsChecked(AbstractSurefireMojo.java:1011)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.AbstractSurefireMojo.execute(AbstractSurefireMojo.java:857)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)
> 09:55:07.704 [ERROR] at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)
> 09:55:07.704 [ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
> Method)
> 09:55:07.704 [ERROR] at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 09:55:07.704 [ERROR] at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 09:55:07.704 [ERROR] at java.lang.reflect.Method.invoke(Method.java:498)
> 09:55:07.704 [ERROR] at 
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
> 09:55:07.704 [ERROR] at 
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
> 09:55:07.704 [ERROR] at 
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
> 09:55:07.704 [ERROR] at 
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
> 09:55:07.704 [ERROR] Caused by: 
> org.apache.maven.surefire.booter.SurefireBooterForkException: The forked VM 
> terminated without properly saying goodbye. VM crash or System.exit called?
> 09:55:07.704 [ERROR] Command was /bin/sh -c cd 
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target 
> && /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java -Xms256m -Xmx2048m 
> -Dmvn.forkNumber=1 -XX:+UseG1GC -jar 
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target/surefire/surefirebooter714252487017838305.jar
>  
> /home/travis/build/apache/flink/flink-table/flink-table-planner-blink/target/surefire
>  2020-03-17T09-34-41_826-jvmRun1 surefire4625103637332937565tmp 
> surefire_43192129054983363633tmp
> 09:55:07.704 [ERROR] Error occurred in starting fork, check output in log
> 09:55:07.704 [ERROR] Process Exit Code: 137
> 09:55:07.704 [ERROR] Crashed tests:
> 09:55:07.704 [ERROR] org.apache.flink.table.api.TableEnvironmentITCase
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:669)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.booterclient.ForkStarter.access$600(ForkStarter.java:115)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.booterclient.ForkStarter$1.call(ForkStarter.java:371)
> 09:55:07.704 [ERROR] at 
> org.apache.maven.plugin.surefire.booterclient.ForkStarter$1.call(ForkStarter.java:347)
> 09:55:07.704 [ERROR] at 
> java.util.concurrent.FutureTask.run(FutureTask.java:266)
> 09:55:07.704 [ERROR] at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> 09:55:07.704 [ERROR] at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> 09:55:07.704 [ERROR] at java.lang.Thread.run(Thread.java:748)
> 09:55:07.704 [ERROR] -> [Help 1]
> 09:55:07.704 [ERROR] 
> 09:55:07.704 [ERROR] To see the full stack trace of the errors, re-run Maven 
> with the -e switch.
> 09:55:07.704 [ERROR] Re-run Maven using the -X switch to enable full debug 
> logging.
> 09:55:07.704 [ERROR] 
> 09:55:07.704 [ERROR] For more information about the errors and possible 
> solutions, please read the following articles:
> 09:55:07.704 [ERROR] [Help 1] 
> http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
> 09:55:07.704 [ERROR] 
> 09:55:07.704 [ERROR] After correcting the problems, you can resume the build 
> with the command
> 09:55:07.704 [ERROR]   mvn <goals> -rf :flink-table-planner-blink_2.11
> {code}



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