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https://issues.apache.org/jira/browse/SUREFIRE-1631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16757109#comment-16757109
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Aaron Digulla commented on SUREFIRE-1631:
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I've attached the test case. Can someone please confirm this bug?
> Forked VM terminated without properly saying goodbye with AciveMQ
> -----------------------------------------------------------------
>
> Key: SUREFIRE-1631
> URL: https://issues.apache.org/jira/browse/SUREFIRE-1631
> Project: Maven Surefire
> Issue Type: Bug
> Components: Maven Surefire Plugin
> Affects Versions: 2.20.1, 3.0.0-M1, 2.22.0, 3.0.0-M2
> Reporter: Aaron Digulla
> Priority: Major
> Attachments: shurefire-shutdownhook-bug-0.0.1.zip
>
>
> I'm seeing spurious "The forked VM terminated without properly saying
> goodbye. VM crash or System.exit called?" messages when running unit tests in
> a big multi-module project.
> OS: Windows 10, running Maven 3.5.0 to 3.6.0 and different versions of
> Surefire (2.20.1 to 3.0.0.-M2), Java 8u171 to 8u191.
> I'm running Maven from the command line using MinTTY (Cygwin).
> Things I tried which have no effect:
> * Reboot / Cold boot (happens first thing on Monday morning when I come into
> the office and turn on my PC).
> * More free memory (happens when I only have a single window open). I have
> 16GB of RAM.
> * Different terminal. I tried CMD prompt and urxvt (Cygwin/X).
> * Different versions of the Surefire plugin or Maven
> * Different JDK 8 builds
> Things that affect the bug:
> * Redirecting Maven's stdout to a file: mvn ... | tee mvn.log
> * Redirecting all log output to a file using logback-test.xml
> * Running Surefire with forkCount=0
> * Running a subset of the tests (-Dtest=...)
> * Pending Windows updates (I think, not sure about this one).
> Counts: I've never seen it with forkCount=0 (~ 20 test builds). I've never
> seen it with redirecting log output (~ 10 builds). Redirecting sometimes
> helps but not always.
> One thing which I notice is that one of the tests creates an ActiveMQ broker
> and uses a shutdown hook to stop it. So I created a small test project which
> demonstrates that Surefire will sometimes cut off stdout. I think that
> happens because the main process kills the child after a timeout (correct?).
> So my guess would be that shutdown hooks can mess with the pipeline between
> the surefire child VM and main Maven process. ActiveMQ might be worse since
> it stops threads and execution pools (so the output comes slowly with a
> couple of exceptions sprinkled in when one component loses connection because
> another is shutting down).
> But now, it gets weird. When the build succeeds, it takes about ~5 minutes to
> run 1028 tests. The log is 25 MB.
> When it fails, it takes ~8 minutes to run ~700-800 tests (this number varies)
> and the log stops in the middle of a test but is also 25 MB.
> Some of the time discrepancy is probably because writing to a file is faster
> than printing on a terminal. The strange part is that the log file is about
> the same size but 30% of the tests haven't run. Most tests log a lot, do I
> would expect to see a difference of at least a few MB. The Maven part (which
> contains escape sequences, etc). is just 60 KB.
> Maybe the parent takes some part of the log output as "child terminated".
> I'm running out of ideas what to try next. I think a way to log the
> communication between parent and child would help. Also the parent should
> terminate the child and then read stdout until EOF to we can see anything
> that happens afterwards.
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