Failed tests delete diagnostic (core/trace/javacore) files (or moved to an unknown location)

[JasonFengJ9]

Summary of problem

As mentioned at #5399 (comment), in this particular test OpenJDK Regression suite jdk_util, the diagnostic files such as system core, snap trace and javacore disappeared from the location specified within console output.

Applying Ctrl-C to stop the test could make the diagnostic files available. So the diagnostic files were generated but were deleted quickly (or moved to an un-specific location).

fyi @smlambert

[smlambert]

Thanks @JasonFengJ9 - yes, we have learned we need to use the --retain command line option with the underlying openjdk/jtreg framework in order to not have the framework quickly delete these files from the scratch folder. We are updating the WIP PR that will capture contents of scratch folder to accommodate this.

[llxia]

@smlambert and @JasonFengJ9 you are both correct.

From my local testing, the files got moved out of scratch folder even with -retain:fail,error,*.dmp,javacore.*,*.trc,*.phd.

Output:

[2019-04-11 14:13:48,293] Agent[8]: stderr: JVMDUMP032I JVM requested System dump using '/Users/lanxia/tmp/test/jvmtest/openjdk_regression/work/scratch/5/core.20190411.141348.43289.0001.dmp' in response to an event
[2019-04-11 14:13:52,013] Agent[8]: stderr: JVMDUMP010I System dump written to /Users/lanxia/tmp/test/jvmtest/openjdk_regression/work/scratch/5/core.20190411.141348.43289.0001.dmp
[2019-04-11 14:13:52,014] Agent[8]: stderr: JVMDUMP032I JVM requested Java dump using '/Users/lanxia/tmp/test/jvmtest/openjdk_regression/work/scratch/5/javacore.20190411.141348.43289.0002.txt' in response to an event
[2019-04-11 14:13:52,334] Agent[8]: stderr: JVMDUMP010I Java dump written to /Users/lanxia/tmp/test/jvmtest/openjdk_regression/work/scratch/5/javacore.20190411.141348.43289.0002.txt
[2019-04-11 14:13:52,334] Agent[8]: stderr: JVMDUMP032I JVM requested Snap dump using '/Users/lanxia/tmp/test/jvmtest/openjdk_regression/work/scratch/5/Snap.20190411.141348.43289.0003.trc' in response to an event
[2019-04-11 14:13:52,443] Agent[8]: stderr: JVMDUMP010I Snap dump written to /Users/lanxia/tmp/test/jvmtest/openjdk_regression/work/scratch/5/Snap.20190411.141348.43289.0003.trc

system core, snap trace and javacore are actually located at work/java/...

Lans-MacBook-Pro:openjdk_regression lanxia$ find . -name *.dmp
./work/java/util/jar/JarFile/mrjar/MultiReleaseJarHttpProperties/core.20190411.141348.43289.0001.dmp
./work/java/util/ResourceBundle/Bug4168625Test/core.20190411.141630.43279.0001.dmp

I will create a PR soon to point workDir to TKG reportDir and update -retain cmd, so that diagnostic files are archived.

Reference links:
https://openjdk.java.net/jtreg/command-help.html
https://openjdk.java.net/jtreg/faq.html#scratch-directory