8209595: MonitorVmStartTerminate.java timed out

[kevinjwalls]

From studying test failures, it looks like the way the test identifies its related processes is failing.
It checks the mainArgs of a process by attaching, and looks like it occasionally misses getting a valid match. The hasMainArgs method ignores exceptions as it is expecting some exceptions: it is going to test unrelated java process which happen to start.

It should retry this main args check on failure, but not too many times to be a burden on other valid unrelated processes, and should also log the PIDs that have an issue so we can see if this is part of any future failure.

Other small logging changes so we can see more easily the progress through the test.

---

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Issue

• JDK-8209595: MonitorVmStartTerminate.java timed out (Bug - P4)

Reviewers

• Serguei Spitsyn (@sspitsyn - Reviewer) ⚠️ Review applies to 8501c23c
• Chris Plummer (@plummercj - Reviewer)
• Leonid Mesnik (@lmesnik - Reviewer)

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[bridgekeeper]

👋 Welcome back kevinw! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@kevinjwalls The following label will be automatically applied to this pull request:

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[mlbridge]

Webrevs

• 01: Full - Incremental (9b198276)
• 00: Full (8501c23c)

[sspitsyn]

Looks good.
Placed a couple of nits.
Thanks,
Serguei

[sspitsyn]

Nit: I'm thinking if moving this after line 197 would be more clear.

[kevinjwalls]

Eventually I did reproduce a further failure with these test changes, where hasMainArgs is the issue.
For a valid test pid, we got the main args, and they did not match, but we know they SHOULD have due to the additional logging.

MonitoredVmUtil.mainArgs(target) can return "Unknown" or null, so we need to handle this, and not presume that the PID is NOT a test process. We should retry the main args fetch if (monitoredArgs == null || monitoredArgs.equals("Unknown"))

Also, takeNap and the 100ms delay:
This can thrash and just fill logs with 10,000 lines of messages when failing.
Maybe it was short to reduce latency, but that does not seem criticial. Make it longer.

[openjdk]

@kevinjwalls This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8209595: MonitorVmStartTerminate.java timed out

Reviewed-by: sspitsyn, cjplummer, lmesnik

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At the time when this comment was updated there had been 35 new commits pushed to the master branch:

• 8065233: 8318598: FFM stylistic cleanups
• b1228de: 8314588: gc/metaspace/TestMetaspaceInitialization.java failed "assert(capacity_until_gc >= committed_bytes) failed: capacity_until_gc: 3145728 < committed_bytes: 3211264"
• 5a97411: 8317971: RISC-V: implement copySignF/D and signumF/D intrinsics
• 9144287: 8318601: Remove javadoc text about restricted methods
• 4010642: 8077371: Binary files in JAXP test should be removed
• fe52917: 8318457: Use prefix-less prepend methods directly to reduce branches in String concat expressions
• 71c99a0: 8318448: Link PopupMenu/PopupMenuLocation.java failure to JDK-8259913
• 2c23391: 8318101: Additional test cases for CSSAttributeEqualityBug
• deadb9c: 8304684: Memory leak in DirectivesParser::set_option_flag
• a03767c: 8318049: C2: assert(!failure) failed: Missed optimization opportunity in PhaseIterGVN
• ... and 25 more: https://git.openjdk.org/jdk/compare/47bb1a1cefa242c39c22a8f2aa08d7d357c260b9...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[kevinjwalls]

Thanks for the updated approvals, let's get this integrated...

[kevinjwalls]

/integrate

[openjdk]

Going to push as commit a045258.
Since your change was applied there have been 38 commits pushed to the master branch:

• 2121575: 8318421: AbstractPipeline.sourceStageSpliterator() chases pointers needlessly
• 200b5a2: 8318420: AbstractPipeline invokes overridden method in constructor
• 5281499: 8316563: test tools/jpackage/linux/LinuxResourceTest.java fails on CentOS Linux release 8.5.2111 and Fedora 27
• 8065233: 8318598: FFM stylistic cleanups
• b1228de: 8314588: gc/metaspace/TestMetaspaceInitialization.java failed "assert(capacity_until_gc >= committed_bytes) failed: capacity_until_gc: 3145728 < committed_bytes: 3211264"
• 5a97411: 8317971: RISC-V: implement copySignF/D and signumF/D intrinsics
• 9144287: 8318601: Remove javadoc text about restricted methods
• 4010642: 8077371: Binary files in JAXP test should be removed
• fe52917: 8318457: Use prefix-less prepend methods directly to reduce branches in String concat expressions
• 71c99a0: 8318448: Link PopupMenu/PopupMenuLocation.java failure to JDK-8259913
• ... and 28 more: https://git.openjdk.org/jdk/compare/47bb1a1cefa242c39c22a8f2aa08d7d357c260b9...master

Your commit was automatically rebased without conflicts.

[openjdk]

@kevinjwalls Pushed as commit a045258.

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