8316658: serviceability/jvmti/RedefineClasses/RedefineLeakThrowable.java fails intermittently

[jpbempel]

increase Metaspace size and loop count to avoid OOME in nominal case

---

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Issue

• JDK-8316658: serviceability/jvmti/RedefineClasses/RedefineLeakThrowable.java fails intermittently (Bug - P3)

Reviewers

• Coleen Phillimore (@coleenp - Reviewer) ⚠️ Review applies to 157ef53b
• David Holmes (@dholmes-ora - Reviewer)

Reviewing

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[bridgekeeper]

👋 Welcome back jpbempel! 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]

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

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[mlbridge]

Webrevs

• 01: Full - Incremental (12fda8c6)
• 00: Full (157ef53b)

[coleenp]

This seems okay if it helps the test run reliably. I don't know a better way to test the absence of a memory leak. If this fails again, maybe we need to rewrite RedefineClassHelper to only generate the class bytes once, not each time.
This is a trivial change and seems to already have David's implicit approval in the CR, so I don't think you need to wait 24 hours. You can if you want though.

[openjdk]

@jpbempel 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:

8316658: serviceability/jvmti/RedefineClasses/RedefineLeakThrowable.java fails intermittently

Reviewed-by: coleenp, dholmes

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 49 new commits pushed to the master branch:

• 83806ab: 6450193: After the first Serialization, JTableHeader does not uninstall its UI
• 2f311d5: 8316211: Open source several manual applet tests
• 65227a3: 8316389: Open source few AWT applet tests
• 788e6e1: 8316218: Open some swing tests 5
• ee9776f: 8304839: Move TestScaffold.main() to the separate class DebugeeWrapper
• 36ac839: 8073061: (fs) Files.copy(foo, bar, REPLACE_EXISTING) deletes bar even if foo is not readable
• efb7e85: 8316935: [s390x] Use consistent naming for lightweight locking in MacroAssembler
• 4e1e579: 8315920: C2: "control input must dominate current control" assert failure
• 1f7dfda: 8316671: sun/security/ssl/SSLSocketImpl/SSLSocketCloseHang.java test fails intermittent with Read timed out
• 20ff603: 8316735: Print LockStack in hs_err files
• ... and 39 more: https://git.openjdk.org/jdk/compare/7352bb910506b7d22b4d3860223fb933295eab14...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.

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[jpbempel]

Thanks!
/integrate

[openjdk]

@jpbempel
Your change (at version 157ef53) is now ready to be sponsored by a Committer.

[dholmes-ora]

Hold on! I tested a change to 17M only. Sure 24M will work fine to avoid the OOM, but does it still fail without the original fix? The boost to 1000 iterations is untested and may lead to new failures, so I will have to re-test this again before it is integrated.

[dholmes-ora]

The test still fails with these new settings. As per JBS I found 17m worked fine with the existing iterations and still caused an unfixed VM to fail. With 24M and 500 iterations the unfixed VM passes.

[dholmes-ora]

/reviewers 2

[openjdk]

@dholmes-ora
The total number of required reviews for this PR (including the jcheck configuration and the last /reviewers command) is now set to 2 (with at least 1 Reviewer, 1 Author).

[jpbempel]

On my side, 17M with 500 iterations on an unpatched VM does not fail.
That's why I have boosted the number of iterations and increased the Metaspace to magnify the leak and also avoid fixed cost of loading test infrastructure into Metaspace.
I have tested 17M/700 iterations successfully

[dholmes-ora]

Re-testing at 17M/700

[dholmes-ora]

Okay 17M/700 seems to work okay in our CI, and fails without the fix.

[jpbempel]

Thanks!
/integrate

[openjdk]

@jpbempel
Your change (at version 12fda8c) is now ready to be sponsored by a Committer.

[dholmes-ora]

/sponsor

[openjdk]

Going to push as commit 84390dd.
Since your change was applied there have been 66 commits pushed to the master branch:

• 52073b2: 8316994: Avoid modifying ClassLoader and Module objects during -Xshare:dump
• 83c0e45: 8306630: Bump minimum boot jdk to JDK 21
• d3a79b5: 8316371: Open some swing tests 6
• 750da00: 8316743: RISC-V: Change UseVectorizedMismatchIntrinsic option result to warning
• b8cec48: 8315848: G1: Rename rs_ prefix to card_rs in analytics
• 5350fd6: 8299560: Assertion failed: currentQueryIndex >= 0 && currentQueryIndex < numberOfJavaProcessesAtInitialization
• edcc559: 8316661: CompilerThread leaks CodeBlob memory when dynamically stopping compiler thread in non-product
• 1be3557: 8315721: CloseRace.java#id0 fails transiently on libgraal
• 347bd15: 8315966: Relativize initial_sp in interpreter frames
• b24ad7c: 8316924: java/lang/Thread/virtual/stress/ParkALot.java times out
• ... and 56 more: https://git.openjdk.org/jdk/compare/7352bb910506b7d22b4d3860223fb933295eab14...master

Your commit was automatically rebased without conflicts.

[openjdk]

@dholmes-ora @jpbempel Pushed as commit 84390dd.

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