RFR for JDK-6772009 Intermittent test failure: java/util/concurrent/locks/ReentrantLock/CancelledLockLoops.java test failed with 'Completed != 2'

David Holmes david.holmes at oracle.com
Tue Nov 19 19:03:03 UTC 2013


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On 19/11/2013 4:12 PM, srikalyan chandrashekar wrote:
> Hi all, I am working on bug JDK-6772009
> <https://bugs.openjdk.java.net/browse/JDK-6772009> .
> Root Cause:
> The timeout value gives too much grace period on faster machines on
> which the "TO BE INTERRUPTED" threads complete faster before being
> interrupted at right time.
> Suggested Fix:
> a) Decrease the timeout from 100 to 50ms which will ensure that the test
> will pass even on faster machines , and ensures the threads will be
> canceled when running and anyways there is a Barrier to ensure the test
> threads all complete gracefully.
> Miscellaneous fixes
> b) Convert result from int to long(possible integer overflow otherwise)
> c) Catch BrokenBarrierException in more granular fashion in
> ReentrantLockLoop to update and print the results (which will be missed
> otherwise)
> Add more diagnostics
> d) Assign names to threads
> e) Print which threads update the 'completed' variable.
> I have attached the webrev for convenience as the changes are
> interleaved and is best viewed as sdiff.
> Please let me know if you have any comments or suggestions.
> Thank you

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