RFR for JDK-7067973: test/java/lang/management/MemoryMXBean/CollectionUsageThreshold.java hanging intermittently

Alan Bateman Alan.Bateman at oracle.com
Thu Nov 14 07:57:25 UTC 2013

If you have a preliminary patch then I would suggest bringing it to 
serviceability-dev to discuss it.


On 14/11/2013 03:17, Eric Wang wrote:
> Hi Everyone,
> I'm working on the bug https://bugs.openjdk.java.net/browse/JDK-7067973.
> It is a test bug as the test doesn't guarantee memory allocated from 
> the Old Gen, if the used memory is zero and doesn't cross the 
> threshold, no notification is sent, so both the main thread and 
> Checker thread are blocked to wait for the GC notification.
> so the suggested fix is similar as the fix ResetPeakMemoryUsage.java 
> <http://hg.openjdk.java.net/jdk8/tl/jdk/rev/a0896634ab46> to create 
> big object to make sure the old gen usage crosses the threshold and 
> run test with different GC vmoptions.
> Please let me know if you have any comments or suggestions. If you are 
> OK with the solution, I'll send a webrev in the next mail.
> Thanks,
> Eric 

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