RFR: java/util/logging/Logger/setResourceBundle/TestSetResourceBundle.java failing again

Daniel Fuchs daniel.fuchs at oracle.com
Thu Dec 19 11:04:42 UTC 2013

On 12/18/13 9:35 PM, Mandy Chung wrote:
> On 12/17/2013 3:57 AM, Daniel Fuchs wrote:
>> Hi,
>> Please find below a fix for what I believe is a test bug.
>> I plan to push this in JDK 9 dev.
>> https://bugs.openjdk.java.net/browse/JDK-8030187
>> This seems to be a very intermittent failure.
>> It looks as if a logger held in a local variable can be
>> arbitrarily garbage collected if that variable is no longer
>> used.
>> To prevent arbitrary garbage collection of such loggers, the fix
>> makes sure to use the variable again at the end of the test.
> Looks like running the test in -Xcomp and also with jtreg creates
> pressure to the young gen and more object allocation failure and so
> unreachable objects get collected in the middle of a small method body
> (like in this case).
> You added code to reference the local variables referencing the
> loggers.  Would it be simpler to have this test  just to hold a strong
> reference to the logger?

Hmmm. I don't think it would be simpler. I could have added an
array list of loggers and cleared that at the end of the test.
It would just have been another way of making sure that the
loggers weren't gc'ed.

-- daniel

> Mandy
>> In the event that my analysis were wrong, I have also added
>> some debug traces that should help if this test fails again in
>> similar situations.
>> http://cr.openjdk.java.net/~dfuchs/webrev_8030187/webrev.00/
>> best regards,
>> -- daniel

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