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

Mandy Chung mandy.chung at oracle.com
Wed Dec 18 20:35:21 UTC 2013

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?


> 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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