RFR: 8146435: [TESTBUG] Logging tests are failing intermittently on windows when executed by JPRT

David Holmes david.holmes at oracle.com
Wed Jan 13 02:45:37 UTC 2016

I agree with Ioi. This is similar to the monitor inflation/deflation 
logging test - we need to ensure we use something guaranteed to always 
generate the expected log output.


On 13/01/2016 11:50 AM, Ioi Lam wrote:
> Rachel,
> I don't think adding "-Xshare:off" is the correct fix. For example,
> ItablesTest.java just runs "java -version", and depends on the fact that
> at least one of the JDK classes that are implicitly loaded has an itable
> (or whatever contents that produces the "vtable index " output).
> This behavior depends on internal JDK implementation and there's no
> guarantee that it will always be true. There's also no guarantee that
> the behavior will be the same across all the OS ports.
> In the future, some changes of "java -version" may cause this test to
> fail only on a particular platform. I don't want someone to spend a day
> to track down some imaginative windows issues again just to find out
> that it's a test bug.
> So, as I mentioned in the bug report, the tests should be written to
> load a class that *you have written* to ensure that the output will be
> there regardless of JDK implementation.
> Here are other cases where the tests are dependent on unspecified
> behaviors:
>       out.shouldContain("[Initialized").shouldContain("without side
> effects]");
>       All of the output in DefaultMethodsTest.java
> In fact, I think you should remove "-Xshare:off" from the tests. Adding
> -Xshare:off will also force the tests to be executed with CDS disabled,
> and would cover up problems that only show up when CDS is enabled.
> Thanks
> - Ioi
> On 1/12/16 10:27 AM, Rachel Protacio wrote:
>> Hello!
>> Please review this fix which adds "-Xshare:off" to all UL tests'
>> ProcessBuilders to prevent windows failures. Extreme thanks to Ioi for
>> debugging and finding the source of the problem.
>> Open webrev: http://cr.openjdk.java.net/~rprotacio/8146435/
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8146435
>> Tests sent to JPRT, pass on all platforms.
>> Thank you!
>> Rachel

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