Execution of some testcases using JavaTest results in a hang occasionally. This is not consistent with a single testcase. If I execute 150 testcases which uses JavaTest and run it 3-4 times, one of those testcases hangs. The testcase fails when getLocationOnScreen is called for a testframe.

This was occuring with tiger-rc build on all platforms. It was frequently occuring on Cinnabar.

Attached is a thread dump when one testcase was hanging. Also, here is a mail from an AWT enggr on the issue:

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Hi Girish,

This is a known limitation of Swing toolkit - Swing GUI must be
initialized as well as access only on EventDispatchThread. AWT is using
parts of Swing to implement text components, and therefore this
limitation now applies to AWT as well. To workaround the problem, do all
GUI operations on EDT.

Thanks.

Denis


On Fri, 2004-09-03 at 18:26, Girish Ramachandran wrote:

> Hi Denis,
>
> I am facing an issue with some of the testcases present in our
> workspace. Some of the testcases just hangs without executing. It is not
> consistent. When I run the testcase in standalone mode, it always runs.
> When I run it using Tonga together with the entire testsuite, it hangs
> most of the time. I was able to reproduce the hang and got the thread
> dump when it hanged. Please see the attached thread dump and also the
> testcase.
>
> The testcase - RequestFocusTest.java is an applet, which uses a
> framework for running. The framework adds the applet in another applet
> and then invokes the parent applet. From the thread dump, I understand
> that the testcase was hanging when I used ProbeRobot to get the
> coordinates of a component. There are similar problems with a couple of
> other testcases also and it seems they all hang due to the same reason.
> Can you please help me in identifying the issue here? Any info you can
> give will be very much useful for me.
>
> Thanks,
> Girish

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After making the modification suggested by the enggr in the testcase and framework code, the frequency of hang got reduced. Similar code is present in JavaTest also. In AppletWrapper.java, appletrunner.show(), setVisible() and validate() method calls are made out of event dispatch thread. They should be moved to EDT.

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JavaTest 2.1.5 was used to run the tests.

###@###.### 20/Sept/2004

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