Exception in thread "main" java.awt.AWTError: Can't connect to X11 window server using 'unix:0'

[bhavanisn]

Saw the X server issue while running tests on #17243
TestFailure link:
https://openj9-jenkins.osuosl.org/job/Test_openjdk8_j9_sanity.functional_ppc64_aix_Personal_testList_0/203/

Few things to note:

• The tests were running with AOT
• Running the test on other nodes succeeded.
• In the failed testcase X server was started (See Enable CRC32 to run with AOT enabled on Power #17243 for Peter's comments)

Previous issue here:
#14943

[bhavanisn]

@pshipton

[pshipton]

Also of interest is that I tried to recreate it on the machine where it failed but could not.
#17243 (comment)

I don't think it's a real problem, just some kind of temporary network/machine issue.

I'll keep this open for a while in case it's seen again.

@llxia fyi