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https://issues.apache.org/jira/browse/LUCENE-4603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13527587#comment-13527587
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Uwe Schindler commented on LUCENE-4603:
---------------------------------------

I have seen the randomizedtesting/junit4 commit. One addition: Could we also 
print all pidStrings on startup, too? Sometimes tests don't heartbeat, but I 
still want to signal them. So along the messages:

{noformat}
[junit4:junit4] <JUnit4> says aloha! Master seed: 47E240512F1F7A09
[junit4:junit4] Executing 328 suites with 2 JVMs.
{noformat}

it could print:

{noformat}
J0: pidString; J1: pidString;...
{noformat}
                
> The test framework should report forked JVM PIDs upon heartbeats
> ----------------------------------------------------------------
>
>                 Key: LUCENE-4603
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4603
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: general/test
>            Reporter: Dawid Weiss
>            Assignee: Dawid Weiss
>            Priority: Trivial
>             Fix For: 4.1, 5.0
>
>
> This would help in getting a stack trace of a hung JVM before the timeout 
> and/or in killing the offending JVM.
> RR issue:
> https://github.com/carrotsearch/randomizedtesting/issues/135

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