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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12410) Zombie hunting tips!
Date Mon, 03 Nov 2014 04:48:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14194243#comment-14194243
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stack commented on HBASE-12410:
-------------------------------

Above comments are from tail of HBASE-12219

> Zombie hunting tips!
> --------------------
>
>                 Key: HBASE-12410
>                 URL: https://issues.apache.org/jira/browse/HBASE-12410
>             Project: HBase
>          Issue Type: Brainstorming
>            Reporter: stack
>
> Here are some tips from Mr Charlton Heston (@dima spivak) and World War Z Brad Pitt ([~apurtell]),
famous Zombie killers, on how to figure why tests are hanging:
> bq. Set  -Dsurefire.timeout=0 to the mvn command which sets the process timeout to unlimited.
> Above is good for figuring what is sticking around.
> bq. When hunting zombies locally you can also set the first part and second part fork
modes to "always" so each test runs in its own VM, then loop the unit test suite, watch for
stragglers, then jstack. Works well because you can be sure every stack in the dump is relevant
for the hung test.
> Lets keep this issue open and add tips for tests for nailing those that won't die.



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