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https://issues.apache.org/jira/browse/MAHOUT-1345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13836092#comment-13836092
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Dawid Weiss commented on MAHOUT-1345:
-------------------------------------
{code}
Thread[id=108, name=pool-8-thread-8, state=TERMINATED, group={null group}]
{code}
Probably a slower system -- the thread is in TERMINATED state but not dead yet.
Add some lingering to MahoutTestCase (it also configures other stuff):
{code}
/**
* Superclass of all Mahout test cases.
*/
@ThreadLeakScope(Scope.SUITE)
@ThreadLeakAction({Action.WARN, Action.INTERRUPT})
@ThreadLeakLingering(linger = 20000) // Wait a bit longer for leaked threads to
die.
@ThreadLeakZombies(Consequence.IGNORE_REMAINING_TESTS)
@TimeoutSuite(millis = 2 * TimeUnits.HOUR)
public abstract class MahoutTestCase extends RandomizedTest {
...
{code}
> Enable randomised testing for all Mahout modules
> ------------------------------------------------
>
> Key: MAHOUT-1345
> URL: https://issues.apache.org/jira/browse/MAHOUT-1345
> Project: Mahout
> Issue Type: Improvement
> Affects Versions: 0.8
> Reporter: Isabel Drost-Fromm
> Assignee: Suneel Marthi
> Priority: Minor
> Fix For: 0.9
>
> Attachments: MAHOUT-1345.diff, MAHOUT-1345.patch
>
>
> When enabling randomised testing for all modules I found a few tests became
> unstable or even fail deterministically due to lingering threads. The
> attached patch:
> * defines the randomised testing dependency in our parent pom
> * re-uses said dependencies in all depending modules (makes upgrading easier
> as the version number needs to be changed in just one place)
> * adds several code changes that fixed the failures due to lingering threads
> for me on my machine. I'd greatly appreciate input a) from those who wrote
> the respective code and b) others who ran the tests with these changes to
> make sure there are no other tests that suffer from the same issues.
> Warning: I touched quite a few bits and pieces I'm not intimately familiar
> with over the last few weeks (whenever I had a few spare minutes) - second
> pair of eyes needed.
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