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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4252) Detect/Fail tests when they leak RAM in static fields
Date Wed, 25 Jul 2012 06:45:34 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13422039#comment-13422039
] 

Uwe Schindler commented on LUCENE-4252:
---------------------------------------

Cool thing! +1 to add this check :-)
                
> Detect/Fail tests when they leak RAM in static fields
> -----------------------------------------------------
>
>                 Key: LUCENE-4252
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4252
>             Project: Lucene - Core
>          Issue Type: Test
>          Components: general/test
>            Reporter: Robert Muir
>         Attachments: LUCENE-4252.patch
>
>
> We run our junit tests without firing up a JVM each time.
> But some tests initialize lots of stuff in @BeforeClass and don't properly null it out
in an @AfterClass, which can cause a subsequent test in the same JVM to OOM, which is difficult
to debug.
> Inspiration for this was me committing Mike's cool TestPostingsFormat, which forgot to
do this: then we were seeing OOMs in several jenkins runs.
> We should try to detect these leaks in LuceneTestCase with RAMUsageEstimator and fail
the test.

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