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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-4252) Detect/Fail tests when they leak RAM in static fields
Date Wed, 25 Jul 2012 04:31:38 GMT
Robert Muir created LUCENE-4252:
-----------------------------------

             Summary: 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


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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