[jira] [Created] (LUCENE-4954) LuceneTestFramework fails to catch temporary FieldCache insanity

["Michael McCandless (JIRA)" <ji...@apache.org>]

Michael McCandless created LUCENE-4954:
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             Summary: LuceneTestFramework fails to catch temporary FieldCache insanity
                 Key: LUCENE-4954
                 URL: https://issues.apache.org/jira/browse/LUCENE-4954
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Michael McCandless
             Fix For: 5.0, 4.4


Ever since we added readerClosedListeners to evict FieldCache entries, LTC will no longer detect insanity as long as the test closes all readers leading to insanity ...

So this has weakened our testing of catching accidental insanity producing code.

To fix this I think we could tap into FieldCacheImpl.setInfoStream ... and ensure the test didn't print anything to it.

This was a spinoff from LUCENE-4953, where that test (AllGroupHeadsCollectorTest) is always producing insanity, but then because of a bug the FC eviction wasn't working right, and LTC then detected the insanity.

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