Michael McCandless created LUCENE-4484:
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Summary: NRTCachingDir can't handle large files
Key: LUCENE-4484
URL: https://issues.apache.org/jira/browse/LUCENE-4484
Project: Lucene - Core
Issue Type: Bug
Reporter: Michael McCandless
I dug into this OOME, which easily repros for me on rev 1398268:
{noformat}
ant test -Dtestcase=Test4GBStoredFields -Dtests.method=test
-Dtests.seed=2D89DD229CD304F5 -Dtests.multiplier=3 -Dtests.nightly=true
-Dtests.slow=true
-Dtests.linedocsfile=/home/hudson/lucene-data/enwiki.random.lines.txt
-Dtests.locale=ru -Dtests.timezone=Asia/Vladivostok -Dtests.file.encoding=UTF-8
-Dtests.verbose=true
{noformat}
The problem is the test got NRTCachingDir ... which cannot handle large files
because it decides up front (when createOutput is called) whether the file will
be in RAMDir vs wrapped dir ... so if that file turns out to be immense (which
this test does since stored fields files can grow arbitrarily huge w/o any
flush happening) then it takes unbounded RAM.
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