PerFieldCodecWrapper.loadTermsIndex concurrency problem
-------------------------------------------------------
Key: LUCENE-3052
URL: https://issues.apache.org/jira/browse/LUCENE-3052
Project: Lucene - Java
Issue Type: Bug
Reporter: Michael McCandless
Selckin's while(1) testing on RT branch hit another error:
{noformat}
[junit] Testsuite: org.apache.lucene.TestExternalCodecs
[junit] Testcase: testPerFieldCodec(org.apache.lucene.TestExternalCodecs):
Caused an ERROR
[junit] (null)
[junit] java.lang.NullPointerException
[junit] at
org.apache.lucene.index.PerFieldCodecWrapper$FieldsReader.loadTermsIndex(PerFieldCodecWrapper.java:202)
[junit] at
org.apache.lucene.index.SegmentReader.loadTermsIndex(SegmentReader.java:1005)
[junit] at
org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:652)
[junit] at
org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:609)
[junit] at
org.apache.lucene.index.BufferedDeletesStream.applyDeletes(BufferedDeletesStream.java:276)
[junit] at
org.apache.lucene.index.IndexWriter.applyAllDeletes(IndexWriter.java:2660)
[junit] at
org.apache.lucene.index.IndexWriter.maybeApplyDeletes(IndexWriter.java:2651)
[junit] at
org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:381)
[junit] at
org.apache.lucene.index.IndexReader.open(IndexReader.java:316)
[junit] at
org.apache.lucene.TestExternalCodecs.testPerFieldCodec(TestExternalCodecs.java:541)
[junit] at
org.apache.lucene.util.LuceneTestCase$LuceneTestCaseRunner.runChild(LuceneTestCase.java:1246)
[junit] at
org.apache.lucene.util.LuceneTestCase$LuceneTestCaseRunner.runChild(LuceneTestCase.java:1175)
[junit]
[junit]
[junit] Tests run: 1, Failures: 0, Errors: 1, Time elapsed: 0.909 sec
[junit]
[junit] ------------- Standard Error -----------------
[junit] NOTE: reproduce with: ant test -Dtestcase=TestExternalCodecs
-Dtestmethod=testPerFieldCodec
-Dtests.seed=-7296204858082494534:5010909751437000758
[junit] WARNING: test method: 'testPerFieldCodec' left thread running:
merge thread: _i(4.0):Cv130 _m(4.0):Cv30 _n(4.0):cv10 into _o
[junit] RESOURCE LEAK: test method: 'testPerFieldCodec' left 1 thread(s)
running
[junit] NOTE: test params are: codec=PreFlex, locale=zh_TW,
timezone=America/Santo_Domingo
[junit] NOTE: all tests run in this JVM:
[junit] [TestDemo, TestExternalCodecs]
[junit] NOTE: Linux 2.6.37-gentoo amd64/Sun Microsystems Inc. 1.6.0_25
(64-bit)/cpus=8,threads=2,free=104153512,total=125632512
[junit] ------------- ---------------- ---------------
[junit] TEST org.apache.lucene.TestExternalCodecs FAILED
[junit] Exception in thread "Lucene Merge Thread #5"
org.apache.lucene.util.ThreadInterruptedException:
java.lang.InterruptedException: sleep interrupted
[junit] at
org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:505)
[junit] at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:472)
[junit] Caused by: java.lang.InterruptedException: sleep interrupted
[junit] at java.lang.Thread.sleep(Native Method)
[junit] at
org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:503)
[junit] ... 1 more
{noformat}
I suspect this is also a trunk issue, but I can't reproduce it yet.
I think this is happening because the codecs HashMap is changing (via another
thread), while .loadTermsIndex is called.
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