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Date: Sat, 16 May 2009 05:57:37 -0400
Message-ID: <9ac0c6aa0905160257o3ec098b9q1407b34f388649d6@mail.gmail.com>
Subject: Re: Random test failure
From: Michael McCandless <lucene@mikemccandless.com>
To: java-dev@lucene.apache.org
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MockRAMDirectory already tries to synchronize access to its openFiles
HashSet... but it must be missing somewhere.

Mike

2009/5/16 Uwe Schindler <uwe@thetaphi.de>:
> Hi Earwin,
>
> As this error occurs directly inside the HashMap and so is Java's code, I
> think this is
> a) an error in Java's HashMap implementation (haha, unlikely). But I tend=
 to
> say, Java's HashMap is correct...
> b) missing synchronization around the HashMap, so it is modified at the s=
ame
> time. So either we should use a Collections.synchronizedMap() here or
> somehow control synchronization in a different way.
>
> Uwe
>
> -----
> Uwe Schindler
> H.-H.-Meier-Allee 63, D-28213 Bremen
> http://www.thetaphi.de
> eMail: uwe@thetaphi.de
>
>> -----Original Message-----
>> From: Earwin Burrfoot [mailto:earwin@gmail.com]
>> Sent: Saturday, May 16, 2009 11:10 AM
>> To: java-dev@lucene.apache.org
>> Subject: Random test failure
>>
>> Running latest lucene trunk with some patches applied, but they do not
>> touch IndexWriter and friends anywhere.
>> Happened once, I failed to reproduce it, with and without patches.
>>
>> Java(TM) SE Runtime Environment (build 1.6.0_07-b06-153)
>> Java HotSpot(TM) 64-Bit Server VM (build 1.6.0_07-b06-57, mixed mode)
>>
>> [junit] Testsuite: org.apache.lucene.index.TestOmitTf
>> [junit] Tests run: 5, Failures: 1, Errors: 0, Time elapsed: 0.708 sec
>> [junit]
>> [junit] ------------- Standard Error -----------------
>> [junit] Exception in thread "Lucene Merge Thread #0"
>> org.apache.lucene.index.MergePolicy$MergeException:
>> java.lang.ArrayIndexOutOfBoundsException: 36
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(Co=
nc
>> urrentMergeScheduler.java:351)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(Concurr=
en
>> tMergeScheduler.java:315)
>> [junit] Caused by: java.lang.ArrayIndexOutOfBoundsException: 36
>> [junit] =9A =9A =9A at java.util.HashMap.getEntry(HashMap.java:345)
>> [junit] =9A =9A =9A at java.util.HashMap.containsKey(HashMap.java:335)
>> [junit] =9A =9A =9A at java.util.HashSet.contains(HashSet.java:184)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.store.MockRAMDirectory.createOutput(MockRAMDirectory.j=
av
>> a:212)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.FormatPostingsPositionsWriter.<init>(FormatPosti=
ng
>> sPositionsWriter.java:42)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.FormatPostingsDocsWriter.<init>(FormatPostingsDo=
cs
>> Writer.java:55)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.FormatPostingsTermsWriter.<init>(FormatPostingsT=
er
>> msWriter.java:33)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.FormatPostingsFieldsWriter.<init>(FormatPostings=
Fi
>> eldsWriter.java:59)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:485)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:140)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4808)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:4425)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMerge=
Sc
>> heduler.java:235)
>> [junit] =9A =9A =9A at
>> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(Concurr=
en
>> tMergeScheduler.java:291)
>> [junit] ------------- ---------------- ---------------
>> [junit] Testcase: testBasic(org.apache.lucene.index.TestOmitTf):
> FAILED
>> [junit] ConcurrentMergeScheduler hit unhandled exceptions
>> [junit] junit.framework.AssertionFailedError: ConcurrentMergeScheduler
>> hit unhandled exceptions
>> [junit] =9A =9A =9A at
>> org.apache.lucene.util.LuceneTestCase.tearDown(LuceneTestCase.java:55)
>> [junit]
>> [junit]
>> [junit] Test org.apache.lucene.index.TestOmitTf FAILED
>>
>>
>> --
>> Kirill Zakharenko/=EB=C9=D2=C9=CC=CC =FA=C1=C8=C1=D2=C5=CE=CB=CF (earwin=
@gmail.com)
>> Home / Mobile: +7 (495) 683-567-4 / +7 (903) 5-888-423
>> ICQ: 104465785
>>
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