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https://issues.apache.org/jira/browse/LUCENE-6098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15998315#comment-15998315
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Joshua Humphries commented on LUCENE-6098:
------------------------------------------
This ticket hasn't been touched in over 2 years. Any updates? I saw that Oracle
has fixed https://bugs.openjdk.java.net/browse/JDK-8038348, which seems to be a
primary cause of corruption with G1. I also noticed that
https://issues.apache.org/jira/browse/LUCENE-5168, which may be related, is now
resolved.
Do Lucene tests pass yet with G1? We have a cluster where most of our machines
have pretty large heaps and are hoping G1 could help with the 99th percentile
STW pause times. But are obviously scared to try G1 if there are legit concerns
of index corruption.
> Indexwriter changecount assertion fail with g1gc
> ------------------------------------------------
>
> Key: LUCENE-6098
> URL: https://issues.apache.org/jira/browse/LUCENE-6098
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Attachments: LUCENE-6098.patch
>
>
> This failed on 1.8.0u25 G1GC and I was able to reproduce at least once, but
> not without G1.
> {noformat}
> svn co -r 1643097 https://svn.eu.apache.org/repos/asf/lucene/dev/trunk
> cd trunk/lucene/core
> ant beast -Dtestcase=TestStressDeletes -Dtests.method=test
> -Dtests.seed=C8F513C39231BFA2 -Dtests.slow=true -Dtests.locale=sk
> -Dtests.timezone=Singapore -Dtests.asserts=true
> -Dtests.file.encoding=ISO-8859-1 -Dbeast.iters=1000 -Dargs="-XX:+UseG1GC"
> -Dtests.dups=8
> {noformat}
> I am not sure this is possible to debug, but the exception is scary:
> {noformat}
> [junit4] Suite: org.apache.lucene.index.TestStressDeletes
> [junit4] 2> NOTE: reproduce with: ant test -Dtestcase=TestStressDeletes
> -Dtests.method=test -Dtests.seed=C8F513C39231BFA2 -Dtests.slow=true
> -Dtests.locale=sk -Dtests.timezone=Singapore -Dtests.asserts=true
> -Dtests.file.encoding=ISO-8859-1
> [junit4] ERROR 0.62s J5 | TestStressDeletes.test <<<
> [junit4] > Throwable #1:
> com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an
> uncaught exception in thread: Thread[id=68, name=Thread-30, state=RUNNABLE,
> group=TGRP-TestStressDeletes]
> [junit4] > at
> __randomizedtesting.SeedInfo.seed([C8F513C39231BFA2:40A12C193CCDD25A]:0)
> [junit4] > Caused by: java.lang.AssertionError:
> lastCommitChangeCount=130 changeCount=128
> [junit4] > at
> __randomizedtesting.SeedInfo.seed([C8F513C39231BFA2]:0)
> [junit4] > at
> org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4256)
> [junit4] > at
> org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2778)
> [junit4] > at
> org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2881)
> [junit4] > at
> org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2848)
> [junit4] > at
> org.apache.lucene.index.TestStressDeletes$1.run(TestStressDeletes.java:75)
> [junit4] 2> NOTE: test params are: codec=Asserting(Lucene50):
> {id=PostingsFormat(name=Direct)}, docValues:{},
> sim=RandomSimilarityProvider(queryNorm=false,coord=no): {id=DFR I(ne)B1},
> locale=sk, timezone=Singapore
> [junit4] 2> NOTE: Linux 3.13.0-35-generic amd64/Oracle Corporation
> 1.8.0_25 (64-bit)/cpus=8,threads=1,free=428019792,total=499646464
> [junit4] 2> NOTE: All tests run in this JVM: [TestOmitNorms,
> Test2BPositions, Nested2, Nested3, Nested1, Test2BPagedBytes, TestTermsEnum2,
> TestDoc, TestTwoPhaseCommitTool, TestTimSorter, TestDocTermOrdsRangeFilter,
> TestWorstCaseTestBehavior, TestBasics, TestToken, TestStressDeletes]
> [junit4] Completed on J5 in 0.70s, 1 test, 1 error <<< FAILURES!
> {noformat}
> {noformat}
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