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https://issues.apache.org/jira/browse/LUCENE-5899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Hoss Man updated LUCENE-5899:
-----------------------------
Description:
User report of bizare ClassCastException when running some lucene code with the
(experimental) shenandoah GC
{code}
Exception in thread "Lucene Merge Thread #0"
org.apache.lucene.index.MergePolicy$MergeException:
java.lang.ClassCastException: org.apache.lucene.codecs.MappingMultiDocsEnum
cannot be cast to org.apache.lucene.index.DocsAndPositionsEnum
at
org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:545)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:518)
Caused by: java.lang.ClassCastException:
org.apache.lucene.codecs.MappingMultiDocsEnum cannot be cast to
org.apache.lucene.index.DocsAndPositionsEnum
at
org.apache.lucene.codecs.PostingsConsumer.merge(PostingsConsumer.java:127)
at org.apache.lucene.codecs.TermsConsumer.merge(TermsConsumer.java:110)
at org.apache.lucene.codecs.FieldsConsumer.merge(FieldsConsumer.java:72)
at
org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:399)
at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:112)
at
org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4163)
at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3759)
at
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:405)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:482)
{code}
was:
Exception in thread "Lucene Merge Thread #0"
org.apache.lucene.index.MergePolicy$MergeException:
java.lang.ClassCastException: org.apache.lucene.codecs.MappingMultiDocsEnum
cannot be cast to org.apache.lucene.index.DocsAndPositionsEnum
at
org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:545)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:518)
Caused by: java.lang.ClassCastException:
org.apache.lucene.codecs.MappingMultiDocsEnum cannot be cast to
org.apache.lucene.index.DocsAndPositionsEnum
at
org.apache.lucene.codecs.PostingsConsumer.merge(PostingsConsumer.java:127)
at org.apache.lucene.codecs.TermsConsumer.merge(TermsConsumer.java:110)
at org.apache.lucene.codecs.FieldsConsumer.merge(FieldsConsumer.java:72)
at
org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:399)
at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:112)
at
org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4163)
at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3759)
at
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:405)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:482)
Priority: Minor (was: Major)
Environment:
I test lucene on shenandoah with big memory + bigdata(32g, 128g).
http://openjdk.java.net/jeps/189
http://icedtea.classpath.org/hg/shenandoah/
Fix Version/s: (was: 4.10)
Summary: shenandoah GC can cause "ClassCastException:
org.apache.lucene.codecs.MappingMultiDocsEnum cannot be cast to
org.apache.lucene.index.DocsAndPositionsEnum" (was: Caused by:
java.lang.ClassCastException: org.apache.lucene.codecs.MappingMultiDocsEnum
cannot be cast to org.apache.lucene.index.DocsAndPositionsEnum)
I've updated the summary & description to make it more clear what circumstances
this happens in.
Littlestar: it would be very helpful if you could provide some explicit details
on what exactly you mean by "test lucene" ... is this test code you wrote? were
you running "ant test" from the lucene distribution? ... which test threw this
exception? does it reproduce reliably?
if you do open a JDK bug regarding this, please link to this issue, and then
post the resulting bug # back here as a comment as well.
> shenandoah GC can cause "ClassCastException:
> org.apache.lucene.codecs.MappingMultiDocsEnum cannot be cast to
> org.apache.lucene.index.DocsAndPositionsEnum"
> ----------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-5899
> URL: https://issues.apache.org/jira/browse/LUCENE-5899
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/codecs
> Affects Versions: 4.9
> Environment: I test lucene on shenandoah with big memory +
> bigdata(32g, 128g).
> http://openjdk.java.net/jeps/189
> http://icedtea.classpath.org/hg/shenandoah/
> Reporter: Littlestar
> Priority: Minor
>
> User report of bizare ClassCastException when running some lucene code with
> the (experimental) shenandoah GC
> {code}
> Exception in thread "Lucene Merge Thread #0"
> org.apache.lucene.index.MergePolicy$MergeException:
> java.lang.ClassCastException: org.apache.lucene.codecs.MappingMultiDocsEnum
> cannot be cast to org.apache.lucene.index.DocsAndPositionsEnum
> at
> org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:545)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:518)
> Caused by: java.lang.ClassCastException:
> org.apache.lucene.codecs.MappingMultiDocsEnum cannot be cast to
> org.apache.lucene.index.DocsAndPositionsEnum
> at
> org.apache.lucene.codecs.PostingsConsumer.merge(PostingsConsumer.java:127)
> at org.apache.lucene.codecs.TermsConsumer.merge(TermsConsumer.java:110)
> at org.apache.lucene.codecs.FieldsConsumer.merge(FieldsConsumer.java:72)
> at
> org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:399)
> at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:112)
> at
> org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4163)
> at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3759)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:405)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:482)
> {code}
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