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https://issues.apache.org/jira/browse/LUCENE-5168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15568644#comment-15568644
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Dawid Weiss commented on LUCENE-5168:
-------------------------------------

No, not much. I still have a virtualmachine where I used to reproduce this, but 
it'd require an update to the most recent openjdk, recompilation and some sweat 
to reproduce the original issue (it wasn't always reproducible).

> ByteSliceReader assert trips with 32-bit oracle 1.7.0_25 + G1GC
> ---------------------------------------------------------------
>
>                 Key: LUCENE-5168
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5168
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
>         Attachments: java8-windows-4x-3075-console.txt, log.0025, log.0042, 
> log.0078, log.0086, log.0100
>
>
> This assertion trips (sometimes from different tests), if you run the 
> highlighting tests on branch_4x with r1512807.
> It reproduces about half the time, always only with 32bit + G1GC (other 
> combinations do not seem to trip it, i didnt try looping or anything really 
> though).
> {noformat}
> rmuir@beast:~/workspace/branch_4x$ svn up -r 1512807
> rmuir@beast:~/workspace/branch_4x$ ant clean
> rmuir@beast:~/workspace/branch_4x$ rm -rf .caches #this is important,
> otherwise master seed does not work!
> rmuir@beast:~/workspace/branch_4x/lucene/highlighter$ ant test
> -Dtests.jvms=2 -Dtests.seed=EBBFA6F4E80A7365 -Dargs="-server
> -XX:+UseG1GC"
> {noformat}
> Originally showed up like this:
> {noformat}
> Build: http://jenkins.thetaphi.de/job/Lucene-Solr-4.x-Linux/6874/
> Java: 32bit/jdk1.7.0_25 -server -XX:+UseG1GC
> 1 tests failed.
> REGRESSION:  
> org.apache.lucene.search.postingshighlight.TestPostingsHighlighter.testUserFailedToIndexOffsets
> Error Message:
> Stack Trace:
> java.lang.AssertionError
>         at 
> __randomizedtesting.SeedInfo.seed([EBBFA6F4E80A7365:1FBF811885F2D611]:0)
>         at 
> org.apache.lucene.index.ByteSliceReader.readByte(ByteSliceReader.java:73)
>         at org.apache.lucene.store.DataInput.readVInt(DataInput.java:108)
>         at 
> org.apache.lucene.index.FreqProxTermsWriterPerField.flush(FreqProxTermsWriterPerField.java:453)
>         at 
> org.apache.lucene.index.FreqProxTermsWriter.flush(FreqProxTermsWriter.java:85)
>         at org.apache.lucene.index.TermsHash.flush(TermsHash.java:116)
>         at org.apache.lucene.index.DocInverter.flush(DocInverter.java:53)
>         at 
> org.apache.lucene.index.DocFieldProcessor.flush(DocFieldProcessor.java:81)
>         at 
> org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:501)
> {noformat}



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