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From: Robert Muir <rcmuir@gmail.com>
Date: Wed, 14 May 2014 11:47:50 -0400
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Subject: Re: ConcurrentModificationException in ICU analyzer
To: java-user <java-user@lucene.apache.org>
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fyi: this bug was already found and fixed in ICU's trunk:
http://bugs.icu-project.org/trac/ticket/10767


On Wed, May 14, 2014 at 4:32 AM, Robert Muir <rcmuir@gmail.com> wrote:
> This looks like a bug in ICU? I'll try to reproduce it. We are also a
> little out of date, maybe they've already fixed it.
>
> Thank you for reporting this.
>
> On Fri, May 9, 2014 at 12:14 PM, feedly team <feedlydev@gmail.com> wrote:
>> I am using the 4.7.0 ICU analyzer (via elastic search) and noticed this
>> exception in the logs. It's sporadic. Any ideas what is going on or if this
>> is already fixed:
>>
>> java.util.ConcurrentModificationException
>>
>>         at java.util.HashMap$HashIterator.nextEntry(HashMap.java:894)
>>
>>         at java.util.HashMap$KeyIterator.next(HashMap.java:928)
>>
>>         at
>> com.ibm.icu.text.RuleBasedBreakIterator.getEngineFor(RuleBasedBreakIterator.java:1011)
>>
>>         at
>> com.ibm.icu.text.RuleBasedBreakIterator.handleNext(RuleBasedBreakIterator.java:1085)
>>
>>         at
>> com.ibm.icu.text.RuleBasedBreakIterator.next(RuleBasedBreakIterator.java:449)
>>
>>         at
>> org.apache.lucene.analysis.icu.segmentation.BreakIteratorWrapper$RBBIWrapper.next(BreakIteratorWrapper.java:96)
>>
>>         at
>> org.apache.lucene.analysis.icu.segmentation.CompositeBreakIterator.next(CompositeBreakIterator.java:60)
>>
>>         at
>> org.apache.lucene.analysis.icu.segmentation.ICUTokenizer.incrementTokenBuffer(ICUTokenizer.java:212)
>>
>>         at
>> org.apache.lucene.analysis.icu.segmentation.ICUTokenizer.incrementToken(ICUTokenizer.java:106)
>>
>>         at
>> org.apache.lucene.analysis.icu.ICUNormalizer2Filter.incrementToken(ICUNormalizer2Filter.java:80)
>>
>>         at
>> org.apache.lucene.analysis.miscellaneous.KeywordMarkerFilter.incrementToken(KeywordMarkerFilter.java:45)
>>
>>         at
>> org.apache.lucene.analysis.util.FilteringTokenFilter.incrementToken(FilteringTokenFilter.java:82)
>>
>>         at
>> org.apache.lucene.analysis.en.EnglishPossessiveFilter.incrementToken(EnglishPossessiveFilter.java:57)
>>
>>         at
>> org.apache.lucene.analysis.util.ElisionFilter.incrementToken(ElisionFilter.java:52)
>>
>>         at
>> org.apache.lucene.analysis.icu.ICUNormalizer2Filter.incrementToken(ICUNormalizer2Filter.java:80)
>>
>>         at
>> org.apache.lucene.index.DocInverterPerField.processFields(DocInverterPerField.java:182)
>>
>>         at
>> org.apache.lucene.index.DocFieldProcessor.processDocument(DocFieldProcessor.java:248)
>>
>>         at
>> org.apache.lucene.index.DocumentsWriterPerThread.updateDocument(DocumentsWriterPerThread.java:253)
>>
>>         at
>> org.apache.lucene.index.DocumentsWriter.updateDocument(DocumentsWriter.java:455)
>>
>>         at
>> org.apache.lucene.index.IndexWriter.updateDocument(IndexWriter.java:1534)
>>
>>         at
>> org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:1204)
>>
>>         at
>> org.elasticsearch.index.engine.internal.InternalEngine.innerCreate(InternalEngine.java:451)
>>
>>         at
>> org.elasticsearch.index.engine.internal.InternalEngine.create(InternalEngine.java:382)
>>
>>         at
>> org.elasticsearch.index.shard.service.InternalIndexShard.create(InternalIndexShard.java:374)
>>
>>         at
>> org.elasticsearch.action.bulk.TransportShardBulkAction.shardIndexOperation(TransportShardBulkAction.java:431)
>>
>>         at
>> org.elasticsearch.action.bulk.TransportShardBulkAction.shardOperationOnPrimary(TransportShardBulkAction.java:160)
>>
>>         at
>> org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction.performOnPrimary(TransportShardReplicationOperationAction.java:556)
>>
>>         at
>> org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction$1.run(TransportShardReplicationOperationAction.java:426)
>>
>>         at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>>
>>         at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>>
>>         at java.lang.Thread.run(Thread.java:722)

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