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https://issues.apache.org/jira/browse/LUCENE-2376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12855496#action_12855496
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Shivender Devarakonda commented on LUCENE-2376:
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I have a question on this, if we have two documents in the index:
Document entrry 1 contains "field1" , "field2" "field3"
Document entry 2 contains "field1" , "field2", field4"
Shall I assume that the total unique fields in the index are 4?
We have a set of key and value pairs that we add them as fields to the
document. The set of keys must be same in most cases but might be different in
some scenarios. I need to see what actually our data contains? I will do some
research on that.
Thanks,
Shivender
> java.lang.OutOfMemoryError:Java heap space
> ------------------------------------------
>
> Key: LUCENE-2376
> URL: https://issues.apache.org/jira/browse/LUCENE-2376
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: 2.9.1
> Environment: Windows
> Reporter: Shivender Devarakonda
> Attachments: CheckIndex_JavaHeapOOM.txt,
> CheckIndex_PermGenSpaceOOM.txt, InfoStreamOutput.txt
>
>
> I see an OutOfMemory error in our product and it is happening when we have
> some data objects on which we built the index. I see the following
> OutOfmemory error, this is happening after we call Indexwriter.optimize():
> 4/06/10 02:03:42.160 PM PDT [ERROR] [Lucene Merge Thread #12] In thread
> Lucene Merge Thread #12 and the message is
> org.apache.lucene.index.MergePolicy$MergeException:
> java.lang.OutOfMemoryError: Java heap space
> 4/06/10 02:03:42.207 PM PDT [VERBOSE] [Lucene Merge Thread #12] [Manager]
> Uncaught Exception in thread Lucene Merge Thread #12
> org.apache.lucene.index.MergePolicy$MergeException:
> java.lang.OutOfMemoryError: Java heap space
> at
> org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:351)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:315)
> Caused by: java.lang.OutOfMemoryError: Java heap space
> at java.util.HashMap.resize(HashMap.java:462)
> at java.util.HashMap.addEntry(HashMap.java:755)
> at java.util.HashMap.put(HashMap.java:385)
> at org.apache.lucene.index.FieldInfos.addInternal(FieldInfos.java:256)
> at org.apache.lucene.index.FieldInfos.read(FieldInfos.java:366)
> at org.apache.lucene.index.FieldInfos.<init>(FieldInfos.java:71)
> at
> org.apache.lucene.index.SegmentReader$CoreReaders.<init>(SegmentReader.java:116)
> at org.apache.lucene.index.SegmentReader.get(SegmentReader.java:638)
> at org.apache.lucene.index.SegmentReader.get(SegmentReader.java:608)
> at
> org.apache.lucene.index.IndexWriter$ReaderPool.get(IndexWriter.java:686)
> at
> org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4979)
> at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:4614)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:235)
> at
> org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:291)
> 4/06/10 02:03:42.895 PM PDT [ERROR] this writer hit an OutOfMemoryError;
> cannot complete optimize
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