Tejas Jethva created LUCENE-6934:
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             Summary: java.io.EOFException: read past EOF: MMapIndexInput 
[slice=_342.fdx]
                 Key: LUCENE-6934
                 URL: https://issues.apache.org/jira/browse/LUCENE-6934
             Project: Lucene - Core
          Issue Type: Bug
          Components: core/index
    Affects Versions: 4.2
            Reporter: Tejas Jethva


We are getting following exception when we are trying to commit the changes 
done on the index.

java.io.EOFException: read past EOF: 
MMapIndexInput(path="<cache-directory>/_342.cfs") [slice=_342.fdx]
        at 
org.apache.lucene.store.ByteBufferIndexInput.readByte(ByteBufferIndexInput.java:78)
        at org.apache.lucene.store.DataInput.readInt(DataInput.java:84)
        at 
org.apache.lucene.store.ByteBufferIndexInput.readInt(ByteBufferIndexInput.java:129)
        at org.apache.lucene.codecs.CodecUtil.checkHeader(CodecUtil.java:126)
        at 
org.apache.lucene.codecs.compressing.CompressingStoredFieldsReader.<init>(CompressingStoredFieldsReader.java:102)
        at 
org.apache.lucene.codecs.compressing.CompressingStoredFieldsFormat.fieldsReader(CompressingStoredFieldsFormat.java:113)
        at 
org.apache.lucene.index.SegmentCoreReaders.<init>(SegmentCoreReaders.java:147)
        at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:56)
        at 
org.apache.lucene.index.ReadersAndLiveDocs.getReader(ReadersAndLiveDocs.java:121)
        at 
org.apache.lucene.index.BufferedDeletesStream.applyDeletes(BufferedDeletesStream.java:216)
        at 
org.apache.lucene.index.IndexWriter.applyAllDeletes(IndexWriter.java:2961)
        at 
org.apache.lucene.index.IndexWriter.maybeApplyDeletes(IndexWriter.java:2952)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2692)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2827)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2807)


This is the exception when we tried to close after commit failed:

java.io.FileNotFoundException: <cache-directory>/_342.cfs (No such file or 
directory)
        at java.io.RandomAccessFile.open(Native Method)
        at java.io.RandomAccessFile.<init>(RandomAccessFile.java:241)
        at 
org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:193)
        at 
org.apache.lucene.store.MMapDirectory.createSlicer(MMapDirectory.java:203)
        at 
org.apache.lucene.store.CompoundFileDirectory.<init>(CompoundFileDirectory.java:102)
        at 
org.apache.lucene.index.SegmentCoreReaders.<init>(SegmentCoreReaders.java:116)
        at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:56)
        at 
org.apache.lucene.index.ReadersAndLiveDocs.getReader(ReadersAndLiveDocs.java:121)
        at 
org.apache.lucene.index.BufferedDeletesStream.applyDeletes(BufferedDeletesStream.java:216)
        at 
org.apache.lucene.index.IndexWriter.applyAllDeletes(IndexWriter.java:2961)
        at 
org.apache.lucene.index.IndexWriter.maybeApplyDeletes(IndexWriter.java:2952)
        at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:2925)
        at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:2894)
        at 
org.apache.lucene.index.IndexWriter.closeInternal(IndexWriter.java:928)
        at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:883)
        at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:845)

Could you please point us what might be possible cause of this?



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