java.io.EOFException: read past EOF: MMapIndexInput [slice=_342.fdx] [LUCENE-6934]

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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Migrated from [LUCENE-6934](https://issues.apache.org/jira/browse/LUCENE-6934) by Tejas Jethva, updated Dec 18 2015