CorruptIndexException[checksum failed (hardware problem?) : expected=57a3b9fd actual=5e6a97f (resource=BufferedChecksumIndexInput(_3cam.fdt))]
org.apache.lucene.index.CorruptIndexException: checksum failed (hardware problem?) : expected=57a3b9fd actual=5e6a97f (resource=BufferedChecksumIndexInput(_3cam.fdt))
	at org.apache.lucene.codecs.CodecUtil.checkFooter(CodecUtil.java:211)
	at org.apache.lucene.codecs.compressing.CompressingStoredFieldsReader$ChunkIterator.checkIntegrity(CompressingStoredFieldsReader.java:521)
	at org.apache.lucene.codecs.compressing.CompressingStoredFieldsWriter.merge(CompressingStoredFieldsWriter.java:394)
	at org.apache.lucene.index.SegmentMerger.mergeFields(SegmentMerger.java:332)
	at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:100)
	at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4223)
	at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3811)
	at org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:409)
	at org.apache.lucene.index.TrackingConcurrentMergeScheduler.doMerge(TrackingConcurrentMergeScheduler.java:107)
	at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:486)