Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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0.17.0
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None
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None
Description
It looks like SequenceFile::RecordCompressWriter and SequenceFile::BlockCompressWriter weren't updated to use the new serialization added in HADOOP-1986. This causes failures in the merge when mapred.compress.map.output is true and mapred.map.output.compression.type=BLOCK:
java.io.IOException: File is corrupt!
at org.apache.hadoop.io.SequenceFile$Reader.readBlock(SequenceFile.java:1656)
at org.apache.hadoop.io.SequenceFile$Reader.nextRawKey(SequenceFile.java:1969)
at org.apache.hadoop.io.SequenceFile$Sorter$SegmentDescriptor.nextRawKey(SequenceFile.java:2985)
at org.apache.hadoop.io.SequenceFile$Sorter$MergeQueue.merge(SequenceFile.java:2785)
at org.apache.hadoop.io.SequenceFile$Sorter.merge(SequenceFile.java:2494)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.mergeParts(MapTask.java:654)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:740)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:212)
at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2077)
mapred.map.output.compression.type=RECORD works for Writables, but should be updated.
Attachments
Attachments
Issue Links
- blocks
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HADOOP-2919 Create fewer copies of buffer data during sort/spill
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- Closed
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