On a Hadoop 2.4.0 cluster, I have a job running that's encountering the following warnings in one of its map tasks (IPs changed, but otherwise, this is verbatim):
--- 2015-03-16 06:59:37,994 WARN [ResponseProcessor for block BP-437460642-10.0.0.1-1391018641114:blk_1084609656_11045296] org.apache.hadoop.hdfs.DFSClient: DFSOutputStream ResponseProcessor exception for block BP-437460642-10.0.0.1-1391018641114:blk_1084609656_11045296 java.io.EOFException: Premature EOF: no length prefix available at org.apache.hadoop.hdfs.protocolPB.PBHelper.vintPrefixed(PBHelper.java:1990) at org.apache.hadoop.hdfs.protocol.datatransfer.PipelineAck.readFields(PipelineAck.java:176) at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer$ResponseProcessor.run(DFSOutputStream.java:796) 2015-03-16 06:59:37,994 WARN [ResponseProcessor for block BP-437460642-10.0.0.1-1391018641114:blk_1084609655_11045295] org.apache.hadoop.hdfs.DFSClient: DFSOutputStream ResponseProcessor exception for block BP-437460642-10.0.0.1-1391018641114:blk_1084609655_11045295 java.io.IOException: Bad response ERROR for block BP-437460642-10.0.0.1-1391018641114:blk_1084609655_11045295 from datanode 10.0.0.1:1019 at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer$ResponseProcessor.run(DFSOutputStream.java:819) --- This job is launched from Hive 0.13.0, and it's consistently happening on the same split, which is on a sequence file. After logging a few errors like the above, the map task seems to make no progress and eventually times out (with a mapreduce.task.timeout value greater than 5 hours). Any pointers on how to begin troubleshooting and resolving this issue? In searching around, it was suggested that this is indicative of a "network issue", but as it happens on the same split consistently, that explanation seems unlikely.
