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https://issues.apache.org/jira/browse/MAPREDUCE-2069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE moved HDFS-371 to MAPREDUCE-2069:
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Project: Hadoop Map/Reduce (was: Hadoop HDFS)
Key: MAPREDUCE-2069 (was: HDFS-371)
> Distcp setup is slow
> --------------------
>
> Key: MAPREDUCE-2069
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2069
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: distcp
> Environment: from 35 node cluster to 10 node cluster
> Reporter: Johan Oskarsson
> Priority: Minor
>
> When starting a distcp the setup phase often takes a very long time. For
> example during the distcp I just ran the setup phase took 15 minutes and the
> actual copy 3 minutes. Could this be improved? Or at least a progress bar
> added so the user doesn't think it stalled.
> I also often see exceptions like this in the setup, but the distcp finishes
> eventually.
> java.io.EOFException
> at java.io.DataInputStream.readShort(DataInputStream.java:298)
> at
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.endBlock(DFSClient.java:1672)
> at
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.close(DFSClient.java:1744)
> at
> org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:49)
> at
> org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:64)
> at
> org.apache.hadoop.io.SequenceFile$Writer.close(SequenceFile.java:774)
> at
> org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.setup(CopyFiles.java:351)
> at org.apache.hadoop.util.CopyFiles.copy(CopyFiles.java:773)
> at org.apache.hadoop.util.CopyFiles.run(CopyFiles.java:854)
> at org.apache.hadoop.util.ToolBase.doMain(ToolBase.java:187)
> at org.apache.hadoop.util.CopyFiles.main(CopyFiles.java:864)
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