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https://issues.apache.org/jira/browse/HDFS-1085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12888146#action_12888146
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Tsz Wo (Nicholas), SZE commented on HDFS-1085:
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BTW, thank you for commenting on this, Dmytro.
> hftp read failing silently
> ---------------------------
>
> Key: HDFS-1085
> URL: https://issues.apache.org/jira/browse/HDFS-1085
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Reporter: Koji Noguchi
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: h1085_20100713.patch
>
>
> When performing a massive distcp through hftp, we saw many tasks fail with
> {quote}
> 2010-04-06 17:56:43,005 INFO org.apache.hadoop.tools.DistCp: FAIL
> 2010/0/part-00032 : java.io.IOException: File size not matched: copied
> 193855488 bytes (184.9m) to tmpfile
> (=hdfs://omehost.com:8020/somepath/part-00032)
> but expected 1710327403 bytes (1.6g) from
> hftp://someotherhost/somepath/part-00032
> at
> org.apache.hadoop.tools.DistCp$CopyFilesMapper.copy(DistCp.java:435)
> at org.apache.hadoop.tools.DistCp$CopyFilesMapper.map(DistCp.java:543)
> at org.apache.hadoop.tools.DistCp$CopyFilesMapper.map(DistCp.java:310)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
> at org.apache.hadoop.mapred.Child.main(Child.java:159)
> {quote}
> This means that read itself didn't fail but the resulted file was somehow
> smaller.
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