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https://issues.apache.org/jira/browse/HADOOP-1624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12513787
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Konstantin Shvachko commented on HADOOP-1624:
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+1
> Unknown op code exception in DataXceiver.
> -----------------------------------------
>
> Key: HADOOP-1624
> URL: https://issues.apache.org/jira/browse/HADOOP-1624
> Project: Hadoop
> Issue Type: Bug
> Affects Versions: 0.14.0
> Reporter: Konstantin Shvachko
> Assignee: Raghu Angadi
> Priority: Blocker
> Fix For: 0.14.0
>
> Attachments: HADOOP-1624.patch
>
>
> There is a missing break statement in DataNode.DataXceiver.run() which sends
> DataXceiver into an infinite loop printing
> Faulty op: 82
> 07/07/17 17:52:04 ERROR dfs.DataNode: DataXCeiver
> java.io.IOException: Unknown opcode 82in data stream
> at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:742)
> at java.lang.Thread.run(Thread.java:595)
> Consequence of HADOOP-1134.
> Also a printout two lines below seems unnecessary.
> And another three lines below
> LOG.error("DataXCeiver", t);
> should be spelled DataXceiver
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