FAQ
hey guys,
my data nodes are logging this exception occasionally. i'm using hadoop-0.12.3.

2007-08-06 09:20:00,185 ERROR org.apache.hadoop.dfs.DataNode: DataXCeiver
java.io.IOException: Unknown opcode for incoming data stream
at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:605)
at java.lang.Thread.run(Thread.java:595)
what could possibly be causing an unknown opcode ?

thanks,
mw



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  • Arun C Murthy at Aug 6, 2007 at 7:30 pm

    On Mon, Aug 06, 2007 at 09:34:31AM -0700, moonwatcher32329@yahoo.com wrote:
    hey guys,
    my data nodes are logging this exception occasionally. i'm using hadoop-0.12.3.

    2007-08-06 09:20:00,185 ERROR org.apache.hadoop.dfs.DataNode: DataXCeiver
    java.io.IOException: Unknown opcode for incoming data stream
    at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:605)
    at java.lang.Thread.run(Thread.java:595)
    what could possibly be causing an unknown opcode ?
    I'm guessing this is the same:
    http://issues.apache.org/jira/browse/HADOOP-1119

    Has this been noticed for 0.13.0 or later? Dhruba? Raghu?

    Arun
    thanks,
    mw



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postedAug 6, '07 at 4:35p
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