streaming hang. (PipeMapRed$MROutputThread gone)
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Key: HADOOP-1154
URL: https://issues.apache.org/jira/browse/HADOOP-1154
Project: Hadoop
Issue Type: Bug
Components: contrib/streaming
Reporter: Koji Noguchi
One streaming reducer ('cat') hang,
'/bin/cat' reducer waiting in
0 S _____ 24587 24557 0 75 0 - 631 pipe_w Mar22 ? 00:00:02
/bin/cat
strace showed that it's waiting in write.
$ strace -p 24587
Process 24587 attached - interrupt to quit
write(1, "________ "..., 138 <unfinished ...>
Process 24587 detached
When I looked at the jstack of ReduceTask process, I couldn't find the
PipeMapRed$MROutputThread.
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