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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-2971) SocketTimeoutException in unit tests
Date Fri, 07 Mar 2008 21:43:46 GMT
SocketTimeoutException in unit tests

                 Key: HADOOP-2971
                 URL: https://issues.apache.org/jira/browse/HADOOP-2971
             Project: Hadoop Core
          Issue Type: Bug
          Components: io
    Affects Versions: 0.17.0
            Reporter: Raghu Angadi
            Assignee: Raghu Angadi

TestJobStatusPersistency failed and contained DataNode stacktraces similar to the following

2008-03-07 21:27:00,410 ERROR dfs.DataNode (DataNode.java:run(976)) -
java.net.SocketTimeoutException: 0 millis 
timeout while waiting for Unknown Addr (local: / to be ready for read
        at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:188)
        at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:135)
        at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:121)
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
        at java.io.DataInputStream.readInt(DataInputStream.java:370)
        at org.apache.hadoop.dfs.DataNode$BlockReceiver.receiveBlock(DataNode.java:2434)
        at org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:1170)
        at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:953)
        at java.lang.Thread.run(Thread.java:619)

This is mostly related to HADOOP-2346. The error is strange. socket.getRemoteSocketAddress()
returned null implying this socket is not connected yet. But we have already read a few bytes
from it!.

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