"connection was forcibly closed" Exception in RPC on Windows
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         Key: HADOOP-317
         URL: http://issues.apache.org/jira/browse/HADOOP-317
     Project: Hadoop
        Type: Bug

  Components: ipc  
    Versions: 0.3.2    
    Reporter: Konstantin Shvachko


I see a lot of exceptions caused by RPC in the nightly build on Windows.
The most often is thrown by RPC on the namenode, saying

06/06/21 19:28:36 INFO ipc.Server: Server listener on port 7017: readAndProcess 
threw exception java.io.IOException: An existing connection was forcibly closed 
by the remote host. Count of bytes read: 0
java.io.IOException: An existing connection was forcibly closed by the remote 
host
    at sun.nio.ch.SocketDispatcher.read0(Native Method)
    at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:25)
    at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:233)
    at sun.nio.ch.IOUtil.read(IOUtil.java:200)
    at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:207)
    at org.apache.hadoop.ipc.Server$Connection.readAndProcess(Server.java:374)
    at org.apache.hadoop.ipc.Server$Listener.doRead(Server.java:289)
    at org.apache.hadoop.ipc.Server$Listener.run(Server.java:210)

I am not sure how serious that is, since the tests do not fail, and the name 
node does not crash.
Besides the RPC we should probably also check that the unit tests actually fail 
if they need to.


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