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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3342) SocketTimeoutException in BlockSender.sendChunks could have a better error message
Date Tue, 01 May 2012 22:24:56 GMT
Todd Lipcon created HDFS-3342:
---------------------------------

             Summary: SocketTimeoutException in BlockSender.sendChunks could have a better
error message
                 Key: HDFS-3342
                 URL: https://issues.apache.org/jira/browse/HDFS-3342
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: data-node
    Affects Versions: 2.0.0
            Reporter: Todd Lipcon
            Priority: Minor


Currently, if a client connects to a DN and begins to read a block, but then stops calling
read() for a long period of time, the DN will log a SocketTimeoutException "480000 millis
timeout while waiting for channel to be ready for write." This is because there is no "keepalive"
functionality of any kind. At a minimum, we should improve this error message to be an INFO
level log which just says that the client likely stopped reading, so disconnecting it.

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