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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-1787) "Not enough xcievers" error should propagate to client
Date Fri, 25 Mar 2011 18:42:09 GMT
"Not enough xcievers" error should propagate to client

                 Key: HDFS-1787
                 URL: https://issues.apache.org/jira/browse/HDFS-1787
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Todd Lipcon

We find that users often run into the default transceiver limits in the DN. Putting aside
the inherent issues with xceiver threads, it would be nice if the "xceiver limit exceeded"
error propagated to the client. Currently, clients simply see an EOFException which is hard
to interpret, and have to go slogging through DN logs to find the underlying issue.

The data transfer protocol should be extended to either have a special error code for "not
enough xceivers" or should have some error code for generic errors with which a string can
be attached and propagated.

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