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Posted to common-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2011/06/01 03:01:55 UTC

[jira] [Created] (HADOOP-7346) Send back nicer error to clients using outdated IPC version

Send back nicer error to clients using outdated IPC version
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                 Key: HADOOP-7346
                 URL: https://issues.apache.org/jira/browse/HADOOP-7346
             Project: Hadoop Common
          Issue Type: Improvement
          Components: ipc
    Affects Versions: 0.22.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
             Fix For: 0.22.0


When an older Hadoop version tries to contact a newer Hadoop version across an IPC protocol version bump, the client currently just gets a non-useful error message like "EOFException".

Instead, the IPC server code can speak just enough of prior IPC protocols to send back a "fatal" message indicating the version mismatch.

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