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Posted to common-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2010/04/25 21:25:50 UTC

[jira] Created: (HADOOP-6723) unchecked exceptions thrown in IPC Connection orphan clients

unchecked exceptions thrown in IPC Connection orphan clients
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                 Key: HADOOP-6723
                 URL: https://issues.apache.org/jira/browse/HADOOP-6723
             Project: Hadoop Common
          Issue Type: Bug
          Components: ipc
    Affects Versions: 0.20.2
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
            Priority: Critical
             Fix For: 0.21.0, 0.22.0


If the server sends back some malformed data, for example,  receiveResponse() can end up with an incorrect call ID. Then, when it tries to find it in the calls map, it will end up with null and throw NPE in receiveResponse. This isn't caught anywhere, so the original IPC client ends up hanging forever instead of catching an exception. Another example is if the writable implementation itself throws an unchecked exception or OOME.

We should catch Throwable in Connection.run() and shut down the connection if we catch one.

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