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From "Aaron T. Myers (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-7695) RPC.stopProxy can throw unintended exception while logging error
Date Thu, 06 Oct 2011 06:10:29 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7695?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Aaron T. Myers updated HADOOP-7695:

      Resolution: Fixed
    Hadoop Flags: Reviewed
          Status: Resolved  (was: Patch Available)

Thanks a lot for the review, Todd. I've just committed this.

Thanks also to Uma for noticing this issue.
> RPC.stopProxy can throw unintended exception while logging error
> ----------------------------------------------------------------
>                 Key: HADOOP-7695
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7695
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 0.24.0
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>             Fix For: 0.24.0
>         Attachments: HADOOP-7695.patch
> {{RPC.stopProxy}} includes the following lines in case of error:
> {code}
> LOG.error("Could not get invocation handler " + invocationHandler +
>           " for proxy " + proxy + ", or invocation handler is not closeable.");
> {code}
> Trouble is, the {{proxy}} object is usually backed by {{WritableRpcEngine}}, which will
fail in the event {{toString}} is called on one of its proxy objects. See HADOOP-7694 for
more details on that issue. Until that's addressed, we might as well change the log message
in {{RPC.stopProxy}} to not call {{toString()}} on {{proxy}}.

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