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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2015/06/02 11:08:17 UTC

[jira] [Created] (HADOOP-12052) IPC client downgrades all exception types to IOE, breaks callers trying to use them

Steve Loughran created HADOOP-12052:
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             Summary: IPC client downgrades all exception types to IOE, breaks callers trying to use them
                 Key: HADOOP-12052
                 URL: https://issues.apache.org/jira/browse/HADOOP-12052
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Steve Loughran
            Priority: Critical
             Fix For: 2.8.0


The HADOOP-11772 cache changes mean that an exception such as {{UnknownHostException}} being raised on a Client connect is now being returned as a simple {{IOException}}, wrapping an {{ExecutionException}}, with the real exception being hidden inside that.

This breaks any application which uses the exception class in a try/catch statement so as to choose different actions depending on the failure mode. This has surfaced in the SLIDER-896 tests, but is likely to happen in production too.



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