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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