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https://issues.apache.org/jira/browse/HDFS-1076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12853678#action_12853678
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Suresh Srinivas commented on HDFS-1076:
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RPC server sends exception class name and printed stack trace in response. At
the client:
# if the exception is unwrapped, with the message set to the first line of
printed stack trace from response. The message is "<Server exception class
name>: <server exception message>"
#* In this case including the exception name in the message is redundant. While
unwrapping, I propose removing the "<exception class name>: " from the message.
Other than HDFSCli test I cannot think of a reason why an application depends
on the error string to include exception name, especially given that the
exception type that is thrown has that information already.
# if the exception is not unwrapped, RemoteException is thrown as it is, with
printed stack trace as the message.
#* We should retain this. The exception name here along with the stack trace
(albeit the server side) could be useful for debugging.
If we agree, I will make this change in trunk. We could retain equivalent
behavior for Avro.
> HFDS CLI error tests fail with Avro RPC
> ---------------------------------------
>
> Key: HDFS-1076
> URL: https://issues.apache.org/jira/browse/HDFS-1076
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: test
> Reporter: Doug Cutting
> Assignee: Doug Cutting
> Fix For: 0.22.0
>
> Attachments: HDFS-1076.patch
>
>
> Some HDFS command-line tests (TestHDFSCLI) fail when using AvroRpcEngine
> because the error string does not match. Calling getMessage() on a remote
> exception thrown by WritableRpcEngine produces a string that contains the
> exception name followed by its getMessage(), while exceptions thrown by
> AvroRpcEngine contain just the getMessage() string of the original exception.
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