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https://issues.apache.org/jira/browse/HADOOP-7346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13044763#comment-13044763
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Hudson commented on HADOOP-7346:
--------------------------------
Integrated in Hadoop-Common-22-branch #62 (See
[https://builds.apache.org/hudson/job/Hadoop-Common-22-branch/62/])
HADOOP-7346. Send back nicer error message to clients using outdated IPC
version. Contributed by Todd Lipcon.
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1132528
Files :
* /hadoop/common/branches/branch-0.22/src/java/org/apache/hadoop/ipc/Server.java
* /hadoop/common/branches/branch-0.22/ivy/libraries.properties
*
/hadoop/common/branches/branch-0.22/src/test/core/org/apache/hadoop/ipc/TestIPC.java
* /hadoop/common/branches/branch-0.22/CHANGES.txt
* /hadoop/common/branches/branch-0.22/ivy.xml
> Send back nicer error to clients using outdated IPC version
> -----------------------------------------------------------
>
> Key: HADOOP-7346
> URL: https://issues.apache.org/jira/browse/HADOOP-7346
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 0.22.0
>
> Attachments: hadoop-7346.txt, hadoop-7346.txt, hadoop-7346.txt
>
>
> When an older Hadoop version tries to contact a newer Hadoop version across
> an IPC protocol version bump, the client currently just gets a non-useful
> error message like "EOFException".
> Instead, the IPC server code can speak just enough of prior IPC protocols to
> send back a "fatal" message indicating the version mismatch.
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