unchecked exceptions thrown in IPC Connection orphan clients
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Key: HADOOP-6723
URL: https://issues.apache.org/jira/browse/HADOOP-6723
Project: Hadoop Common
Issue Type: Bug
Components: ipc
Affects Versions: 0.20.2
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Critical
Fix For: 0.21.0, 0.22.0
If the server sends back some malformed data, for example, receiveResponse()
can end up with an incorrect call ID. Then, when it tries to find it in the
calls map, it will end up with null and throw NPE in receiveResponse. This
isn't caught anywhere, so the original IPC client ends up hanging forever
instead of catching an exception. Another example is if the writable
implementation itself throws an unchecked exception or OOME.
We should catch Throwable in Connection.run() and shut down the connection if
we catch one.
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