Improve log levels when exceptions caught in RPC handler
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Key: HADOOP-7358
URL: https://issues.apache.org/jira/browse/HADOOP-7358
Project: Hadoop Common
Issue Type: Improvement
Components: ipc
Affects Versions: 0.22.0
Reporter: Todd Lipcon
Priority: Minor
Fix For: 0.22.0
When a server implementation throws an exception handling an RPC, the Handler
thread catches it and logs it before responding with the exception over the IPC
channel. This is currently done at INFO level.
I'd like to propose that, if the exception is an unchecked exception, it should
be logged at WARN level instead. This can help alert operators when they might
be hitting some kind of bug.
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