Ming Ma created HADOOP-10597:
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Summary: Evaluate if we can have RPC client back off when server
is under heavy load
Key: HADOOP-10597
URL: https://issues.apache.org/jira/browse/HADOOP-10597
Project: Hadoop Common
Issue Type: Sub-task
Reporter: Ming Ma
Currently if an application hits NN too hard, RPC requests be in blocking
state, assuming OS connection doesn't run out. Alternatively RPC or NN can
throw some well defined exception back to the client based on certain policies
when it is under heavy load; client will understand such exception and do
exponential back off, as another implementation of RetryInvocationHandler.
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