Ming Ma created HADOOP-10599:
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Summary: Support prioritization of DN RPCs over client RPCs
Key: HADOOP-10599
URL: https://issues.apache.org/jira/browse/HADOOP-10599
Project: Hadoop Common
Issue Type: Sub-task
Reporter: Ming Ma
We might need to prioritize DN RPC over client RPC so that no matter what
application do to NN RPC and FSNamesystem's global lock, DN's requests will be
processed timely. After a cluster is configured to have service RPC server
separated from client RPC server, it is mitigated to some degree with fair
FSNamesystem's global lock. Also if the NN global lock can be made more fine
grained; such need becomes less important. Still, it will be good to evaluate
if this is a good option.
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