Mike Percy created KUDU-2160:
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Summary: Reduce UpdateConsensus RPC timeouts
Key: KUDU-2160
URL: https://issues.apache.org/jira/browse/KUDU-2160
Project: Kudu
Issue Type: Bug
Components: consensus
Affects Versions: 1.5.0
Reporter: Mike Percy
We will often see many UpdateConsensus() RPC calls time out when disks are
slow. We need to investigate this issue further and understand the dynamics
better, then find a solution.
When the local disks on a Kudu cluster get overloaded, RaftConsensus metadata
fsyncs caused by Raft votes and term changes take longer, which causes the
RaftConsensus lock to be held. This causes "stacking" of UpdateConsensus()
RPCs, resulting in timeouts.
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