Daryn Sharp created HADOOP-10172:
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Summary: Cache SASL server factories
Key: HADOOP-10172
URL: https://issues.apache.org/jira/browse/HADOOP-10172
Project: Hadoop Common
Issue Type: Improvement
Components: ipc
Affects Versions: 2.0.0-alpha, 0.23.0, 3.0.0
Reporter: Daryn Sharp
Assignee: Daryn Sharp
Priority: Critical
Performance for SASL server creation is _atrocious_. {{Sasl.createSaslServer}}
does not cache the provider resolution for the factories. Factory resolution
and server instantiation has 3 major contention points. During bursts of
connections, one reader accepting a connection stalls other readers accepting
connections, in turn stalling all existing connections handled by those readers.
I benched 5 threads at 187 instances/s - total, not per thread. With this and
another change, I've boosted it to 33K instances/s.
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