Ariel Weisberg created CASSANDRA-11517:
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Summary: o.a.c.utils.UUIDGen could handle contention better
Key: CASSANDRA-11517
URL: https://issues.apache.org/jira/browse/CASSANDRA-11517
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: Ariel Weisberg
Assignee: Ariel Weisberg
Priority: Minor
Fix For: 3.x
I noticed this profiling a query handler implementation that uses UUIDGen to
get handles to track queries for logging purposes.
Under contention threads are being unscheduled instead of spinning until the
lock is available. I would have expected intrinsic locks to be able to adapt to
this based on profiling information.
Either way it's pretty seems straightforward to rewrite this to use a CAS loop
and test that it generally produces unique values.
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