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https://issues.apache.org/jira/browse/CASSANDRA-11517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15274384#comment-15274384
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Joel Knighton commented on CASSANDRA-11517:
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Great - note to committer: the patch to apply is in my most recent comment and
also linked here
[jkni/CASSANDRA-11517-trunk|https://github.com/jkni/cassandra/tree/CASSANDRA-11517-trunk].
> 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 seems pretty straightforward to rewrite this to use a CAS
> loop and test that it generally produces unique values.
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