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https://issues.apache.org/jira/browse/CASSANDRA-6920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13959352#comment-13959352
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Benedict commented on CASSANDRA-6920:
-------------------------------------
Zero is not incorrect on race - zero is in fact completely correct, since the
only scenario in which you can get infinite is when one of the two values has
changed and the other hasn't, i.e. you peeked inbetween the only update for the
interval. So if you'd peeked a moment before you'd have seen zero. So you just
pretend you peeked a moment before.
> LatencyMetrics can return infinity
> -----------------------------------
>
> Key: CASSANDRA-6920
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6920
> Project: Cassandra
> Issue Type: Bug
> Reporter: Nick Bailey
> Assignee: Nick Bailey
> Fix For: 1.2.17, 2.0.7, 2.1 beta2
>
> Attachments: 6920-cassandra-1.2.patch, 6920-cassandra-2.0.patch,
> 6920-infinity-metrics.patch
>
>
> There is a race condition when updating the recentLatency metrics exposed
> from LatencyMetrics.
> Attaching a patch with a test that exposes the issue and a potential fix.
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