[jira] [Commented] (CASSANDRA-6920) LatencyMetrics can return infinity

["Nick Bailey (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-6920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13958258#comment-13958258 ] 

Nick Bailey commented on CASSANDRA-6920:
----------------------------------------

FWIW, I said "potential" fix because I didn't really know if there were performance concerns adding that synchronized block on a method we call for every read/write that comes in to the system.

Just wanted to mention that here in case there are concerns.

> 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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