[jira] [Commented] (SPARK-20863) Add metrics/instrumentation to LiveListenerBus

["Miles Crawford (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-20863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16116905#comment-16116905 ] 

Miles Crawford commented on SPARK-20863:
----------------------------------------

How can I enable and view these metrics on my applications? I am having lots of trouble with dropped events, and I'd like to diagnose the issue.

> Add metrics/instrumentation to LiveListenerBus
> ----------------------------------------------
>
>                 Key: SPARK-20863
>                 URL: https://issues.apache.org/jira/browse/SPARK-20863
>             Project: Spark
>          Issue Type: New Feature
>          Components: Spark Core
>    Affects Versions: 2.2.0
>            Reporter: Josh Rosen
>            Assignee: Josh Rosen
>             Fix For: 2.3.0
>
>
> I think that we should add Coda Hale metrics to the LiveListenerBus in order to count the number of queued, processed, and dropped events, as well as a timer tracking per-event processing times.



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