[jira] [Commented] (HIVE-19685) OpenTracing support for HMS

["Todd Lipcon (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-19685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16488129#comment-16488129 ] 

Todd Lipcon commented on HIVE-19685:
------------------------------------

Following is a screenshot of the trace view for the simple integration I've been playing with:
!trace.png! 

This makes it very easy to find issues like HIVE-19605 since the slow queries stick out like a sore thumb. It's also helpful for clients of the HMS who have also integrated opentracing -- it's easier to see how much of the total operation time of a slow request can be attributed to the HMS vs other contributing factors.

> OpenTracing support for HMS
> ---------------------------
>
>                 Key: HIVE-19685
>                 URL: https://issues.apache.org/jira/browse/HIVE-19685
>             Project: Hive
>          Issue Type: New Feature
>          Components: Metastore
>            Reporter: Todd Lipcon
>            Priority: Major
>         Attachments: trace.png
>
>
> When diagnosing performance of metastore operations it isn't always obvious why something took a long time. Using a tracing framework can provide an end-to-end view of an operation including time spent in dependent systems (eg filesystem operations, RDBMS queries, etc). This JIRA proposes to integrate OpenTracing, which is a vendor-neutral tracing API into the HMS server and client.



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