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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2018/06/27 20:13:00 UTC

[jira] [Commented] (HADOOP-15566) Remove HTrace support

    [ https://issues.apache.org/jira/browse/HADOOP-15566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16525547#comment-16525547 ] 

Steve Loughran commented on HADOOP-15566:
-----------------------------------------

It's a shame to hear about HTrace.

We've an outstanding JIRA to add it to S3A ( HADOOP-12949) , and HADOOP-15407 includes it in the ABFS connector, so I'd like to have an alternative. All we really want in the Hadoop code is the instrumentation to publish information, and to propagate context information all the way down from applications. And we want those applications to wire up to it too, obviously. 

> Remove HTrace support
> ---------------------
>
>                 Key: HADOOP-15566
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15566
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: metrics
>    Affects Versions: 3.1.0
>            Reporter: Todd Lipcon
>            Priority: Major
>
> The HTrace incubator project has voted to retire itself and won't be making further releases. The Hadoop project currently has various hooks with HTrace. It seems in some cases (eg HDFS-13702) these hooks have had measurable performance overhead. Given these two factors, I think we should consider removing the HTrace integration. If there is someone willing to do the work, replacing it with OpenTracing might be a better choice since there is an active community.



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