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https://issues.apache.org/jira/browse/HADOOP-15566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17352209#comment-17352209
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Sean Busbey commented on HADOOP-15566:
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htrace removal already happened in HADOOP-17424. that issue currently is
resolved with a fix included in the trunk branch, which currently means it'll
be in a 3.4.0 release.
> Support OpenTelemetry
> ---------------------
>
> Key: HADOOP-15566
> URL: https://issues.apache.org/jira/browse/HADOOP-15566
> Project: Hadoop Common
> Issue Type: New Feature
> Components: metrics, tracing
> Affects Versions: 3.1.0
> Reporter: Todd Lipcon
> Assignee: Siyao Meng
> Priority: Major
> Labels: pull-request-available, security
> Attachments: HADOOP-15566.000.WIP.patch, OpenTelemetry Support Scope
> Doc v2.pdf, OpenTracing Support Scope Doc.pdf, Screen Shot 2018-06-29 at
> 11.59.16 AM.png, ss-trace-s3a.png
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> 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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