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https://issues.apache.org/jira/browse/HADOOP-15566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16705267#comment-16705267
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Sean Busbey commented on HADOOP-15566:
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bq. Sean Busby did a lot of work on shading the Hadoop CP --targeting HBase,
but it's not been rounded off with all the hadoop-tools modules yet, including
the cloud storage connectors. Someone needs to volunteer to embrace shading
I don't want to get this jira sidetracked, but could you point me at more
details on the gap here? I was under the assumption that hadoop-tools stuff was
project internal and thus didn't need shading.
In the downstream facing shading we expressly don't shade HTrace because doing
so breaks some of its functionality (tracing from application through libraries
within the same JVM).
> 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
> Labels: security
> Attachments: Screen Shot 2018-06-29 at 11.59.16 AM.png,
> ss-trace-s3a.png
>
>
> 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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