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https://issues.apache.org/jira/browse/HADOOP-15566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16561007#comment-16561007
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stack commented on HADOOP-15566:
--------------------------------
Thanks for the input [~michaelsembwever].
bq. ....as the effort is more in adding the instrumentation code in the first
place, and not so much writing the abstraction layer.
Agree
bq. With Cassandra ...of maintaining the existing tracing code as the
abstraction layer, and allowing plugins to it.
Thats this stuff:
https://github.com/apache/cassandra/tree/trunk/src/java/org/apache/cassandra/tracing
?
Could try re-emitting existing (h)traces to zipkin -- it used to work -- or
whatever sink. Would also need to fix it so trace inserts are friction-free
when disabled (currently they drag).
> 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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