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https://issues.apache.org/jira/browse/ACCUMULO-4171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15365097#comment-15365097
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Christopher Tubbs commented on ACCUMULO-4171:
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I'm interested in using a modern version... but I don't think my concerns have
been alleviated about API stability, and compatibility between Accumulo,
Hadoop, and HTrace versions.
> Update to htrace-core4
> ----------------------
>
> Key: ACCUMULO-4171
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4171
> Project: Accumulo
> Issue Type: Improvement
> Components: trace
> Reporter: Mike Drob
> Fix For: 1.9.0
>
>
> We are currently using HTrace 3.1.0-incubating. There were some API changes
> and improvements on the way to HTrace 4.x-incubating, and we should stay up
> to date with those changes.
> Currently you can extend Accumulo tracing down into HDFS if you're using
> Accumulo 1.7 and Hadoop 2.7. This ticket is for continuing to make that work
> for versions of Hadoop > 2.7.
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