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https://issues.apache.org/jira/browse/MAPREDUCE-6974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved MAPREDUCE-6974.
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Resolution: Won't Fix
> Add standard configuration keys for HTrace values, propagate across to MR
> committers if set
> -------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-6974
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6974
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: job submission, performance
> Affects Versions: 3.0.0-beta1
> Reporter: Steve Loughran
> Priority: Minor
>
> HDFS &c support HTrace logging; HBase sets up spans.
> What doesn't do spans is MR jobs or other frameworks with use the MR
> committers.
> That can be addressed by defining some standard configuration keys for HTrace
> hi/low numbers, setting them in job submission, then passing them over the
> wire in the Configuration, where setupJob and setupTask can extract them &
> use for the tracing span. They could also add their own span for taskCommit
> and jobCommit for performance measurement there.
> Although the core code would be in MR, I'd propose putting the keys into
> Hadoop common,
> with some code in {{org.apache.hadoop.tracing.TraceUtils}}, to set it up.
> That way its possible to use more broadly.
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