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https://issues.apache.org/jira/browse/HBASE-18601?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Busbey reopened HBASE-18601:
---------------------------------
{{TestHTraceHooks}} fails reliably in master (nightly and on my local box) and
passes if I revert this change.
I tried digging in to see why the failure. It looks like before the patch this
part of the test checked for 1 root instead of 3. There's not enough detail in
the test for it to be obvious how many roots ought to be there. Unfortunately,
the relevant class, {{TraceTree}}, isn't in the [HTrace 4.1
javadocs|http://htrace.incubator.apache.org/javadoc/4.1/htrace-core/index.html]
and the [HTrace website|http://htrace.incubator.apache.org/#releases] makes no
references at all to a 4.2 release. So I'm at a loss.
> Update Htrace to 4.2
> --------------------
>
> Key: HBASE-18601
> URL: https://issues.apache.org/jira/browse/HBASE-18601
> Project: HBase
> Issue Type: Task
> Affects Versions: 2.0.0, 3.0.0
> Reporter: Tamas Penzes
> Assignee: Balazs Meszaros
> Fix For: 2.0.0-beta-1
>
> Attachments: HBASE-18601.master.001.patch,
> HBASE-18601.master.002.patch, HBASE-18601.master.003 (3).patch,
> HBASE-18601.master.003.patch, HBASE-18601.master.004.patch,
> HBASE-18601.master.004.patch, HBASE-18601.master.005.patch,
> HBASE-18601.master.006.patch, HBASE-18601.master.006.patch,
> HBASE-18601.master.007.patch, HBASE-18601.master.007.patch,
> HBASE-18601.master.007.patch, HBASE-18601.master.008.patch,
> HBASE-18601.master.009.patch, HBASE-18601.master.009.patch,
> HBASE-18601.master.010.patch, HBASE-18601.master.010.patch,
> HBASE-18601.master.011.patch, HBASE-18601.master.012.patch,
> HBASE-18601.master.013.patch, HBASE-18601.master.014.patch,
> HBASE-18601.master.014.patch, HBASE-18601.master.015.patch
>
>
> HTrace is not perfectly integrated into HBase, the version 3.2.0 is buggy,
> the upgrade to 4.x is not trivial and would take time. It might not worth to
> keep it in this state, so would be better to remove it.
> Of course it doesn't mean tracing would be useless, just that in this form
> the use of HTrace 3.2 might not add any value to the project and fixing it
> would be far too much effort.
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> Based on the decision of the community we keep htrace now and update version
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