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https://issues.apache.org/jira/browse/HBASE-12938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14295672#comment-14295672
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Andrew Purtell commented on HBASE-12938:
----------------------------------------

Ah, I see what you mean. The HBase span receiver isn't contained within our 
sources, it's in HTrace. 

A rolling upgrade is expected to replace all local jars including dependencies. 
What cross-server issues do you see [~busbey] ? Did HTrace make incompatible 
wire format changes? 

I'm not sure we have much of a choice anyway, the HTrace situation in 0.98 
isn't supportable. I'd hate for folks to have to make private patches to local 
HBase forks for usable tracing.

> Upgrade HTrace to a recent supportable incubating version
> ---------------------------------------------------------
>
>                 Key: HBASE-12938
>                 URL: https://issues.apache.org/jira/browse/HBASE-12938
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Andrew Purtell
>             Fix For: 0.98.11
>
>
> In 0.98 we have an old htrace (still using the org.cloudera.htrace package) 
> and since the introduction of htrace code, htrace itself first moved to 
> org.htrace, then became an incubating project. I filed this as a bug because 
> the HTrace version we reference in 0.98 is of little to no use going forward. 
> Unfortunately we must make a disruptive change, although it looks to be 
> mostly fixing up imports, we expose no HTrace classes to HBase configuration, 
> and where we extend HTrace classes in our code, those HBase classes are in 
> hbase-server and not tagged for public consumption.   



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