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https://issues.apache.org/jira/browse/HBASE-18948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16193466#comment-16193466
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Josh Elser commented on HBASE-18948:
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bq. We should review RPC handling. We allow clients to build raw cell
serializations, potentially including tags, and submit them. I can't say if
they are stripped out or not. It will take a code review to be certain (hint
hint)
Point taken ;). Definitely need a server-side audit to understand this aspect
better.
bq. It is definitely true tags are stripped out when sending RPC responses
Ok, this is a good clarification (that I missed). The improvement Triguna was
trying to make was specifically around clients not seeing the tags in an RPC
response (I believe this stemmed from some user-confusion that we've had to
explain a few times).
bq. the replication client, which uses a special codec that includes tags, so
all cell state including tags makes it to the target cluster
Ah, of course. This is a good clarification (all replication endpoints, custom
or not, _do_ receive cell tags).
> HBase tags are server side only.
> --------------------------------
>
> Key: HBASE-18948
> URL: https://issues.apache.org/jira/browse/HBASE-18948
> Project: HBase
> Issue Type: Improvement
> Components: documentation
> Reporter: Thiriguna Bharat Rao
> Assignee: Thiriguna Bharat Rao
> Priority: Minor
> Fix For: 3.0.0
>
> Attachments: HBASE-18948.patch
>
>
> HBase tags are server side only. In the Apache HBase documentation, in
> section 62.1.1 http://hbase.apache.org/book.html#_implementation_details , I
> am going to add a sentence to state explicitly that "Tags are not available
> for get/set from client operations including coprocessors".
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