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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16761) Migrate existing protobuf2.5.0 Coprocessor Endpoints (and servers-side hbase) to protobuf3.
Date Wed, 05 Oct 2016 12:23:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15548553#comment-15548553

ramkrishna.s.vasudevan commented on HBASE-16761:

bq.Our Admin and Table will always refer to com.google.protobuf. We do not want to expose
our internal protos, the stuff at o.a.h.h.shaded.*.
Ok. I see. So any dependency on com.google.protobuf is fine and only the dependency on Protos
is not good. In case of clients we have removed them but not in CPs as suggested in HBASE-16769.
bq.Somehow we have to give out the message that pb2.5 is going away server-side and that if
a CPEP wants to use pb2.5 after a certain point, then they will have to bundle it themselves.

> Migrate existing protobuf2.5.0 Coprocessor Endpoints (and servers-side hbase) to protobuf3.
> -------------------------------------------------------------------------------------------
>                 Key: HBASE-16761
>                 URL: https://issues.apache.org/jira/browse/HBASE-16761
>             Project: HBase
>          Issue Type: Task
>          Components: Coprocessors
>    Affects Versions: 2.0.0
>            Reporter: stack
>            Priority: Critical
> HBase bundles seven or eight coprocessors. These Coprocessor Endpoints (CPEPs) depend
currently on protobuf 2.5 and reference protobuf classes at com.google.protobuf.* rather than
at the internal relocated location of org.apache.hadoop.hbase.shaded.com.google.protobuf.
> This is issue is about moving our CPEPs to protobuf3.
> I could just replace the protobuf library we depend on making it pb3 but that would break
CPEPs that were not shipped as part of hbase core when we install hbase-2.0.0. Over in HBASE-15638
Shade protobuf we did a bunch of work to ensure CPEPs keep working across the upgrade to hbase-2.0.0
so I suggest we just leave our core CPEPs at pb2.5 for now. Rather, lets have a deprecation
cycle where we deprecate pb2.5 on the hbase server-side (somehow) for hbase-2.0.0 and then
remove pb2.5 in hbase-3.0.0 (or 2.1 or something).
> Would appreciate input on this one. Let me mark this a 2.0.0 critical so it gets some
attention before we finish up the 2.0.0 release.

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