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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3650) Remove ProtocolBuffers dependency from core
Date Wed, 11 Mar 2015 19:14:38 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14357415#comment-14357415
] 

Josh Elser commented on ACCUMULO-3650:
--------------------------------------

It's kind of a shame. I much prefer working with Protobuf over Thrift (I think the API is
just easier to work with), but I didn't think about the implications of a specific protobuf
version coming in from Hadoop (nor the issues of old pb messages needing to be "recompiled'
to work with the newer protobuf version).

I'm testing out some changes right now which encapsulate protobuf wholly within the server.
Hopefully, we can nuke protobuf entirely before we ship out 1.7.0 (just to avoid another maintenance
burden issue).

> Remove ProtocolBuffers dependency from core
> -------------------------------------------
>
>                 Key: ACCUMULO-3650
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3650
>             Project: Accumulo
>          Issue Type: Task
>          Components: client, replication
>            Reporter: Josh Elser
>            Assignee: Josh Elser
>            Priority: Blocker
>             Fix For: 1.7.0
>
>
> Protocol buffers was used as a part of the data-center replication feature. It was meant
to be a server-side only construct, not leaking out to clients, but this unintentionally happened
via ReplicationOperationsImpl.
> If we move this functionality into the master or tserver, we could avoid the need for
clients to even know this is happening under the hood. It would give users more flexibility
without running into issues like HADOOP-9845.



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