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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15638) Shade protobuf
Date Wed, 13 Apr 2016 15:21:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15239404#comment-15239404
] 

stack commented on HBASE-15638:
-------------------------------

When you say 'new project', you mean a new standalone project up on github or something that
hbase would pull in?

bq. Can this solve your problem? stack.

I was thinking of just pulling in the hdfs proto.... Will look again soon. Was going to take
my time returning to this because was hoping others would have better ideas than I (e.g. [~busbey]
'maven tricks' or [~sergey.soldatov]'s suggestion above).

> Shade protobuf
> --------------
>
>                 Key: HBASE-15638
>                 URL: https://issues.apache.org/jira/browse/HBASE-15638
>             Project: HBase
>          Issue Type: Bug
>          Components: Protobufs
>            Reporter: stack
>         Attachments: as.far.as.server.patch
>
>
> Shade protobufs so we can move to a different version without breaking the world. We
want to get up on pb3 because it has unsafe methods that allow us save on copies; it also
has some means of dealing with BBs so we can pass it offheap DBBs. We'll probably want to
change PB3 to open it up some more too so we can stay offheap as we traverse PB. This issue
comes of [~anoop.hbase] and [~ram_krish]'s offheaping of the readpath work.
> This change is mostly straight-forward but there are some tricky bits:
>  # How to interface with HDFS? It wants its ByteStrings. Here in particular in FanOutOneBlockAsyncDFSOutputSaslHelper:
> {code}
>       if (payload != null) {
>         builder.setPayload(ByteString.copyFrom(payload));
>       }
> {code}
>  # [~busbey] also points out that we need to take care of endpoints done as pb. Test
at least.
> Let me raise this one on the dev list too.



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