hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-15638) Shade protobuf
Date Wed, 20 Jul 2016 05:23:20 GMT

     [ https://issues.apache.org/jira/browse/HBASE-15638?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-15638:
--------------------------
        Priority: Critical  (was: Major)
    Hadoop Flags: Incompatible change

This is looking to be an incompatible change that breaks endpoint CPs at least. The CP rpc
channels take pb Descriptors and an RpcController to exec. The endpoint would have to be regenerated
using our pb version and with the appropriate shade offset in the packaging. Any thoughts
here [~ghelmling]?

> Shade protobuf
> --------------
>
>                 Key: HBASE-15638
>                 URL: https://issues.apache.org/jira/browse/HBASE-15638
>             Project: HBase
>          Issue Type: Bug
>          Components: Protobufs
>            Reporter: stack
>            Priority: Critical
>         Attachments: 15638v2.patch, 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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message