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From "Mikhail Antonov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11467) New impl of Registry interface not using ZK + new RPCs on master protocol
Date Fri, 18 Jul 2014 22:48:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14067031#comment-14067031
] 

Mikhail Antonov commented on HBASE-11467:
-----------------------------------------

On a related topic about doing those RPC calls to master. Now on the client side we retrive
ServerName stored in ZK by calling MasterAddressTracker.getMasterAddress(), which returns
full servername including startcode. When we connect to masters using just client config,
we know address and port, but can't know startcode upfront, so have to use 0L startcode. Looking
into implications..

> New impl of Registry interface not using ZK + new RPCs on master protocol
> -------------------------------------------------------------------------
>
>                 Key: HBASE-11467
>                 URL: https://issues.apache.org/jira/browse/HBASE-11467
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, Consensus, Zookeeper
>            Reporter: Mikhail Antonov
>            Assignee: Mikhail Antonov
>             Fix For: 2.0.0
>
>
> Currently there' only one implementation of Registry interface, which is using ZK to
get info about meta. Need to create implementation which will be using  RPC calls to master
the client is connected to.
> That includes adding several new methods to master RPC protocol:
> - GetMetaRegionLocation
> - GetClusterId
> - IsTableOnlineState
> - GetCurrentNrHRS 



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