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From "Matt Warhaftig (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16010) Put draining function through Admin API
Date Wed, 21 Dec 2016 17:18:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15767600#comment-15767600
] 

Matt Warhaftig commented on HBASE-16010:
----------------------------------------

Thanks Jerry, Feel free to fix the first issue and commit.

As for the second issue, MasterRpcServices uses the fully qualified classname of {{org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.ServerName}}
because MasterRpcServices already has a {{ServerName}} import entry ({{org.apache.hadoop.hbase.ServerName}})
and they would conflict.

> Put draining function through Admin API
> ---------------------------------------
>
>                 Key: HBASE-16010
>                 URL: https://issues.apache.org/jira/browse/HBASE-16010
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Jerry He
>            Assignee: Matt Warhaftig
>            Priority: Minor
>         Attachments: hbase-16010-v1.patch, hbase-16010-v2.patch
>
>
> Currently, there is no Amdin API for draining function. Client has to interact directly
with Zookeeper draining node to add and remove draining servers.
> For example, in draining_servers.rb:
> {code}
>   zkw = org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.new(config, "draining_servers",
nil)
>   parentZnode = zkw.drainingZNode
>   begin
>     for server in servers
>       node = ZKUtil.joinZNode(parentZnode, server)
>       ZKUtil.createAndFailSilent(zkw, node)
>     end
>   ensure
>     zkw.close()
>   end
> {code}
> This is not good in cases like secure clusters with protected Zookeeper nodes.
> Let's put draining function through Admin API.



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