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From "Tianying Chang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17453) add Ping into HBase server for deprecated GetProtocolVersion
Date Tue, 07 Mar 2017 23:29:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15900381#comment-15900381
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Tianying Chang commented on HBASE-17453:
----------------------------------------

 [~stack] sorry for the long delay. What we want is a simple API at RS side that we can use
to poll to verify if the connection behave weird, and need reconnect. Earlier, GetPrococolVersion
in 94 was borrowed to achieve this goal as a side effect. Basically, this call should be a
simple and cheap one. I can made a patch for trunk if needed. 

> add Ping into HBase server for deprecated GetProtocolVersion
> ------------------------------------------------------------
>
>                 Key: HBASE-17453
>                 URL: https://issues.apache.org/jira/browse/HBASE-17453
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 1.2.2
>            Reporter: Tianying Chang
>            Assignee: Tianying Chang
>            Priority: Minor
>         Attachments: HBASE-17453-1.2.patch
>
>
> Our HBase service is hosted in AWS. We saw cases where the connection between the client
(Asynchbase in our case) and server stop working but did not throw any exception, therefore
traffic stuck. So we added a "Ping" feature in AsyncHBase 1.5 by utilizing the GetProtocolVersion()
API provided at RS side, if no traffic for given time, we send the "Ping", if no response
back for "Ping", we assume the connect is bad and reconnect. 
> Now we are upgrading cluster from 94 to 1.2. However, GetProtocolVersion() is deprecated.
To be able to support same detect/reconnect feature, we added Ping() in our internal HBase
1.2 branch, and also patched accordingly in Asynchbase 1.7.
> We would like to open source this feature since it is useful for use case in AWS environment.




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