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From "Phil Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15378) Scanner cannot handle heartbeat message with no results
Date Thu, 10 Mar 2016 02:39:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15188547#comment-15188547
] 

Phil Yang commented on HBASE-15378:
-----------------------------------

Thank you all.
[~tedyu] Why we didn't push to branch-1.1?

> Scanner cannot handle heartbeat message with no results
> -------------------------------------------------------
>
>                 Key: HBASE-15378
>                 URL: https://issues.apache.org/jira/browse/HBASE-15378
>             Project: HBase
>          Issue Type: Bug
>          Components: dataloss, Scanners
>    Affects Versions: 1.2.0, 1.1.3
>            Reporter: Phil Yang
>            Assignee: Phil Yang
>            Priority: Critical
>             Fix For: 2.0.0, 1.3.0, 1.2.1, 1.4.0
>
>         Attachments: HBASE-15378-v1.txt, HBASE-15378-v2.txt, HBASE-15378-v3.txt, HBASE-15378-v4.patch,
HBASE-15378-v5.patch, HBASE-15378-v6.patch
>
>
> When a RS scanner get a TIME_LIMIT_REACHED_MID_ROW state, they will stop scanning and
send back what it has read to client and mark the message as a heartbeat message. If there
is no cell has been read, it will be an empty response. 
> However, ClientScanner only handles the situation that the client gets an empty heartbeat
and its cache is not empty. If the cache is empty too, it will be regarded as end-of-region
and open a new scanner for next region.



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