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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-18004) getRegionLocations needs to be called once in ScannerCallableWithReplicas#call()
Date Thu, 15 Jun 2017 20:44:01 GMT

     [ https://issues.apache.org/jira/browse/HBASE-18004?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-18004:
--------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 2.0.0
           Status: Resolved  (was: Patch Available)

Pushed to master and branch-2. Put up a branch-1 patch [~huaxiang] and I'll backport. FYI,
have you seen ./dev-support/submit-patch.py? Ask [~appy] about it.....

Thanks for the patch sir.

> getRegionLocations  needs to be called once in ScannerCallableWithReplicas#call()
> ---------------------------------------------------------------------------------
>
>                 Key: HBASE-18004
>                 URL: https://issues.apache.org/jira/browse/HBASE-18004
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client
>    Affects Versions: 2.0.0
>            Reporter: huaxiang sun
>            Assignee: huaxiang sun
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-18004-master-001.patch, HBASE-18004-master-002.patch
>
>
> Look at this line,
> https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.java#L145
> It calls getRegionLocations() to get the primary region's locations. It's usage is to
figure out table's region replications. Since table's region replication wont be changed until
the table is disabled. It is safe to cache this region replication.



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