[
https://issues.apache.org/jira/browse/HBASE-7805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13575480#comment-13575480
]
Lars Hofhansl commented on HBASE-7805:
--------------------------------------
I am happy to claim that my change fixed this problem :) But it won't have an
effect if all data is in the blockcache. You might have run into HBASE-5898.
bq. Would be good if HBase had a base impl class that implementors of
coprocessors could derive from to shield (at least partially) interface changes
like the one to RegionScanner between 0.94.2 and 0.94.4.
We could a BaseRegionScanner with reasonable defaults. In a coprocessor you'd
subclass that.
> Scan of same region processed serially if table has region observer
> coprocessor
> -------------------------------------------------------------------------------
>
> Key: HBASE-7805
> URL: https://issues.apache.org/jira/browse/HBASE-7805
> Project: HBase
> Issue Type: Bug
> Components: Coprocessors, Scanners
> Affects Versions: 0.94.4
> Reporter: James Taylor
> Fix For: 0.96.0, 0.94.5
>
> Attachments: 7805-trunk.txt, ParallelScanTestCoProc.java,
> ParallelScanTest.java
>
>
> If multiple scans to different parts of the same region are executed in
> parallel, they are processed serially if the table has a region observer
> coprocessor.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
