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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8028) Append, Increment: Adding rollback support
Date Fri, 29 Mar 2013 21:07:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13617721#comment-13617721
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Jimmy Xiang commented on HBASE-8028:
------------------------------------

When maxversion = 1, will the normal rollback work? Do we have to do something different?
 It will be great if you can add a testcase to demonstrate the problem mentioned in the description,
and it's fixed with the patch.
                
> Append, Increment: Adding rollback support
> ------------------------------------------
>
>                 Key: HBASE-8028
>                 URL: https://issues.apache.org/jira/browse/HBASE-8028
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.94.5
>            Reporter: Himanshu Vashishtha
>            Assignee: Himanshu Vashishtha
>             Fix For: 0.95.0
>
>         Attachments: HBase-8028-v1.patch, HBase-8028-v2.patch, HBase-8028-with-Increments-v1.patch
>
>
> In case there is an exception while doing the log-sync, the memstore is not rollbacked,
while the mvcc is _always_ forwarded to the writeentry created at the beginning of the operation.
This may lead to scanners seeing results which are not synched to the fs.

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