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https://issues.apache.org/jira/browse/HBASE-8028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13619104#comment-13619104
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Jimmy Xiang commented on HBASE-8028:
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In MemStore#rollbackUpsert, internalAdd is used to add back the original value.
Will this change the readpoint? Should we add it to snapshot as well?
> 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, HBase-8028-with-Increments-v2.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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