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https://issues.apache.org/jira/browse/HBASE-28456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17830972#comment-17830972
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Bryan Beaudreault commented on HBASE-28456:
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Pushed to branch-2.6+. Thanks [~rubenvw] for reporting and the test case, and
[~ndimiduk] & [~zhangduo] for review.
> HBase Restore restores old data if data for the same timestamp is in
> different hfiles
> -------------------------------------------------------------------------------------
>
> Key: HBASE-28456
> URL: https://issues.apache.org/jira/browse/HBASE-28456
> Project: HBase
> Issue Type: Bug
> Components: backup&restore
> Reporter: Ruben Van Wanzeele
> Assignee: Bryan Beaudreault
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 2.6.0, 3.0.0-beta-2
>
> Attachments:
> Add_incremental_test_for_HBASE-28456_Fix_HBASE-28412_for_incremental_test.patch,
> ChangesOnHFilesOnSameTimestampAreNotCorrectlyRestored.java
>
>
> The restore brings back 'old' data when executing restore.
> It feels like the hfile sequence id is not respected during the restore.
> See testing code attached. The workaround solution is to trigger major
> compaction before doing the backup (not really feasible for daily backups)
> We didn't investigate this yet, but this might also impact the merge of
> multiple incremental backups (since that follows a similar code path merging
> hfiles).
> This currently blocks our support for HBase backup and restore.
> Willing to participate in a solution if necessary.
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