[jira] [Assigned] (HBASE-28456) HBase Restore restores old data if data for the same timestamp is in different hfiles

["Bryan Beaudreault (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-28456?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bryan Beaudreault reassigned HBASE-28456:
-----------------------------------------

    Assignee: Bryan Beaudreault

> 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
>    Affects Versions: 2.6.0, 3.0.0
>            Reporter: Ruben Van Wanzeele
>            Assignee: Bryan Beaudreault
>            Priority: Blocker
>         Attachments: 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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