[ 
https://issues.apache.org/jira/browse/HUDI-2119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17373847#comment-17373847
 ] 

ASF GitHub Bot commented on HUDI-2119:
--------------------------------------

codecov-commenter edited a comment on pull request #3210:
URL: https://github.com/apache/hudi/pull/3210#issuecomment-872684476


   # 
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 Report
   > Merging 
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 (45925d3) into 
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 (6eca06d) will **decrease** coverage by `1.82%`.
   > The diff coverage is `0.00%`.
   
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   ```diff
   @@             Coverage Diff              @@
   ##             master    #3210      +/-   ##
   ============================================
   - Coverage     47.51%   45.68%   -1.83%     
   + Complexity     5429     4640     -789     
   ============================================
     Files           922      826      -96     
     Lines         40968    37546    -3422     
     Branches       4105     3751     -354     
   ============================================
   - Hits          19464    17152    -2312     
   + Misses        19780    18813     -967     
   + Partials       1724     1581     -143     
   ```
   
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 | `0.00% <0.00%> (ø)` | |
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 | `89.74% <0.00%> (-2.37%)` | :arrow_down: |
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 | `0.00% <0.00%> (ø)` | |
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> Syncing of rollbacks to metadata table does not work in all cases
> -----------------------------------------------------------------
>
>                 Key: HUDI-2119
>                 URL: https://issues.apache.org/jira/browse/HUDI-2119
>             Project: Apache Hudi
>          Issue Type: Bug
>            Reporter: Prashant Wason
>            Assignee: Prashant Wason
>            Priority: Blocker
>              Labels: pull-request-available
>             Fix For: 0.9.0
>
>
> This is an issue with inline automatic rollbacks.
> Metadata table assumes that a rollbacks is to be applied if the 
> instant-being-rolled back has a timestamp less than the last deltacommit time 
> on the metadata timeline. We do not explicitly check if the 
> instant-being-rolled-back was actually written to metadata table.
> **A rollback adds a record to metadata table which "deletes" files from a 
> failed/earlier commit. If the files being deleted were never actually 
> committed to metadata table earlier, the deletes cannot be consolidated 
> during metadata table reads. This leads to a HoodieMetadataException as we 
> cannot differentiate this from a bug where we might have missed committing a 
> commit to metadata table.
>  
>  



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