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https://issues.apache.org/jira/browse/HIVE-17196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16165407#comment-16165407
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Daniel Dai commented on HIVE-17196:
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[~sankarh], can you review?
> CM: ReplCopyTask should retain the original file names even if copied from CM
> path.
> -----------------------------------------------------------------------------------
>
> Key: HIVE-17196
> URL: https://issues.apache.org/jira/browse/HIVE-17196
> Project: Hive
> Issue Type: Sub-task
> Components: repl
> Affects Versions: 2.1.0
> Reporter: Sankar Hariappan
> Assignee: Daniel Dai
> Fix For: 3.0.0
>
> Attachments: HIVE-17196.1.patch
>
>
> Consider the below scenario,
> 1. Insert into table T1 with value(X).
> 2. Insert into table T1 with value(X).
> 3. Truncate the table T1.
> – This step backs up 2 files with same content to cmroot which ends up with
> one file in cmroot as checksum matches.
> 4. Incremental repl with above 3 operations.
> – In this step, both the insert event files will be read from cmroot where
> copy of one leads to overwrite the other one as the file name is same in cm
> path (checksum as file name).
> So, this leads to data loss and hence it is necessary to retain the original
> file names even if we copy from cm path.
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