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https://issues.apache.org/jira/browse/CASSANDRA-15327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16931412#comment-16931412
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James Baker commented on CASSANDRA-15327:
-----------------------------------------
And to answer my own question...
In Cassandra 2.2, it appears that the repaired_at flag is indeed set to
unrepaired when bootstrapping. In trunk, it's less obvious that this is the
case. That said, we stream ranges, and all of the SSTables for the range are
added to the column family store at once, and so barring someone reloading
SSTables during the bootstrap procedure, it probably works as intended.
> Deleted data can re-appear if range movement streaming time exceeds
> gc_grace_seconds
> ------------------------------------------------------------------------------------
>
> Key: CASSANDRA-15327
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15327
> Project: Cassandra
> Issue Type: Bug
> Components: Consistency/Bootstrap and Decommission
> Reporter: Leon Zaruvinsky
> Priority: Normal
> Fix For: 2.2.15, 2.1.x
>
> Attachments: CASSANDRA-15327-2.1.txt, CASSANDRA-15327-2.2.txt
>
>
> Hey,
> We've come across a scenario in production (noticed on Cassandra 2.2.14)
> where data that is deleted from Cassandra at consistency {{ALL}} can be
> resurrected. I've added a reproduction in a comment.
> If a {{delete}} is issued during a range movement (i.e. bootstrap,
> decommission, move), and {{gc_grace_seconds}} is surpassed before the stream
> is finished, then the tombstones from the {{delete}} can be purged from the
> recipient node before the data is streamed. Once the move is complete, the
> data now exists on the recipient node without a tombstone.
> We noticed this because our bootstrapping time occasionally exceeds our
> configured gc_grace_seconds, so we lose the consistency guarantee. As an
> operator, it would be great to not have to worry about this edge case.
> I've attached a patch that we have tested and successfully used in
> production, and haven't noticed any ill effects. Happy to submit patches for
> more recent versions, I'm not sure how cleanly this will actually merge since
> there was some refactoring to this logic in 3.x.
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