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https://issues.apache.org/jira/browse/CASSANDRA-16735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17369580#comment-17369580
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Brandon Williams commented on CASSANDRA-16735:
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Note that this broke ~370 tests in the 3.0 to 3.11 upgrade:
https://ci-cassandra.apache.org/job/Cassandra-3.11/186/ caused by our old
friend "Unknown column cdc during deserialization"
> Adding columns via ALTER TABLE can generate corrupt sstables
> ------------------------------------------------------------
>
> Key: CASSANDRA-16735
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16735
> Project: Cassandra
> Issue Type: Bug
> Components: Consistency/Repair, Local/SSTable
> Reporter: Marcus Eriksson
> Assignee: Marcus Eriksson
> Priority: Normal
> Fix For: 3.0.25, 3.11.11, 4.0-rc2
>
>
> This is similar to CASSANDRA-13004 and was caused by CASSANDRA-15899
> Basically the column placeholders introduced in 15899 can get read-repaired
> in to the memtable and later flushed to disk and in some cases this can
> conflict with the actual column (if the actual column is a collection for
> example) and cause CorruptSSTableExceptions.
> Fix is probably to just revert 15899, at least until if and when we find a
> solution that we can rely on. Will post that + test next week.
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