Marcus Eriksson created CASSANDRA-16735:
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             Summary: 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


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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