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https://issues.apache.org/jira/browse/CASSANDRA-14532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16518337#comment-16518337
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sankalp kohli commented on CASSANDRA-14532:
-------------------------------------------
>From the response form the dev list: The solution here to start using
>incremental repair and use Marcus patch to only drop tombstones from repaired
>data. This way if incremental repair is not run within gc grace, it will not
>cause this issue.
> Partition level deletions past GCGS are not propagated/merged on read
> ---------------------------------------------------------------------
>
> Key: CASSANDRA-14532
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14532
> Project: Cassandra
> Issue Type: Bug
> Reporter: Kurt Greaves
> Assignee: Kurt Greaves
> Priority: Major
>
> So as [~jay.zhuang] mentioned on the mailing list here, it appears that
> partition deletions that have passed GCGS are not propagated/merged properly
> on read, and also not repaired via read repair.
> Steps to reproduce:
> {code}
> create keyspace test WITH replication = {'class': 'SimpleStrategy',
> 'replication_factor': 3};
> create table test.test (id int PRIMARY KEY , data text) WITH gc_grace_seconds
> = 10;
> CONSISTENCY ALL;
> INSERT INTO test.test (id, data) values (1, 'test');
> ccm node2 stop
> CONSISTENCY QUORUM;
> DELETE from test.test where id = 1; // wait 10 seconds so HH doesn't
> propagate tombstone when starting node2
> select * from test.test where id = 1 ;
> id | data
> ----+------
> (0 rows)
> ccm node2 start
> CONSISTENCY ALL;
> select * from test.test where id = 1 ;
> id | data
> ----+------
> 1 | test
> alter table test.test WITH gc_grace_seconds = 100000; // GC
> select * from test.test where id = 1 ;
> id | data
> ----+------
> (0 rows)
> {code}
> We've also found a seemingly related issue in compaction where trying to
> compact an SSTable which contains the partition deletion post GCGS, the
> partition deletion won't be removed via compaction. Likely the same code is
> causing both bugs.
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