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https://issues.apache.org/jira/browse/CASSANDRA-13079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15859959#comment-15859959
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Marcus Eriksson commented on CASSANDRA-13079:
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The problem is that if we automatically mark all stables as unrepaired, all
repaired sstables will potentially move to L0 in the unrepaired compaction
strategy, this would cause a lot of compactions across the cluster and that
would probably be even more surprising to users than the fact that they have to
run repair -full
> Repair doesn't work after several replication factor changes
> ------------------------------------------------------------
>
> Key: CASSANDRA-13079
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13079
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: Debian
> Reporter: Vladimir Yudovin
> Assignee: Paulo Motta
> Priority: Critical
>
> Scenario:
> Start two nodes cluster.
> Create keyspace with rep.factor *one*:
> CREATE KEYSPACE rep WITH replication = {'class': 'SimpleStrategy',
> 'replication_factor': 1};
> CREATE TABLE rep.data (str text PRIMARY KEY );
> INSERT INTO rep.data (str) VALUES ( 'qwerty');
> Run *nodetool flush* on all nodes. On one of them table files are created.
> Change replication factor to *two*:
> ALTER KEYSPACE rep WITH replication = {'class': 'SimpleStrategy',
> 'replication_factor': 2};
> Run repair, then *nodetool flush* on all nodes. On all nodes table files are
> created.
> Change replication factor to *one*:
> ALTER KEYSPACE rep WITH replication = {'class': 'SimpleStrategy',
> 'replication_factor': 1};
> Then *nodetool cleanup*, only on initial node remained data files.
> Change replication factor to *two* again:
> ALTER KEYSPACE rep WITH replication = {'class': 'SimpleStrategy',
> 'replication_factor': 2};
> Run repair, then *nodetool flush* on all nodes. No data files on second node
> (though expected, as after first repair/flush).
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