Blake Eggleston created CASSANDRA-11113:
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Summary: DateTieredCompactionStrategy.getMaximalTask compacts
repaired and unrepaired sstables together
Key: CASSANDRA-11113
URL: https://issues.apache.org/jira/browse/CASSANDRA-11113
Project: Cassandra
Issue Type: Bug
Reporter: Blake Eggleston
Assignee: Blake Eggleston
Fix For: 3.0.x
[DateTieredCompactionStrategy.getMaximalTask|https://github.com/apache/cassandra/blob/cassandra-3.0/src/java/org/apache/cassandra/db/compaction/DateTieredCompactionStrategy.java#L393-393]
creates a compaction task for all of a tables sstables, instead of just the
repaired/unrepaired subset it's responsible for.
This compacts repaired and unrepaired sstables together, effectively demoting
repaired data to unrepaired. Also, since both the repaired and unrepaired
strategy instances are trying to compact the same sstables, there's a 1 minute
delay waiting for {{CompactionManager.waitForCessation}} to time out before
anything happens.
Here's the script I used to duplicate:
https://gist.github.com/bdeggleston/324f4f0df1b7273d8fd5
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