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https://issues.apache.org/jira/browse/CASSANDRA-8211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14301131#comment-14301131
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Marcus Eriksson commented on CASSANDRA-8211:
--------------------------------------------
[~imriz] that is unrelated (compaction_history is not LCS), if you see this on
more that one node, file a new ticket, otherwise i would suspect you have some
data corruption and need to run scrub
> Overlapping sstables in L1+
> ---------------------------
>
> Key: CASSANDRA-8211
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8211
> Project: Cassandra
> Issue Type: Bug
> Reporter: Marcus Eriksson
> Assignee: Marcus Eriksson
> Fix For: 2.0.12, 2.1.3
>
> Attachments: 0001-Avoid-overlaps-in-L1-v2.patch,
> 0001-Avoid-overlaps-in-L1.patch
>
>
> Seems we have a bug that can create overlapping sstables in L1:
> {code}
> WARN [main] 2014-10-28 04:09:42,295 LeveledManifest.java (line 164) At level
> 2, SSTableReader(path='<sstable>') [DecoratedKey(2838397575996053472, 00
> 10000000001111000000000000066059b200001000000000066059b200000000111100000000100000000000004000000000000000000100),
> DecoratedKey(5516674013223138308,
> 001000000000111100000000000000ff2d160000100000000000ff2d1600000
> 000111100000000100000000000004000000000000000000100)] overlaps
> SSTableReader(path='<sstable>') [DecoratedKey(2839992722300822584,
> 00100000000011110000
> 0000000000229ad20000100000000000229ad200000000111100000000100000000000004000000000000000000100),
> DecoratedKey(5532836928694021724,
> 0010000000001111000000000000034b05a600001000000000034b05a600000000111100000000100
> 000000000004000000000000000000100)]. This could be caused by a bug in
> Cassandra 1.1.0 .. 1.1.3 or due to the fact that you have dropped sstables
> from another node into the data directory. Sending back to L0. If
> you didn't drop in sstables, and have not yet run scrub, you should do so
> since you may also have rows out-of-order within an sstable
> {code}
> Which might manifest itself during compaction with this exception:
> {code}
> ERROR [CompactionExecutor:3152] 2014-10-28 00:24:06,134 CassandraDaemon.java
> (line 199) Exception in thread Thread[CompactionExecutor:3152,1,main]
> java.lang.RuntimeException: Last written key
> DecoratedKey(5516674013223138308,
> 001000000000111100000000000000ff2d160000100000000000ff2d1600000000111100000000100000000000004000000000000000000100)
> >= current key DecoratedKey(2839992722300822584,
> 001000000000111100000000000000229ad20000100000000000229ad200000000111100000000100000000000004000000000000000000100)
> writing into <sstable>
> {code}
> since we use LeveledScanner when compacting (the backing sstable scanner
> might go beyond the start of the next sstable scanner)
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