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https://issues.apache.org/jira/browse/CASSANDRA-4233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273351#comment-13273351
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Sylvain Lebresne commented on CASSANDRA-4233:
---------------------------------------------
So it's not (only) a problem of overlapping sstables in a given level, since
extracted from the log above we get:
{noformat}
DEBUG [CompactionExecutor:4] 2012-05-11 15:04:39,125 LeveledManifest.java (line
273) Compaction candidates for L0 are Standard1-4(L0), Standard1-3(L0),
Standard1-2(L1),
INFO [CompactionExecutor:4] 2012-05-11 15:04:39,126 CompactionTask.java (line
109) Compacting
[SSTableReader(path='/var/lib/cassandra/data/Keyspace1/Standard1/Keyspace1-Standard1-hd-4-Data.db'),
SSTableReader(path='/var/lib/cassandra/data/Keyspace1/Standard1/Keyspace1-Standard1-hd-3-Data.db'),
SSTableReader(path='/var/lib/cassandra/data/Keyspace1/Standard1/Keyspace1-Standard1-hd-2-Data.db')]
ERROR [CompactionExecutor:4] 2012-05-11 15:04:41,829
AbstractCassandraDaemon.java (line 134) Exception in thread
Thread[CompactionExecutor:4,1,main]
java.lang.AssertionError: Last written key
DecoratedKey(170030165514395172434635544532010976042, 30303033313634) >=
current key DecoratedKey(983360854569225448206418564333137310, 30303036353031)
writing into
/var/lib/cassandra/data/Keyspace1/Standard1/Keyspace1-Standard1-tmp-hd-6-Data.db
{noformat}
That is, we get an error even though we compact 2 L0 with 1 L1.
> overlapping sstables in leveled compaction strategy
> ---------------------------------------------------
>
> Key: CASSANDRA-4233
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4233
> Project: Cassandra
> Issue Type: Bug
> Reporter: Jonathan Ellis
> Attachments: 4233-assert.txt, system.log.bz2
>
>
> CASSANDRA-4142 introduces test failures, that are caused by overlapping
> tables within a level, which Shouldn't Happen.
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