Assertions running Cleanup on a 3-node cluster with Cassandra 1.1.4 and LCS

[Rudolf van der Leeden]

Hi,

I'm getting 5 identical assertions while running 'nodetool cleanup' on a
Cassandra 1.1.4 node with Load=104G and 80m keys.
>From  system.log :

ERROR [CompactionExecutor:576] 2012-09-10 11:25:50,265
AbstractCassandraDaemon.java (line 134) Exception in thread
Thread[CompactionExecutor:576,1,main]
java.lang.AssertionError
        at
org.apache.cassandra.db.compaction.LeveledManifest.promote(LeveledManifest.java:214)
        at
org.apache.cassandra.db.compaction.LeveledCompactionStrategy.handleNotification(LeveledCompactionStrategy.java:158)
        at
org.apache.cassandra.db.DataTracker.notifySSTablesChanged(DataTracker.java:531)
        at
org.apache.cassandra.db.DataTracker.replaceCompactedSSTables(DataTracker.java:254)
        at
org.apache.cassandra.db.ColumnFamilyStore.replaceCompactedSSTables(ColumnFamilyStore.java:992)
        at
org.apache.cassandra.db.compaction.CompactionTask.execute(CompactionTask.java:200)
        at
org.apache.cassandra.db.compaction.LeveledCompactionTask.execute(LeveledCompactionTask.java:50)
        at
org.apache.cassandra.db.compaction.CompactionManager$1.runMayThrow(CompactionManager.java:154)
        at
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
        at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at
java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)

After 3 hours the job is done and there are 11390 compaction tasks pending.
My question: Can these assertions be ignored? Or do I need to worry about
it?

Thanks for your help and best regards,
-Rudolf.