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https://issues.apache.org/jira/browse/CASSANDRA-4411?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13421487#comment-13421487
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Mina Naguib commented on CASSANDRA-4411:
----------------------------------------
Things appear better after an offline scrub. While the scrubbing itself was
uneventful, at the very end it did "Checking leveled manifest", found 14
sstables in level 3 and level 4 that were problematic and moved them back to
level 0.
I started the node back up and all (+/- 10) compactions ran successfully.
I'll keep an eye on it and if it stays well I'll do the same to the other
nodes. Perhaps I'll try my luck with sstablescrub --manifest-check to see if I
can keep the downtime to a minimum.
> Assertion with LCS compaction
> -----------------------------
>
> Key: CASSANDRA-4411
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4411
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.1.2
> Reporter: Anton Winter
> Assignee: Sylvain Lebresne
> Fix For: 1.1.3
>
> Attachments: 0001-Add-debugging-info-for-LCS.txt, 4411-followup.txt,
> 4411.txt, assertion-w-more-debugging-info-omid.log,
> assertion.moreinfo.system.log, system.log
>
>
> As instructed in CASSANDRA-4321 I have raised this issue as a continuation of
> that issue as it appears the problem still exists.
> I have repeatedly run sstablescrub across all my nodes after the 1.1.2
> upgrade until sstablescrub shows no errors. The exceptions described in
> CASSANDRA-4321 do not occur as frequently now but the integrity check still
> throws exceptions on a number of nodes. Once those exceptions occur
> compactionstats shows a large number of pending tasks with no progression
> afterwards.
> {code}
> ERROR [CompactionExecutor:150] 2012-07-05 04:26:15,570
> AbstractCassandraDaemon.java (line 134) Exception in thread
> Thread[CompactionExecutor:150,1,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:978)
> 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$1.runMayThrow(CompactionManager.java:150)
> at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:636)
> {code}
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