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From "Sylvain Lebresne (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3306) Error in LeveledCompactionStrategy
Date Fri, 04 Nov 2011 18:33:51 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13144240#comment-13144240
] 

Sylvain Lebresne commented on CASSANDRA-3306:
---------------------------------------------

I'll note that more info have been added to the messages thrown by the exception here in 1.0.1.
So if someone can reproduce this issue on 1.0.1, it would be useful to get the stacktrace
(the full system.log would actually be even better).
                
> Error in LeveledCompactionStrategy
> ----------------------------------
>
>                 Key: CASSANDRA-3306
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3306
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.0.0
>            Reporter: Radim Kolar
>             Fix For: 1.0.3
>
>
> during stress testing, i always get this error making leveledcompaction strategy unusable.
Should be easy to reproduce - just write fast.
> ERROR [CompactionExecutor:6] 2011-10-04 15:48:52,179 AbstractCassandraDaemon.java (line
133) Fatal exception in thread Thread[CompactionExecutor:6,5,main]
> java.lang.AssertionError
> 	at org.apache.cassandra.db.DataTracker$View.newSSTables(DataTracker.java:580)
> 	at org.apache.cassandra.db.DataTracker$View.replace(DataTracker.java:546)
> 	at org.apache.cassandra.db.DataTracker.replace(DataTracker.java:268)
> 	at org.apache.cassandra.db.DataTracker.replaceCompactedSSTables(DataTracker.java:232)
> 	at org.apache.cassandra.db.ColumnFamilyStore.replaceCompactedSSTables(ColumnFamilyStore.java:960)
> 	at org.apache.cassandra.db.compaction.CompactionTask.execute(CompactionTask.java:199)
> 	at org.apache.cassandra.db.compaction.LeveledCompactionTask.execute(LeveledCompactionTask.java:47)
> 	at org.apache.cassandra.db.compaction.CompactionManager$1.call(CompactionManager.java:131)
> 	at org.apache.cassandra.db.compaction.CompactionManager$1.call(CompactionManager.java:114)
> 	at java.util.concurrent.FutureTask$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)
> and this is in json data for table:
> {
>   "generations" : [ {
>     "generation" : 0,
>     "members" : [ 459, 460, 461, 462, 463, 464, 465, 466, 467, 468, 469, 470, 471, 472,
473, 474, 475, 476, 477, 478, 479, 480, 481, 482, 483, 484 ]
>   }, {
>     "generation" : 1,
>     "members" : [ ]
>   }, {
>     "generation" : 2,
>     "members" : [ ]
>   }, {
>     "generation" : 3,
>     "members" : [ ]
>   }, {
>     "generation" : 4,
>     "members" : [ ]
>   }, {
>     "generation" : 5,
>     "members" : [ ]
>   }, {
>     "generation" : 6,
>     "members" : [ ]
>   }, {
>     "generation" : 7,
>     "members" : [ ]
>   } ]
> }

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