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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2769) Cannot Create Duplicate Compaction Marker
Date Fri, 17 Jun 2011 14:54:48 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13051113#comment-13051113
] 

Jonathan Ellis commented on CASSANDRA-2769:
-------------------------------------------

+1 v2

> Cannot Create Duplicate Compaction Marker
> -----------------------------------------
>
>                 Key: CASSANDRA-2769
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2769
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.8.0
>            Reporter: Benjamin Coverston
>            Assignee: Sylvain Lebresne
>             Fix For: 0.8.2
>
>         Attachments: 0001-0.8.0-Remove-useless-unmarkCompacting-in-doCleanup.patch, 0001-Do-compact-only-smallerSSTables-v2.patch,
0001-Do-compact-only-smallerSSTables.patch, 0002-Only-compact-what-has-been-succesfully-marked-as-com-v2.patch,
0002-Only-compact-what-has-been-succesfully-marked-as-com.patch
>
>
> Concurrent compaction can trigger the following exception when two threads compact the
same sstable. DataTracker attempts to prevent this but apparently not successfully.
> java.io.IOError: java.io.IOException: Unable to create compaction marker
> 	at org.apache.cassandra.io.sstable.SSTableReader.markCompacted(SSTableReader.java:638)
> 	at org.apache.cassandra.db.DataTracker.removeOldSSTablesSize(DataTracker.java:321)
> 	at org.apache.cassandra.db.DataTracker.replace(DataTracker.java:294)
> 	at org.apache.cassandra.db.DataTracker.replaceCompactedSSTables(DataTracker.java:255)
> 	at org.apache.cassandra.db.ColumnFamilyStore.replaceCompactedSSTables(ColumnFamilyStore.java:932)
> 	at org.apache.cassandra.db.compaction.CompactionTask.execute(CompactionTask.java:173)
> 	at org.apache.cassandra.db.compaction.CompactionManager$1.call(CompactionManager.java:119)
> 	at org.apache.cassandra.db.compaction.CompactionManager$1.call(CompactionManager.java:102)
> 	at java.util.concurrent.FutureTask$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:680)
> Caused by: java.io.IOException: Unable to create compaction marker
> 	at org.apache.cassandra.io.sstable.SSTableReader.markCompacted(SSTableReader.java:634)
> 	... 12 more

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