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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-184) intermittent OneCompactionTest failure
Date Mon, 18 May 2009 19:11:45 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12710455#action_12710455
] 

Jonathan Ellis commented on CASSANDRA-184:
------------------------------------------

only one compaction can be in progress at a time, but flushes and compactions can happen concurrently
(different executors) so a thread flushing CF A can schedule A for a compaction (i.e. submit
the op on the MCM) even if A is currently being compacted.  the comment is explaining that
when the MCM gets to that redundant compact the impact will be minimal.

> intermittent OneCompactionTest failure
> --------------------------------------
>
>                 Key: CASSANDRA-184
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-184
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.3
>            Reporter: Jonathan Ellis
>         Attachments: 184-0.3.patch, 184-trunk.patch
>
>
> [junit] junit.framework.AssertionFailedError                                        
     
>     [junit]     at org.apache.cassandra.io.SSTable.delete(SSTable.java:223)         
         
>     [junit]     at org.apache.cassandra.db.ColumnFamilyStore.doFileCompaction(ColumnFamilyStore.java:1454)
>     [junit]     at org.apache.cassandra.db.ColumnFamilyStore.doCompaction(ColumnFamilyStore.java:896)
    
>     [junit]     at org.apache.cassandra.db.OneCompactionTest.testCompaction(OneCompactionTest.java:47)
   
>     [junit]     at org.apache.cassandra.db.OneCompactionTest.testCompaction2(OneCompactionTest.java:60)
  

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