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https://issues.apache.org/jira/browse/CASSANDRA-5469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633293#comment-13633293
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Yuki Morishita commented on CASSANDRA-5469:
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Probably related to CASSANDRA-5350?
MeteredFlusher could open ColumnFamilyStore before scrubDirectories.
                
> Race condition between index building and scrubDirectories() at startup
> -----------------------------------------------------------------------
>
>                 Key: CASSANDRA-5469
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5469
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.0.12, 1.1.10, 1.2.4
>            Reporter: amorton
>
> From user group 
> http://www.mail-archive.com/[email protected]/msg29207.html
> In CassandraDaemon.setup() the call to SystemTable.checkHealth() results in 
> the CFS's being created. As part of their creation they kick of async 
> secondary index build if the index is not marked as built 
> (SecondaryIndexManager.addIndexedColumn()). Later in CD.setup() the call is 
> made to scrub the data dirs and this can race with the tmp files created by 
> the index rebuild. The result is an error that prevents the node starting.
> Should we delay rebuilding secondary indexes until after startup has 
> completed or rebuild them synchronously ? 

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