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https://issues.apache.org/jira/browse/CASSANDRA-4021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492021#comment-13492021
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Boris Yen commented on CASSANDRA-4021:
--------------------------------------

I might be wrong. From the log, it looks like C* is started twice in a row. Is 
this a possible cause? Anyway to workaround this?
                
> CFS.scrubDataDirectories tries to delete nonexistent orphans
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-4021
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4021
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.7 beta 2
>            Reporter: Brandon Williams
>            Assignee: Brandon Williams
>            Priority: Minor
>              Labels: datastax_qa
>         Attachments: 4021.txt, node1.log
>
>
> The check only looks for a missing data file, then deletes all other 
> components, however it's possible for the data file and another component to 
> be missing, causing an error:
> {noformat}
>  WARN 17:19:28,765 Removing orphans for 
> /var/lib/cassandra/data/system/HintsColumnFamily/system-HintsColumnFamily-hd-24492:
>  [Index.db, Filter.db, Digest.sha1, Statistics.db, Data.db]
> ERROR 17:19:28,766 Exception encountered during startup
> java.lang.AssertionError: attempted to delete non-existing file 
> system-HintsColumnFamily-hd-24492-Index.db
>         at 
> org.apache.cassandra.io.util.FileUtils.deleteWithConfirm(FileUtils.java:49)
>         at 
> org.apache.cassandra.io.util.FileUtils.deleteWithConfirm(FileUtils.java:44)
>         at 
> org.apache.cassandra.db.ColumnFamilyStore.scrubDataDirectories(ColumnFamilyStore.java:357)
>         at 
> org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:167)
>         at 
> org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.java:352)
>         at 
> org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:105)
> java.lang.AssertionError: attempted to delete non-existing file 
> system-HintsColumnFamily-hd-24492-Index.db
>         at 
> org.apache.cassandra.io.util.FileUtils.deleteWithConfirm(FileUtils.java:49)
>         at 
> org.apache.cassandra.io.util.FileUtils.deleteWithConfirm(FileUtils.java:44)
>         at 
> org.apache.cassandra.db.ColumnFamilyStore.scrubDataDirectories(ColumnFamilyStore.java:357)
>         at 
> org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:167)
>         at 
> org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.java:352)
>         at 
> org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:105)
> Exception encountered during startup: attempted to delete non-existing file 
> system-HintsColumnFamily-hd-24492-Index.db
> {noformat}

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