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https://issues.apache.org/jira/browse/CASSANDRA-6086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13776428#comment-13776428
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Oleg Anastasyev commented on CASSANDRA-6086:
--------------------------------------------

>From the other hand, the leftovers about to remove are already missing (i.e. 
>already removed) when exception is thrown. I am not sure how can it  influence 
>counter value.
                
> Node refuses to start with exception in 
> ColumnFamilyStore.removeUnfinishedCompactionLeftovers when find that some to 
> be removed files are already removed
> ---------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6086
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6086
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Oleg Anastasyev
>            Assignee: Oleg Anastasyev
>             Fix For: 2.0.2
>
>         Attachments: removeUnfinishedCompactionLeftovers.txt
>
>
> Node refuses to start with
> {code}
> Caused by: java.lang.IllegalStateException: Unfinished compactions reference 
> missing sstables. This should never happen since compactions are marked 
> finished before we start removing the old sstables.
>       at 
> org.apache.cassandra.db.ColumnFamilyStore.removeUnfinishedCompactionLeftovers(ColumnFamilyStore.java:544)
>       at 
> org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:262)
> {code}
> IMO, there is no reason to refuse to start discivering files that must be 
> removed are already removed. It looks like pure bug diagnostic code and mean 
> nothing to operator (nor he can do anything about this).
> Replaced throw of excepion with dump of diagnostic warning and continue 
> startup.

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