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https://issues.apache.org/jira/browse/CASSANDRA-1559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12976297#action_12976297
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Jonathan Ellis commented on CASSANDRA-1559:
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can you rebase to 0.7 branch?

> make {SuperColumn,ColumnFamily}.addColumn() correct in the face of concurrent 
> removals
> --------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-1559
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1559
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 0.7 beta 1
>            Reporter: Peter Schuller
>            Priority: Trivial
>             Fix For: 0.7.1
>
>         Attachments: trunk-1559.txt
>
>
> As reported on the mailing list, the particular lock-less spinning used 
> during column addition is not correct for the case of concurrent removals. As 
> also agreed, concurrent removals do not actually happen.
> Attaching a patch which, as jbellis suggests as an alternative to documenting 
> the restriction on removals not being supported concurrently, makes 
> addColumn() handle that case.

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