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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1559) make {SuperColumn,ColumnFamily}.addColumn() correct in the face of concurrent removals
Date Fri, 31 Dec 2010 17:28:46 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12976297#action_12976297
] 

Jonathan Ellis commented on CASSANDRA-1559:
-------------------------------------------

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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