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https://issues.apache.org/jira/browse/CASSANDRA-1414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12900827#action_12900827
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Jonathan Ellis commented on CASSANDRA-1414:
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can we name the method something like purgeIncompatibleHints (so it doesn't 
imply we blow away all hints at startup), and include in the log message that 
they are snapshotted in case they need to roll back?  (I see you included it in 
NEWS already.)

> Upgrade from 0.6 to 0.7 is bumpy if you have hints
> --------------------------------------------------
>
>                 Key: CASSANDRA-1414
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1414
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 0.7 beta 1
>            Reporter: Gary Dusbabek
>            Assignee: Gary Dusbabek
>             Fix For: 0.7 beta 2
>
>         Attachments: 
> v1-0001-truncate-hints-if-starting-0.7-for-the-first-time.txt
>
>
> Blow away hints on first 7.0 startup (leave a cookie so it doesn't happen 
> every time).
> Document that hints will be deleted as part of starting up an upgraded 0.7 
> node.

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