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https://issues.apache.org/jira/browse/CASSANDRA-5061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13531025#comment-13531025
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Marcus Eriksson commented on CASSANDRA-5061:
--------------------------------------------

ah! it comes back due to the commitlog being replayed after reading up the 
schema
                
> Upgraded cassandra loses all cfs on restart
> -------------------------------------------
>
>                 Key: CASSANDRA-5061
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5061
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.1.7
>            Reporter: Marcus Eriksson
>            Assignee: Marcus Eriksson
>         Attachments: 0001-flush-data-after-fixing-nano-timestamps.patch
>
>
> A bit dramatic summary, but hey;
> If you upgrade cassandra and then restart it, you lose all your CFs, but they 
> come back if you restart again.
> This is due to fixSchemaNanoTimestamp not flushing the new data after 
> truncating the CF and re-doing the mutations.

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