[jira] [Commented] (CASSANDRA-5904) Don't announce schema version until we've loaded the changes locally

["Aleksey Yeschenko (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-5904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13744979#comment-13744979 ] 

Aleksey Yeschenko commented on CASSANDRA-5904:
----------------------------------------------

+1
                
> Don't announce schema version until we've loaded the changes locally
> --------------------------------------------------------------------
>
>                 Key: CASSANDRA-5904
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5904
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 1.2.9
>
>         Attachments: 5904.txt
>
>
> Currently, we call updateSchemaAndAnnounce (which sets the schema version in the system table and announce it on gossip) in DefsTable.mergeSchema as soon as we've persisted the schema mutation but *before* we've actually loaded new/updated KS/CF locally. This makes it impossible to reliably check for schema agreement in a cluster as even if all nodes have the same version set in the system tables, you could still get an insert on a new table rejected because the table hasn't been loaded yet.

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