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From "Gary Dusbabek (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-1075) Thrift interface call to query whether all live nodes agree on the schema id
Date Thu, 20 May 2010 15:27:53 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-1075?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gary Dusbabek updated CASSANDRA-1075:
-------------------------------------

    Attachment: 0001-service-call-to-check-for-schema-agreement.patch
                0002-modify-system_-methods-to-return-UUID.patch

synchronizedmap does use itself for the mutex.  I guess there's no point of locking for reads
though.

> Thrift interface call to query whether all live nodes agree on the schema id
> ----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-1075
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1075
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>    Affects Versions: 0.7
>            Reporter: Benjamin Black
>            Assignee: Gary Dusbabek
>            Priority: Minor
>             Fix For: 0.7
>
>         Attachments: 0001-service-call-to-check-for-schema-agreement.patch, 0002-modify-system_-methods-to-return-UUID.patch
>
>
> Schema changes via the Thrift interface reach all nodes in a cluster at indeterminate
times.  It would be extremely useful to be able to query, via API, a single node in the cluster
and discover the current state of a transition to determine if all live nodes agree on the
schema.

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