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https://issues.apache.org/jira/browse/CASSANDRA-7252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robbie Strickland reassigned CASSANDRA-7252:
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Assignee: Jonathan Ellis (was: Robbie Strickland)
> RingCache cannot be configured to use local DC only
> ---------------------------------------------------
>
> Key: CASSANDRA-7252
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7252
> Project: Cassandra
> Issue Type: Bug
> Components: Hadoop
> Reporter: Robbie Strickland
> Assignee: Jonathan Ellis
> Labels: patch
> Fix For: 2.0.7
>
> Attachments: cassandra-2.0.7-7252-2.txt, cassandra-2.0.7-7252.txt
>
>
> RingCache always calls describe_ring, returning the entire cluster.
> Considering it's used in the context of writing from Hadoop (which is
> typically in a multi-DC configuration), this is often not desirable behavior.
> In some cases there may be high-latency connections between the analytics DC
> and other DCs.
> I am attaching a patch that adds an optional config value to tell RingCache
> to use local nodes only, in which case it calls describe_local_ring instead.
> It also adds helpful failed host information to IOExceptions thrown in
> AbstractColumnFamilyOutputFormat.createAuthenticatedClient, CqlRecordWriter,
> and ColumnFamilyRecordWriter. This allows a user to more easily solve
> related connectivity issues.
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