Robbie Strickland created CASSANDRA-7252:
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Summary: 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: Robbie Strickland
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. 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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