[jira] [Created] (CASSANDRA-21496) RemoveNodeStreams and ReconfigureCMS RESTORE_REPLICA_COUNT streams received by replicas are mis-parsed as OTHER.

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

Aleksey Yeschenko created CASSANDRA-21496:
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             Summary: RemoveNodeStreams and ReconfigureCMS RESTORE_REPLICA_COUNT streams received by replicas are mis-parsed as OTHER.
                 Key: CASSANDRA-21496
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-21496
             Project: Apache Cassandra
          Issue Type: Bug
            Reporter: Aleksey Yeschenko


{{RemoveNodeStreams#startStreaming()}} and {{ReconfigureCMS#streamRanges()}} build an {{INITIATE_DATA_MOVEMENTS_REQ}} payload
whose {{streamOperation}} field is set to {{StreamOperation.RESTORE_REPLICA_COUNT.name()}}, i.e. the enum constant name {{RESTORE_REPLICA_COUNT}}.

{{DataMovementVerbHandler#doVerb()}} on the receiver parses that string with {{StreamOperation.fromString(message.payload.streamOperation))}},
incorrectly getting {{StreamOperation.OTHER}} (since {{"RESTORE_REPLICA_COUNT" != "Restore replica count"}}).

Current impact: this causes MVs to require rebuild unnecessarily on removenode.
Future impact: this affects CEP-45 topology change logic. I have a temporary workaround there but it's inelegant.



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