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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-3401) Region IPC operations should be high priority
Date Thu, 30 Dec 2010 19:56:45 GMT
Region IPC operations should be high priority

                 Key: HBASE-3401
                 URL: https://issues.apache.org/jira/browse/HBASE-3401
             Project: HBase
          Issue Type: Bug
          Components: regionserver
    Affects Versions: 0.90.1
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
             Fix For: 0.90.1

I manufactured an imbalanced cluster so one region server had 300 regions and the others had
very few. I then ran balancer while hitting the high-load region server with YCSB. I observed
that the rate of load shedding was VERY slow since the closeRegion IPCs were getting stuck
at the back of the IPC queue.

All of these important master->RS RPC calls should be set to high priority.

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