[jira] [Created] (HBASE-22559) [RPC] set guard against CALL_QUEUE_HANDLER_FACTOR_CONF_KEY

["Reid Chan (JIRA)" <ji...@apache.org>]

Reid Chan created HBASE-22559:
---------------------------------

             Summary: [RPC] set guard against CALL_QUEUE_HANDLER_FACTOR_CONF_KEY
                 Key: HBASE-22559
                 URL: https://issues.apache.org/jira/browse/HBASE-22559
             Project: HBase
          Issue Type: Bug
          Components: rpc
            Reporter: Reid Chan
            Assignee: Reid Chan


CALL_QUEUE_HANDLER_FACTOR_CONF_KEY is {{hbase.ipc.server.callqueue.handler.factor}}, a float number, which is supposed between [0.0, 1.0].

If it is greater than 1, for example, 2.0, the call queues and handlers will be expanded twice:
{code}
float callQueuesHandlersFactor = this.conf.getFloat(CALL_QUEUE_HANDLER_FACTOR_CONF_KEY, 0);
this.numCallQueues = computeNumCallQueues(handlerCount, callQueuesHandlersFactor);
this.handlerCount = Math.max(handlerCount, this.numCallQueues);

protected int computeNumCallQueues(final int handlerCount, final float callQueuesHandlersFactor) {
  return Math.max(1, (int) Math.round(handlerCount * callQueuesHandlersFactor));
}
{code}

We already have {{hbase.regionserver.handler.count}} set, what mentioned above looks tricky.



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