[jira] [Created] (HBASE-15765) RPC handlers should steal from other queues in the same or higher priority

["Enis Soztutar (JIRA)" <ji...@apache.org>]

Enis Soztutar created HBASE-15765:
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             Summary: RPC handlers should steal from other queues in the same or higher priority
                 Key: HBASE-15765
                 URL: https://issues.apache.org/jira/browse/HBASE-15765
             Project: HBase
          Issue Type: Improvement
            Reporter: Enis Soztutar


With the simple rpc scheduler model by default, a request first falls in one type of queue (priority, general, replication) and it will get "sharded" in a queue within that priority level (for example there are 2 queues for the high priority level). The handlers can only take from their specific queues, and nothing else. 

Even if a request is waiting in a high priority queue, the handlers within the same priority level or a lower priority level will not see these requests (which is the root cause for HBASE-15613). We should be able to steal from other queues, without losing the prioritization and sharding benefits. 



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