Gwen Shapira created FLUME-2632:
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             Summary: High CPU on KafkaSink
                 Key: FLUME-2632
                 URL: https://issues.apache.org/jira/browse/FLUME-2632
             Project: Flume
          Issue Type: Bug
            Reporter: Gwen Shapira


Reported here: https://github.com/harishreedharan/flume/issues/1

"I tried flume-ng-kafka-sink and it worked fine. But I noticed that the cpu 
utilization stay at 100% and never dropped down all the time even at the time 
the channel is empty.

I looked into the source code and found that "process" function in KafkaSink 
always return Status.READY even if no events available in channel. That causes 
the SinkRunner keep running achieving event from channel and get nothing.

Do we need to change to return Status.BACKOFF in "process" function in 
KafkaSink when it notices that there is no events processed in current round? 
So that the SinkRunner has a chance to take a rest when there is no event in 
channel. If this proposal feasible, function "testEmptyChannel" in 
TestKafkaSink also need to be changed. "



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