Hi,

We are replaying our data on Local mode storm cluster. 
Using jvisualvm, we find most CPU are used by following methods (about 60% CPU time):

org.apache.storm.shade.org.apache.zookeeper.server.NIOServerCnxnFactory.run()
org.apache.storm.shade.org.apache.zookeeper.ClientCnxnSocketNIO.doTransport()

Is there any approaches to optimize the performance?

Thanks
Shawn

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