[jira] [Created] (KAFKA-2504) Stop logging WARN when client disconnects

[Gwen Shapira (JIRA)]

Gwen Shapira created KAFKA-2504:
-----------------------------------

             Summary: Stop logging WARN when client disconnects
                 Key: KAFKA-2504
                 URL: https://issues.apache.org/jira/browse/KAFKA-2504
             Project: Kafka
          Issue Type: Bug
            Reporter: Gwen Shapira


I thought we fixed this one, but it came back. This can be fill logs and is 
fairly useless. Should be logged at DEBUG level:

{code}
[2015-09-02 12:05:59,743] WARN Error in I/O with connection to /10.191.0.36 
(org.apache.kafka.common.network.Selector)
java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
        at sun.nio.ch.IOUtil.read(IOUtil.java:197)
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
        at 
org.apache.kafka.common.network.PlaintextTransportLayer.read(PlaintextTransportLayer.java:111)
        at 
org.apache.kafka.common.network.NetworkReceive.readFromReadableChannel(NetworkReceive.java:81)
        at 
org.apache.kafka.common.network.NetworkReceive.readFrom(NetworkReceive.java:71)
        at 
org.apache.kafka.common.network.KafkaChannel.receive(KafkaChannel.java:154)
        at 
org.apache.kafka.common.network.KafkaChannel.read(KafkaChannel.java:135)
        at org.apache.kafka.common.network.Selector.poll(Selector.java:296)
        at kafka.network.Processor.run(SocketServer.scala:405)
        at java.lang.Thread.run(Thread.java:745)
{code}





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