title: Unexpected exception during request
body: <p>I'm using <code>apache cassandra 2.2.4</code>. I have a 4 (four) node cluster with Replication Factor 3 in DC1 and Replication Factor 1 in DC2, where DC1 contains 3 (three) nodes and DC2 contains 1 (one) node. There were some more nodes before in this cluster, but for some reason I removed them and didn't altered the replication scenario. [Please consider that the following IP's are not original]</p>
  
  <pre><code>Datacenter: DC1
  ===============
  Status=Up/Down
  |/ State=Normal/Leaving/Joining/Moving
  --  Address        Load       Tokens       Owns    Host ID                               Rack
  UN  21.12.19.91    4.08 GB    256          ?       a45bb676-1ddd-4b22-933b-58653cea680f  RAC1
  UN  21.12.19.92    3.92 GB    256          ?       a7735fca-8671-4a20-a759-4a2681aed37e  RAC1
  UN  21.12.19.93    4.47 GB    256          ?       d98f3cad-881a-41c8-89c7-170c63c3d236  RAC1
  Datacenter: DC2
  ===============
  Status=Up/Down
  |/ State=Normal/Leaving/Joining/Moving
  --  Address        Load       Tokens       Owns    Host ID                               Rack
  UN  21.12.19.99    3.84 GB    256          ?       ccd9ca97-f97a-4473-9a65-49b12a1b60ba  RAC1
  </code></pre>
  
  <p>Cluster was working fine, but now-a-days I'm having an issue as <code>INFO</code>. I was trying to analyze the issue, but couldn't make it yet. Is there anyone, who is familiar with following scenario?  </p>
  
  <pre><code>INFO  [SharedPool-Worker-2] 2017-02-26 06:56:48,520 Message.java:605 - Unexpected exception during request; channel = [id: 0x637a702c, /18.12.10.17:60926 :&gt; /21.12.19.91:9042]
  java.io.IOException: Error while read(...): Connection reset by peer
      at io.netty.channel.epoll.Native.readAddress(Native Method) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
      at io.netty.channel.epoll.EpollSocketChannel$EpollSocketUnsafe.doReadBytes(EpollSocketChannel.java:675) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
      at io.netty.channel.epoll.EpollSocketChannel$EpollSocketUnsafe.epollInReady(EpollSocketChannel.java:714) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
      at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:326) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
      at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:264) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
      at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
      at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
      at java.lang.Thread.run(Thread.java:745) [na:1.8.0_66]
  </code></pre>