title: Cassandra :: Unexpected exception during request; channel = [id: 0x7acf3f0c, L:/100.55.10.124:9042 ! R:/30.75.50.2:39263]
body: <p>I'm using Cassandra 3.10 with 6 Nodes cluster having replication Factor 2.  [please consider the IP's have been masked and not original].</p>
  
  <pre><code>Datacenter: DC1
  ===========================================
  Status=Up/Down
  |/ State=Normal/Leaving/Joining/Moving
  --  Address       Load       Tokens       Owns (effective)  Host ID                               Rack
  UN  100.55.10.124  212.33 MiB  256          65.9%             8328123a-678c-4027-a136-06b3626ab017  rack1
  UN  100.55.10.125  216.92 MiB  256          67.1%             af76123c-6880-43d6-bff8-b139731242bd  rack1
  UN  100.55.10.126  216.94 MiB  256          67.0%             f541cdc1-aa2f-4a30-3612-5d4291421ec3  rack1
  Datacenter: DC2
  ===========================================
  Status=Up/Down
  |/ State=Normal/Leaving/Joining/Moving
  --  Address       Load       Tokens       Owns (effective)  Host ID                               Rack
  UN  100.55.10.130  198.15 MiB  256          60.7%             332eb914-bf14-4d0d-9c38-47fc4b0952f1  rack2
  UN  100.55.10.131  229.48 MiB  256          70.8%             cafc702f-83d4-479a-b117-ada75274e0ba  rack2
  UN  100.55.10.132  223.14 MiB  256          68.5%             8a9c03ae-ed5a-4cb9-9540-0ca97a04640e  rack2
  </code></pre>
  
  <p>cluster was working fine, but these days i see below "INFO" in the system logs </p>
  
  <pre><code>INFO  [Native-Transport-Requests-3] 2017-04-19 03:21:19,684 Message.java:617 - Unexpected exception during request; channel = [id: 0x7acf3f0c, L:/100.55.10.124:9042 ! R:/30.75.50.2:39263]
  io.netty.channel.unix.Errors$NativeIoException: syscall:read(...)() failed: Connection reset by peer
          at io.netty.channel.unix.FileDescriptor.readAddress(...)(Unknown Source) ~[netty-all-4.0.39.Final.jar:4.0.39.Final]
  </code></pre>
  
  <p>I was trying to analyze the issue, but couldn't make it yet. 
  <br/> <br/>
  i've looked at following <a href="https://issues.apache.org/jira/browse/CASSANDRA-11128" rel="noreferrer">JIRA issues</a> around this, but wasn't able to find anything helpful.<br/>
  i've also referred to few stackoverflow links couldnt find anything conclusive.
   <ul></p>
  
  
  <li><a href="https://stackoverflow.com/questions/42477913/unexpected-exception-during-request">Unexpected exception during request</a></li>
  <li><a href="https://stackoverflow.com/questions/42708258/cassandra-timeouts-with-no-cpu-usage">Cassandra Timeouts with No CPU Usage</a></li>
  <li><a href="https://stackoverflow.com/questions/37342719/strange-exception-in-var-log-cassandra-system-log">Strange exception in /var/log/cassandra/system.log</a></li>
  </ul>
  
  <p>i am using CQL v3.4.4. Is there anyone, who is familiar with above scenario? </p>