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From Anuj Wadehra <>
Subject Re: Cassandra's log is full of mesages reset by peers even without traffic
Date Fri, 29 Jan 2016 10:02:21 GMT
Hi Jean,
Please make sure that your Firewall is not dropping TCP connections which are in use. Tcp
keep alive on all nodes must be less than the firewall setting. Please refer to for
details on TCP settings.


Sent from Yahoo Mail on Android 
  On Fri, 29 Jan, 2016 at 3:21 pm, Jean Carlo<> wrote:   Hello

I have a cluster cassandra 2.1.12 with 6 nodes. All the logs of my nodes are having this messages
marked as INFO

INFO  [SharedPool-Worker-1] 2016-01-29 10:40:57,745 - Unexpected exception
during request; channel = [id: 0xff15eb8c, /] Error while read(...): Connection reset by peer
    at Method) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
    at ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
    at ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$
    at io.netty.util.concurrent.DefaultThreadFactory$
    at [na:1.8.0_60]

This happens either the cluster is stressed or not. Btw it is not production. The ip marked
there ( belongs to a node of the cluster, this is not the only node that appears,
acctually we are having all the node's ip having that reset by peer problem.

Our cluster is having more reads than writes. like 50 reads per second. 

Any one got the same problem?

Best regards

Jean Carlo
"The best way to predict the future is to invent it" Alan Kay

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