We are experiencing following issues with Cassandra on our kubernetes clusters:
```
@ kubectl exec -it cassandra-cassandra-0 -- tail /var/log/cassandra/debug.log
DEBUG [MessagingService-Outgoing-localhost/127.0.0.1-Gossip] 2017-12-05
09:02:06,560 OutboundTcpConnection.java:545 - Unable to connect to
localhost/127.0.0.1
java.net.ConnectException: Connection refused
at sun.nio.ch.Net.connect0(Native Method) ~[na:1.8.0_131]
at sun.nio.ch.Net.connect(Net.java:454) ~[na:1.8.0_131]
at sun.nio.ch.Net.connect(Net.java:446) ~[na:1.8.0_131]
at
sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648) ~[na:1.8.0_131]
at
org.apache.cassandra.net.OutboundTcpConnectionPool.newSocket(OutboundTcpConnectionPool.java:146)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.net.OutboundTcpConnectionPool.newSocket(OutboundTcpConnectionPool.java:132)
~[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.net.OutboundTcpConnection.connect(OutboundTcpConnection.java:433)
[apache-cassandra-3.11.0.jar:3.11.0]
at
org.apache.cassandra.net.OutboundTcpConnection.run(OutboundTcpConnection.java:262)
[apache-cassandra-3.11.0.jar:3.11.0]
```
Basically, it’s tons and tons of the same message over and over (on all
clusters, all C* nodes). It tries roughly 4-5 times a second to open a tcp
connection to localhost (?) for gossiping.
What we know:
- does not happen on Cassandra 3.0.15, but happen on 3.11.1 (same
configuration).
- does happen even on minikube-single-Cassandra “cluster”.
- does not happen on docker-compose Cassandra cluster, only on kubernetes one.
Our configuration is pretty much this helm chart:
https://github.com/kubernetes/charts/blob/master/incubator/cassandra/values.yaml
Do you have any idea what it could be related to?
