Cassandra port usage - how are the ports used

Question

When experimenting with Cassandra I ve observed that Cassandra listens to the following ports    TCP   8080 TCP   8888 TCP   57311 TCP   57312 TCP 127 0 0 1 7000 TCP 127 0 0 1 9160 UDP 127 0 0 1 700   How does Cassandra use each of the ports listed

User · Answer

For Apache Cassandra 2 0 you need to take into account the following TCP ports   See EC2 security group configuration and Apache Cassandra FAQ   Cassandra   7199 JMX monitoring port 1024 - 65355 Random port required by JMX  Starting with Java 7u4 a specific port can be specified using the com sun management jmxremote rmi port property  7000 Inter-node cluster 7001 SSL inter-node cluster 9042 CQL Native Transport Port 9160 Thrift   DataStax OpsCenter   61620 opscenterd daemon 61621 Agent 8888 Website   Architecture  A possible architecture with Cassandra   OpsCenter on EC2 could look like this

User · Answer

Schildmeijer is largely right  however port 7001 is still used when using TLS Encrypted Internode communication  So my complete list would be for current versions of Cassandra    7199 - JMX  was 8080 pre Cassandra 0 8 xx  7000 - Internode communication  not used if TLS enabled  7001 - TLS Internode communication  used if TLS enabled  9160 - Thrift client API 9042 - CQL native transport port

User · Answer

I resolved issue using below steps     Stop cassandara services  sudo su - systemctl stop datastax-agent systemctl stop opscenterd systemctl stop app-dse  Take backup and Change port from 9042 to 9035  cp  opt dse resources cassandra conf cassandra yaml  opt dse resources cassandra conf bkp cassandra yaml Vi  opt dse resources cassandra conf cassandra yaml native transport port  9035  Start Cassandra services  systemctl start datastax-agent systemctl start opscenterd systemctl start app-dse  create cqlshrc file   vi   root  cassandra cqlshrc   connection  hostname   198 168 1 100 port   9035    Thanks  Mahesh

User · Answer

JMX now uses port 7199 instead of port 8080  as of Cassandra 0 8 xx    This is configurable in your cassandra-env sh file  but the default is 7199

User · Answer

Ports 57311 and 57312 are randomly assigned ports used for RMI communication  These ports change each time Cassandra starts up  but need to be open in the firewall  along with 8080 7199  depending on version   to allow for remote JMX access  Something that doesn t appear to be particularly well documented  but has tripped me up in the past

User · Answer

8080 - JMX  remote   8888 - Remote debugger  removed in 0 6 0   7000 - Used internal by Cassandra  7001 - Obsolete  removed in 0 6 0  Used for membership communication  aka gossip   9160 - Thrift client API  Cassandra FAQ What ports does Cassandra use

User · Answer

In addition to the above answers  as part of configuring your firewall  if you are using SSH then use port 22

[nosql] Cassandra port usage - how are the ports used?

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