cassandra nodetool : Failed to connect to '127.0.0.1:7199'

Question

i installed cassandra 3.11.3-1 on centos7 & vmware

i didn't have error while installing cassandra. i started cassandra and faced this logs.

[root@localhost ~]# service cassandra start
Starting cassandra (via systemctl):                        [  OK  ]

[root@localhost ~]# systemctl status cassandra
cassandra.service - LSB: distributed storage system for structured data
Loaded: loaded (/etc/rc.d/init.d/cassandra; bad; vendor preset: disabled)
Active: deactivating (stop) (Result: exit-code) since 2018-08-02 15:15:45 
KST; 6s ago
Docs: man:systemd-sysv-generator(8)
Process: 10366 ExecStart=/etc/rc.d/init.d/cassandra start (code=exited, 
status=0/SUCCESS)
Main PID: 10450 (code=exited, status=3);         : 10478 (cassandra)
Tasks: 2
CGroup: /system.slice/cassandra.service
         └─control
            ├─10478 /bin/bash /etc/rc.d/init.d/cassandra stop
            └─10549 sleep 0.5

 02 15:15:39 localhost.localdomain systemd[1]: Starting LSB: distributed 
 stora....
 02 15:15:39 localhost.localdomain su[10376]: (to cassandra) root on none
 02 15:15:41 localhost.localdomain cassandra[10366]: Starting Cassandra: OK
 02 15:15:41 localhost.localdomain systemd[1]: Started LSB: distributed 
 storag....
  02 15:15:45 localhost.localdomain systemd[1]: cassandra.service: main 
 process...D
 02 15:15:45 localhost.localdomain su[10489]: (to cassandra) root on none
 02 15:15:45 localhost.localdomain cassandra[10478]: Shutdown Cassandra: 
 bash: …
 Hint: Some lines were ellipsized, use -l to show in full.

it means 'cassandra starting is ok' right? but when i check the node status like this "nodetool status"

then i met this logs.

    "] nodetool status" 
nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 
Connection refused)

so i searched a lot on google. i found some information. so i tried this.

1. edit cassandra-env.sh "JVM_OPTS -Djava.rmi.server.hostname=127.0.0.1"
2. expend memory size : 1GB -> 2GB

but i still faced same error.

someone help me please.

------------- system.log ----------------------------------

INFO [main] 2018-08-02 15:15:44,866 YamlConfigurationLoader.java:89 - Configuration location: file:/etc/cassandra/default.conf/cassandra.yaml

ERROR [main] 2018-08-02 15:15:45,043 CassandraDaemon.java:708 - Exception encountered during startup: Invalid yaml: file:/etc/cassandra/default.conf/cassandra.yaml Error: while scanning a simple key; could not found expected ':'; in 'reader', line 601, column 1:

Set listen_address OR listen_i ...

Answer 1

First, you need to make sure that the activated version of OpenJDK should be openjdk-8-jdk. If you have multiple versions of OpenJDK on your machine, then you could follow this tutorial to set a default version (in this case openjdk-8-jdk).

Then, you need to check the status of cassandra service again. The result for activating cassandra service should be as following

After that, you can follow this instruction to modify JVM_OPTS in /etc/cassandra/cassandra-env.sh. In my case, I do not need to follow 2nd step. Finally, when checking status of a node, you should see the result as following