Service Start/Restart Failures Because of Reserved Ports
Big Data Service fails to start.
Big Data Service fails to start because of the errors such as Port already in use: <port> or to avoid services using ports which are already reserved for JMX enabling and so forth.
Find reserved ports used by the system. Run:
sysctl -n net.ipv4.ip_local_reserved_ports
Copy the output of the preceding command and append the ports that you have enabled for JMX or any similar use cases. Run the following command through dcli to update on all nodes:
Changes made using sysctl -w are temporary and don't persist after a reboot. To make them permanent, edit /etc/sysctl.conf by using vim or nano as sudo and reload the configuration by running sudo sysctl -p.
Note
For new node addition, you can use the bootstrap script to perform the preceding commands programmatically.