Cannot start dremio executor

Hello,

My dremio master node works fine, but I cannot open dremio executor because

 Could not bind to port 45678 

I tried to kill the process using port 45678 in master node or executor node. But the issue still unsolved.

Can I change the port in config file? what is the dremio-env to change the port and should i make change on master or executor?

Thank you.