"Unable to create listener" errors are returned when some other service is utilizing the Broker's UDP or TCP ports; this may be a previously started instance of the Broker, or any other process. If you receive "Unable to create listener" errors, take the following action:
ps -ef | grep oplrqb | grep -v grep
(Unix) or the Task Manager (Windows) to search for a running Broker process.
If you find one, terminate it.
You cannot run two Broker instances on one machine.
netstat -a | grep 60001
from DOS or a UNIX terminal to check whether another service is using UDP Port 60001
.
If so, try to reassign that service, or start the Broker before the other service.
60001
is free, use netstat -a | grep <port-number>
to check the status of the Broker's Listen
and PortLow
TCP ports.
These ports both default to 5000
.
However, you may want to verify your settings.
Take the following action: oplrqb.ini
file.
You will find this file in the /bin
sub-directory of your Multi-Tier server components installation.
[Protocol TCP]
section.
PortLow
and Listen
.
netstat
output.