실행시 no port is available about ngrinder

[imbyungjun]

You need to describe your env like JDK version, OS ...

Anyway, add the following to ${NGRINDER_HOME}/system.conf and try running it again.

controller.ip=127.0.0.1

[BGHyeon]

sorry for late
my JDK version is 11.0.4 and mac Os is Monterey 12.5
i add system.conf in ngrinder_home but not working it...

[imbyungjun]

Default ngrinder controller config file is located in ~/.ngrinder/system.conf. Please make sure you chage the config file.

[imbyungjun]

@BGHyeon
Do you use a VPN or change your DNS configuration?
After trying some cases on this issue, it doesn't seem like an application bug.

First of all, the main cause of "no port is available" error is InetAddress.getLocalHost() returns wrong IP address.
Available port check tries to accquire some local port with IP and port, if InetAddress.getLocalHost() returns wrong IP address, nGrinder tries to acquire a port with wrong IP address. So, nGrinder cannot acquire any ports and then "no port
is available" error occurs.

In my case, I used a VPN and I could reproduce the issue when VPN connected or disconnected.
But, when I connected with another VPN, InetAddress.getLocalHost() starts to work properly. So, I started to suspect that this issue is related to DNS configuration. Then, I changed DNS configuration to Google DNS, after changing to Google DNS this issue did not occur.

Could you run nGrinder after changing your DNS configuration as described in here?

Or you can change /etc/hosts as described in here to solve the issue.