'-P' option doesn't forward hub container exposed port

[danggrianto]

when i run this command docker run -P -d --name selenium-hub selenium/hub i cant access hub console. I did this command instead docker run -d -p 4444:4444 --name selenium-hub selenium/hub and i can access the console at localhost:4444

[mtscout6]

See the docker documentation on docker run -P

When using -P, Docker will bind the exposed ports to a random port on the host between 49153 and 65535. To find the mapping between the host ports and the exposed ports, use docker port.