Port is already allocated

When I try to run the XL JetPack Release Docker image, I see this error:

Error starting userland proxy: Bind for failed: port is already allocated.

This error means that you already have something running on port 5516. XebiaLabs uses ports 4516 and 5516 by default, so if you have another XebiaLabs product instance or container running, that could be the issue.

If you don’t want to kill the process that’s using the port, you can use the -p flag to configure a different port mapping in your docker run command. See Container networking for more information.