What is the process for troubleshooting unsuccessful mapping of host ports in a container?

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If a port mapping in a container fails, the following steps can be followed to troubleshoot the issue:

1. Check the container and host networking configuration to ensure that they are using the correct network.

2. Make sure that the host port specified is not already in use by another process.

3. Verify that the port is properly configured in the application running inside the container.

4. Check the container logs to see if any errors related to port mapping have been reported.

5. Use the docker ps command to check whether the container is running and that the port mapping has been applied.

6. Verify that the host firewall is not blocking the incoming traffic for the specified port.

7. If the container is running on a remote host, check if there is a network connectivity issue between the container and the host.

8. Try restarting the container to see if that resolves the issue.

Finally, if all else fails, consult the Docker documentation, community forums, or seek the help of a Docker expert for further assistance.