Remote debug docker+wildfly with intelliJ 2017.2.6

Question

So there are a lot of posts around this subject, but none of which seems to help.

I have an application running on a wildfly server inside a docker container. And for some reason I cannot connect my remote debugger to it.

So, it is a wildfly 11 server that has been started with this command:

/opt/jboss/wildfly/bin/standalone.sh -b 0.0.0.0 -bmanagement 0.0.0.0 -c standalone.xml --debug 9999;

And in my standalone.xml I have this:

<socket-binding name="management-http" interface="management" port="${jboss.management.http.port:9990}"/>

The console output seems promising: Listening for transport dt_socket at address: 9999

I can even access the admin console with the credentials admin:admin on localhost:9990/console

However IntelliJ refuses to connect... I've creates a remote JBoss Server configuration that in the server tab points to localhost with management port 9990. And in the startup/connection tab I've entered 9999 as remote socket port.

The docker image has exposed the ports 9999 and 9990, and the docker-compose file binds those ports as is.

Even with all of this IntelliJ throws this message when trying to connect:

Error running 'remote':
Unable to open debugger port (localhost:9999): java.io.IOException "handshake failed - connection prematurally closed"

followed by

Error running 'remote':
Unable to connect to the localhost:9990, reason:
com.intellij.javaee.process.common.WrappedException: java.io.IOException: java.net.ConnectException: WFLYPRT0053: Could not connect to remote+http://localhost:9990. The connection failed

I'm completely lost as to what the issue might be...

Interessting addition is that after intelliJ fails, if I invalidate caches and restart then wildfly reprints the message saying that it is listening on port 9999

Answer 1

In case someone else in the future comes to this thread with he same issue, I found this solution here: https://github.com/jboss-dockerfiles/wildfly/issues/91#issuecomment-450192272

Basically, apparart from the --debug parameter, you also need to pass *:8787

Dockerfile:

CMD ["/opt/jboss/wildfly/bin/standalone.sh", "-b", "0.0.0.0", "-bmanagement", "0.0.0.0", "--debug", "*:8787"]

docker-compose:

ports:
    - "8080:8080"
    - "8787:8787"
    - "9990:9990"
command: /opt/jboss/wildfly/bin/standalone.sh -b 0.0.0.0 -bmanagement 0.0.0.0 --debug *:8787

I have not tested the docker-compose solution, as my solution was on dockerfile.