change default port 8080 maven gae goal appengine:devserver - google-app-engine

Question

I'm having a problem, probably is quite simple but I did not find the solution yet.
I'm trying to launch my local GAE server (through Run-configurations of Eclipse) on a specific port (8888 in my case) but it starts only at default port 8080 and after trying with different options ... I'm not lucky
Any ideas?

Answer 1

Run this from the cmd line: mvn help:describe -Dcmd=appengine:devserver -Ddetail - you'll see all the available options for appengine:devserver goal.
The one that you want is:
mvn appengine:devserver -Dappengine.port=8888

Answer 2

The Google Plugin for eclipse (GPE) allows you to specify the port number on the second tab ('Server') in a run configuration.
If you're not using that (which you probably should be) you can configure the port in your pom directly like this:
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>${gae.version}</version>
<configuration>
<port>8080</port>
<address>0.0.0.0</address>
</configuration>
</plugin>

Answer 3

What have you tried?
Have you tried adding the --port 8888 option to your run configuration?

Answer 4

If you are following the tutorial:
https://cloud.google.com/appengine/docs/standard/java/quickstart
It seems that the documentation has changed:
https://cloud.google.com/appengine/docs/flexible/java/maven
Use <host> instead of <address>
Here is how you bind the host address for Docker:
<plugin>
<groupId>com.google.cloud.tools</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<enableJarClasses>false</enableJarClasses>
<port>8080</port>
<host>0.0.0.0</host>
<admin_host>0.0.0.0</admin_host>
</configuration>
</plugin>