问题
I have I have configured Eclipse 2020-06 to deploy to a Wildfly 20 Service running on a remote Ubuntu 20 VM. Doing this created a Remote Debug Configuration.
When I Run that Remote Debug Configuration I instantly get the error: Failed to connect to remote VM. Connection refused. Connection refused: connect
Here are what I think are important facts:
Wildfly is running as a service @ 192.168.1.19.
I have uncommented the JAVA_OPTS line in standalone.conf so that the service starts up in Debug on port 8787. I confirm this with:
ps -aux | grep wildfly
wildfly 19124 0.0 0.0 18208 2816 ? Ss 16:41 0:00 /bin/bash /opt/wildfly/bin/launch.sh standalone standalone.xml 0.0.0.0 wildfly 19134 0.0 0.0 2612 1560 ? S 16:41 0:00 /bin/sh /opt/wildfly/bin/standalone.sh -c standalone.xml -b 0.0.0.0 wildfly 19238 8.3 23.3 1724264 936448 ? Sl 16:41 3:52 java -D[Standalone] -server -Xms64m -Xmx512m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true -agentlib:jdwp=transport=dt_socket,address=0.0.0.0:8787,server=y,suspend=n --add-exports=java.base/sun.nio.ch=ALL-UNNAMED --add-exports=jdk.unsupported/sun.misc=ALL-UNNAMED --add-exports=jdk.unsupported/sun.reflect=ALL-UNNAMED -Dorg.jboss.boot.log.file=/opt/wildfly/standalone/log/server.log -Dlogging.configuration=file:/opt/wildfly/standalone/configuration/logging.properties -jar /opt/wildfly/jboss-modules.jar -mp /opt/wildfly/modules org.jboss.as.standalone -Djboss.home.dir=/opt/wildfly -Djboss.server.base.dir=/opt/wildfly/standalone -c standalone.xml -b 0.0.0.0 wizard 20383 0.0 0.0 17664 664 pts/3 S+ 17:27 0:00 grep --color=auto wildfly
In Eclipse, the Remote Debug Configuration shows: Host = 192.168.1.19 Port = 8787
In the Remote Systems View I can select 192.168.1.19 and sftp Files and I am able to roam the file system on the Wildfly server so I know there is connectivity between the two systems.
As soon as I run the Remote Debug Configuration I instantly get the error.
One question is where do I provide credentials for the Remote Debug Configuration? I would expect that that is needed to allow connection.
Wildfly is running in debug mode on 8787 and the Remote Debug Configuration uses 8787 so what is going wrong here?
Thank you in advance.
来源：https://stackoverflow.com/questions/63729523/attempt-to-debug-a-remote-wildfly-20-server-failing