Configure Remote Tomcat Debugging in IDEA on CentOS

Environment: CentOS 6.5, Tomcat 7.0, IntelliJ IDEA.

Remote Tomcat Settings

1. Add the following line to catalina.sh under CATALINA_OPTS:

CATALINA_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,address=60222,suspend=n,server=y"

2. The address=60222 defines the debug port that will be used in IDEA.

IDEA Configuration

1. Add a new Tomcat Server and select Remote .

2. Set the remote Tomcat IP and port (e.g., xxx.xxx.152.67:8080 or a domain) and the debug port 60222. Choose same file system for Remote staging to keep local and remote code synchronized.

3. In Startup/Connection , select Debug , Socket , and set the debug port to 60222.

4. Choose Run and click the debug button (Tomcat must be started first).

5. Verify the connection: the IDE shows a successful connection and Tomcat logs appear.

Troubleshooting

If the port is refused, Tomcat may not be running; restart Tomcat.

If connection fails for other reasons, check the debug port usage on the server. If a process is occupying the port, terminate it (e.g., kill -9 12064) and restart Tomcat, then retry debugging in IDEA.