how to start tomcat debug port in windows while debugging tomcat application

java tomcat remote-debugging

13,222

Solution 1

Basic config is: In catalina.bat under tomcat/bin file modify the below.

CATALINA_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n"
JPDA_OPTS="-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n"
Run Tomcat from command prompt: catalina.sh jpda start

Then in eclipse create a debug configuration:

Write any name for the configuration.
Write the project name.
Write the connection type as Standard(Socket Attach)
Host should be localhost
Port as 8000( or any port number, but that should be the same in other places also).

see: Remote debugging Tomcat with Eclipse

Solution 2

When run as windows service, Tomcat's command line options could be stored in registry at HKLM\Software\Wow6432Node\Apache Software Foundation\Procrun 2.0\TomcatServiceName path for 64-bit OS and at HKEY_LOCAL_MACHINE\Software\Apache Software Foundation\Procrun 2.0\tomcat8 for 32-bit.

See Where does Tomcat7w.exe store Settings on Windows.

Those settings can be viewed and changed via running bin\tomcatw.exe.

13,222

Author by

ThinkTank

By Day: I will be available but I am not answering that means I am in the different timezone. By Night: I sleep like the hog. Interests: Learning new things which keeps me updated, and love mountains and trekking.

Updated on June 28, 2022

Comments

ThinkTank about 2 years
I'm getting Exception while debugging
```
Failed to connect to remote VM. Connection refused.
Connection refused: connect.
```
i have tried command in windows system

netstat -n -a -p tcp

but my port 8787 was not there how to start that port.
ThinkTank about 8 years

by default eclipse is taking 1043 as a port now. how i don't know?? when i am trying to do with eclipse UI but now it is taking default port where it is defined?
KlajdPaja about 8 years

No one else has given a hint so I'll give a shot by searching for JPDA_OPTS in all .bat files inside bin but it should be in catalina.bat or setenv.bat
ThinkTank about 8 years

dt_socket port is by default at startup 1043 how please help me. while manually starting tomcat 7.
KlajdPaja about 8 years

If you start it manually specify the port like this, in windows: bin\startup.bat -debug 8000
ThinkTank about 8 years

then i get socket error but after configuring in eclipse port number 1043. when manually starting it takes 1043 as port number.
KlajdPaja about 8 years

well that might be because the port is being used by another process, so try another port or kill that process
ThinkTank about 8 years

after using telnet i am not able see that port also
ThinkTank over 7 years

Thanks,I have changes in catalina.bat also seen many options such as -Xmx,-XX:PermSize etc thanks again.