Tomcat remote debugging

You can debug remote server for example from eclipse using JPDA.
For this you need:

in eclipse:
1) just open debug>debug configurations> remote java application

in tomcat in windows we have bin/catalina.bat or in linux bin/catalina.sh

2)  in file head

catalina.bat

set JPDA_ADDRESS=8000

set JPDA_TRANSPORT=dt_socket

 catalina.sh

export JPDA_ADDRESS=8000

export JPDA_TRANSPORT=dt_socket

3) change last line

 catalina.bat

call "%EXECUTABLE%" jpda start %CMD_LINE_ARGS%

 catalina.sh

exec "$PRGDIR"/"$EXECUTABLE" jpda start "$@"