Using Tomcat 5, and put a breakpoint in a JSP.
Set a breakpoint on a JSP, switch (open) to another Java class or JSP in the project, then close (& save) Eclipse & restart Eclipse.
Then start the server, and run the webapp so that the breakpoint will be executed.
When it hits the breakpoint, the debugger is called. However…
When the focus is switched to Eclipse, the JSP/breakpoint location are not jumped to. I simply goes to where you left off when you opened Eclipse.
Secondly, when you do go to where the focus is (at the breakpoint). Hitting the function keys to navigate (f6) instead of the menu drop-down does not work, until you use the menu drop-down to do the Step-Over. Then the f6 key will work.