When you complete the Debugger Wizard, the Integration Service starts the session and initializes the Debugger. After initialization, the Debugger moves in and out of running and paused states based on breakpoints and commands that you issue from the Mapping Designer. The Debugger can be in one of the following states:
Initializing.
The Designer connects to the Integration Service.
Running.
The Integration Service processes the data.
Paused.
The Integration Service encounters a break and pauses the Debugger.
To enable multiple users to debug the same mapping at the same time, each user must configure different port numbers in the Tools > Options > Debug tab.
The Debugger does not use the high availability functionality.