During a session, the mapping displays the indicators in the top left corner of transformations that help you monitor breakpoints, data flow, and Debugger status:
After the Integration Service completes initialization, it reads the breakpoints in the mapping and displays a stop sign on each transformation to indicate breakpoint conditions. You can view breakpoint indicators while the Debugger is in the running or paused state. The Mapping Designer does not display global breakpoint indicators.
Current source qualifier indicator.
When the Integration Service runs the Debugger, it processes data from each source qualifier in a target load order group concurrently by default. The Mapping Designer displays a flashing arrow on all current source qualifiers.
You can configure the Integration Service to read sources connected to Joiner transformations sequentially.
Current transformation indicator.
The Debugger displays a solid yellow arrow that indicates the transformation or mapplet that the Integration Service was processing when it encountered a break. This transformation is called the current transformation. The Debugger displays a solid blue arrow at all other transformations that the Integration Service was processing when it encountered a break at the current transformation.
When you start the Debugger, the Mapping Designer displays a Debugger icon by the tool bars that indicates the Debugger state. When the Debugger is initializing or running, the icon rotates. When the Debugger is paused, the icon stops.