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You'd have to handle your own exceptions that are thrown so that the ROS internal system isn't catching them for you (or not catching them). The exceptions you throw and don't catch in callbacks are being processed on the node executor thread.

Instead, you could have the callback simply buffer the data into an internal variable which you can call a function to interpret and process on a timer or in another thread which you can throw and catch your own exceptions while processing them in a context which you can do something contextually about.