This fixes a nil pointer dereference that can occur if a request is made
of the API before the exception routine has initialized the radix tree.
Prior to this, heartbeat/lbheartbeat requests would still return success even if the exception tree hadn't been populated, and it would cause the service to crash upon first request that was not a heartbeat.
This fixes a nil pointer dereference that can occur if a request is made of the API before the exception routine has initialized the radix tree.
Prior to this, heartbeat/lbheartbeat requests would still return success even if the exception tree hadn't been populated, and it would cause the service to crash upon first request that was not a heartbeat.