# File lib/phusion_passenger/public_api.rb, line 76
        def log_request_exception(env, exception, options = nil)
                return if !env[PASSENGER_TXN_ID]
                core = lookup_union_station_core(env)
                if core
                        transaction = core.new_transaction(
                                env[PASSENGER_APP_GROUP_NAME],
                                :exceptions,
                                env[PASSENGER_UNION_STATION_KEY])
                        begin
                                request_txn_id = env[PASSENGER_TXN_ID]
                                message = exception.message
                                message = exception.to_s if message.empty?
                                message = [message].pack('m')
                                message.gsub!("\n", "")
                                backtrace_string = [exception.backtrace.join("\n")].pack('m')
                                backtrace_string.gsub!("\n", "")

                                transaction.message("Request transaction ID: #{request_txn_id}")
                                transaction.message("Message: #{message}")
                                transaction.message("Class: #{exception.class.name}")
                                transaction.message("Backtrace: #{backtrace_string}")

                                if options && options[:controller_name]
                                        if options[:action_name]
                                                controller_action = "#{options[:controller_name]}##{options[:action_name]}"
                                        else
                                                controller_action = controller_name
                                        end
                                        transaction.message("Controller action: #{controller_action}")
                                end
                        ensure
                                transaction.close
                        end
                end
        end