Merge pull request #7113 from rabbitmq/mqtt-debug-log

Author: michaelklishin

deps/rabbitmq_mqtt/src/rabbit_mqtt_reader.erl

@@ -365,7 +365,8 @@ process_received_bytes(Bytes,
                     {stop, normal, {_SendWill = false, pstate(State, ProcState1)}}
             end;
         {error, {cannot_parse, Reason, Stacktrace}} ->
-            ?LOG_ERROR("MQTT cannot parse a packet on connection '~ts', reason: ~tp, "
+            ?LOG_ERROR("Unparseable MQTT packet received from connection ~ts", [ConnName]),
+            ?LOG_DEBUG("MQTT cannot parse a packet on connection '~ts', reason: ~tp, "
                        "stacktrace: ~tp, payload (first 100 bytes): ~tp",
                        [ConnName, Reason, Stacktrace, rabbit_mqtt_util:truncate_binary(Bytes, 100)]),
             {stop, {shutdown, Reason}, State};

deps/rabbitmq_web_mqtt/src/rabbit_web_mqtt_handler.erl

@@ -286,7 +286,7 @@ parse(Data, ParseState) ->
         rabbit_mqtt_packet:parse(Data, ParseState)
     catch
         _:Reason:Stacktrace ->
-            ?LOG_ERROR("Web MQTT cannot parse a packet, reason: ~tp, stacktrace: ~tp, "
+            ?LOG_DEBUG("Web MQTT cannot parse a packet, reason: ~tp, stacktrace: ~tp, "
                        "payload (first 100 bytes): ~tp",
                        [Reason, Stacktrace, rabbit_mqtt_util:truncate_binary(Data, 100)]),
             {error, cannot_parse}