Created question in FIWARE Q/A platform on 16-07-2019 at 12:07
Please, ANSWER this question AT https://stackoverflow.com/questions/57055166/fiware-orion-error-couldnt-connect-to-server-forwarding-query-to-providing

Question:
FIWARE Orion error 'Couldn't connect to server' forwarding 'Query' to providing application

Description:
I am trying to provision a device and send actuation commands back using 2 components Orion and LoRaWAN IoT Agent.

I am running Orion and other components on docker-compose file, and the IoT Agent using node bin/iotagent-lora

I have successfully provisioned the device using :

curl -iX POST \
'http://localhost:4061/iot/devices' \
-H 'Content-Type: application/json' \
-H 'fiware-service: agriculture' \
-H 'fiware-servicepath: /irrigation' \
-d '{
"devices": [
{
"device_id": "pycom1",
"entity_name": "urn:ngsi-ld:tempHumid:001",
"entity_type": "tempHumid",
"transport": "MQTT",

"attributes": [

],
"commands": [

,

],
"internal_attributes": {
"lorawan": {
"application_server":

,
"dev_eui": "0097da62c6b67443",
"app_eui": "70B3D57ED000985F",
"application_id": "1",
"application_key": "2b043fb00af7c6ac4075a35b8a18fc9c",
"data_model":"application_server"
}}}]}'

an automatic registrations is created in Orion after provisioning the device:

{
"id": "5d2d9f4f795d881c2355ab7c",
"expires": "2020-07-16T09:56:31.00Z",
"dataProvided": {
"entities": [

],
"attrs": ["on", "off"]
},
"provider": {
"http":

,
"supportedForwardingMode": "all",
"legacyForwarding": true
},
"status": "active"
}

Following this tutorial I have created another registration for actuation commands like the following:

curl -iX POST \
'http://localhost:1026/v2/registrations' \
-H 'Content-Type: application/json' \
-H 'fiware-service: agriculture' \
-H 'fiware-servicepath: /irrigation' \
-d '{
"description": "Pump Commands",
"dataProvided": {
"entities": [

],
"attrs": [ "on", "off" ]
},
"provider": {
"http":

,
"legacyForwarding": true
}
}'

I have tried to use the proposed solution to an issue similar to the one I am facing, and after trying, I have obtained this error:

while Orion reported

fiware-orion Starting transaction to http://localhost:4061//updateContext

I don't know if it is linked to this issue but a similar bug was already reported in here

fiware-orion | INFO@10:16:34 logMsg.h[1844]: Starting transaction to http://localhost:4061//updateContext
fiware-orion | INFO@10:16:34 httpRequestSend.cpp[592]: Sending message 4 to HTTP server: sending message of 447 bytes to HTTP server
fiware-orion | ERROR@10:16:34 postUpdateContext.cpp[190]: Runtime Error (error 'Couldn't connect to server' forwarding 'Update' to providing application)
fiware-orion | INFO@10:16:34 logMsg.h[1874]: Transaction ended

Thank you in advance