Created question in FIWARE Q/A platform on 11-12-2018 at 02:12
Please, ANSWER this question AT https://stackoverflow.com/questions/53715995/client-agent-information-reporting-error-device-group-not-found

Question:
Client - Agent Information Reporting Error: "DEVICE_GROUP_NOT_FOUND"

Description:
It appears that IoT-Agent isn't receiving measures, Agent's log says device group not found [MONGO-ALARM]. Does anyone understand what this error means or how to fix it?
Agent's log:

time=2018-12-10T16:48:24.824Z | lvl=DEBUG | corr=n/a | trans=n/a | op=LWM2MLib.COAPRouter | msg=Handling request with method [POST] on url [/rd/1] with messageId [24748]
time=2018-12-10T16:48:24.826Z | lvl=DEBUG | corr=n/a | trans=n/a | op=LWM2MLib.UpdateRegistration | msg=Handling update registration request
time=2018-12-10T16:48:24.826Z | lvl=DEBUG | corr=n/a | trans=n/a | op=LWM2MLib.COAPUtils | msg=Extracting query parameters from request
time=2018-12-10T16:48:24.827Z | lvl=DEBUG | corr=n/a | trans=n/a | op=LWM2MLib.UpdateRegistration | msg=Updating device register with lifetime [undefined] and address [193.136.33.222].

time=2018-12-10T16:48:24.829Z | lvl=DEBUG | corr=54b6621d-65fd-43db-ac9b-fade34e4d947 | trans=54b6621d-65fd-43db-ac9b-fade34e4d947 | op=IoTAgentNGSI.MongoDBGroupRegister | srv=n/a | subsrv=n/a | msg=Looking for group params ["resource","apikey"] with queryObj {} | comp=IoTAgent
time=2018-12-10T16:48:24.835Z | lvl=DEBUG | corr=54b6621d-65fd-43db-ac9b-fade34e4d947 | trans=54b6621d-65fd-43db-ac9b-fade34e4d947 | op=IoTAgentNGSI.MongoDBGroupRegister | srv=n/a | subsrv=n/a | msg=Device group for fields [["resource","apikey"]] not found: [{}] | comp=IoTAgent
**time=2018-12-10T16:48:24.836Z | lvl=ERROR | corr=54b6621d-65fd-43db-ac9b-fade34e4d947 | trans=54b6621d-65fd-43db-ac9b-fade34e4d947 | op=IoTAgentNGSI.Alarms | srv=n/a | subsrv=n/a | msg=Raising [MONGO-ALARM]:

| comp=IoTAgent**
time=2018-12-10T16:48:24.836Z | lvl=DEBUG | corr=54b6621d-65fd-43db-ac9b-fade34e4d947 | trans=54b6621d-65fd-43db-ac9b-fade34e4d947 | op=IoTAgentNGSI.MongoDBDeviceRegister | srv=n/a | subsrv=n/a | msg=Looking for device with id [raspiSensorTV]. | comp=IoTAgent
time=2018-12-10T16:48:24.843Z | lvl=ERROR | corr=54b6621d-65fd-43db-ac9b-fade34e4d947 | trans=54b6621d-65fd-43db-ac9b-fade34e4d947 | op=IoTAgentNGSI.Alarms | srv=n/a | subsrv=n/a | msg=Releasing [MONGO-ALARM] | comp=IoTAgent

time=2018-12-10T16:48:24.844Z | lvl=DEBUG | corr=n/a | trans=n/a | op=LWM2MLib.UpdateRegistration | msg=Update registration request ended successfully

The log above appears everytime the device signals to have sent a measure, but my query for provisioned devices returns empty list:

curl -X GET \
'http://localhost:4041/iot/devices' \
-H 'fiware-service: smartGondor' \
-H 'fiware-servicepath: /gardens'

Any idea please?