class java.util.ArrayList cannot be cast to class java.util.Map (java.util.ArrayList and java.util.Map are in module java.base of loader 'bootstrap'

[pauloo23]

I am trying to making this HTTP Get request: curl -G -X GET 'http://localhost:8080/temporal/entities/' \ -H 'NGSILD-Tenant: openiot' \ -H 'Link: <https://schema.lab.fiware.org/ld/context>; rel="http://www.w3.org/ns/json-ld#context"; type="application/ld+json"' \ -d 'type=AirQualityObserved' \ -d 'attrs=CO' \ -d 'timeproperty=modifiedAt' \ -d 'timerel=before' \ -d 'timeAt=2022-03-15T11:00:00' \ This is my response: { "type": "https://uri.etsi.org/ngsi-ld/errors/InternalError", "title": "Unexpected error.", "status": 500, "detail": "class java.util.ArrayList cannot be cast to class java.util.Map (java.util.ArrayList and java.util.Map are in module java.base of loader 'bootstrap')" } Versions: --> Orion-LD: latest --> Mintaka: Lastest --> TimescaleDB: timescale/timescaledb-postgis:latest-pg13 --> MongoDB: 4.4 Can please someone help me? Thanks

[wistefan]

Hi @pauloo23 , would be happy to help. Can you send me information on how the AirQualityObserved object looks like?

[pauloo23]

Hi @pauloo23 , would be happy to help. Can you send me information on how the AirQualityObserved object looks like?

{ "id": "urn:ngsi-ld:AirQualityObserved:Porto-AmbientObserved-28079004-2016-03-18T17:00:00", "type": "AirQualityObserved", "CO": { "type": "Property", "value": 500, "unitCode": "GP" }, "CO_Level": { "type": "Property", "value": "moderate" }, "NO": { "type": "Property", "value": 45, "unitCode": "GQ" }, "NO2": { "type": "Property", "value": 69, "unitCode": "GQ" }, "NOx": { "type": "Property", "value": 139, "unitCode": "GQ" }, "SO2": { "type": "Property", "value": 11, "unitCode": "GQ" }, "address": { "type": "Property", "value": { "addressCountry": "ES", "addressLocality": "Madrid", "streetAddress": "Plaza de Espa\u00f1a", "type": "PostalAddress" } }, "airQualityIndex": { "type": "Property", "value": 65 }, "airQualityLevel": { "type": "Property", "value": "moderate" }, "areaServed": { "type": "Property", "value": "Brooklands" }, "dateObserved": { "type": "Property", "value": "2016-03-15T11:00:00/2016-03-15T12:00:00" }, "location": { "type": "GeoProperty", "value": { "type": "Point", "coordinates": [ -3.712247222222222, 40.423852777777775 ] } }, "precipitation": { "type": "Property", "value": 0 }, "refPointOfInterest": { "type": "Relationship", "object": "urn:ngsi-ld:PointOfInterest:28079004-Pza.deEspanya" }, "relativeHumidity": { "type": "Property", "value": 0.54 }, "reliability": { "type": "Property", "value": 0.7 }, "source": { "type": "Property", "value": "http://datos.madrid.es" }, "temperature": { "type": "Property", "value": 12.2 }, "typeOfLocation": { "type": "Property", "value": "outdoor" }, "windDirection": { "type": "Property", "value": 186 }, "windSpeed": { "type": "Property", "value": 0.64 }, "@context": [ "https://uri.etsi.org/ngsi-ld/v1/ngsi-ld-core-context.jsonld", "https://raw.githubusercontent.com/smart-data-models/dataModel.Environment/master/context.jsonld" ] }

[wistefan]

Hi @pauloo23,

it is due to a bug in the handling of list-contexts. Will be fixed as soon as #83 is merged. 2 things to notice:

• the context https://schema.lab.fiware.org/ld/context.jsonld will slow down mintaka(and if used with orion, too) unneccessary, since it includes the core context. The core-context is always present in any NGSI-LD implementation, thus does not need to be provided. Using only "https://fiware.github.io/data-models/context.jsonld" as a context in the link-header will get the same results, but with less latency.
• usage of the tag "latest" should only be done very carefully and ONLY in development environments. Never use volatile tags in production. For future PRs, it would be better to include the real version(f.e. 0.4.3), since "latest" can (and most probably will) be different at any point in time, thus make reproduction much harder.