VocabularyProperty not working as expected

[jason-fox]

ORION_LD 1.6.0-pre-1570

Create an Entity with a VocabularyProperty

url -s -X POST \
  'http://localhost:1026/ngsi-ld/v1/entities/' \
  -H 'Content-Type: application/ld+json' \
  -d '{
    "id": "urn:ngsi-ld:Building:store001",
    "type": "Building",
    "category": {"type": "VocabularyProperty", "vocab": "commercial"},
    "address": {
      "type": "Property", 
      "value": {"streetAddress": "Bornholmer Straße 65", "addressRegion": "Berlin", "addressLocality": "Prenzlauer Berg", "postalCode": "10439"},
      "verified": {"type": "Property", "value": true}
    },
    "location": {"type": "GeoProperty", "value": {"type": "Point", "coordinates": [13.3986, 52.5547]}
    },
    "name": {"type": "Property", "value": "Bösebrücke Einkauf"},
    "furniture": {
        "type": "Relationship",
        "object": [
          "urn:ngsi-ld:Shelf:unit001",
          "urn:ngsi-ld:Shelf:unit002",
          "urn:ngsi-ld:Shelf:unit003"
        ]
    },
    "@context": "http://context/ngsi-context.jsonld"
}'

1. If I insert the vocab as an array of one item, it is returned as an array and not reduced.

"category": {"type": "VocabularyProperty", "vocab": ["commercial"]},

2. Requesting as keyValues (also test options=simplified, format=simplified)

curl -L 'http://localhost:1026/ngsi-ld/v1/entities/urn:ngsi-ld:Building:store001/?options=keyValues'

Returns the category in Normalized format.

"category": {
        "type": "VocabularyProperty",
        "vocab": "commercial"
    },

3. Requesting as concise (also test options=concisr, format=concise)

curl -L http://localhost:1026/ngsi-ld/v1/entities/urn:ngsi-ld:Building:store001/?options=concise

Causes the broker to crash.

4. Insertion using an alternate context.

curl -L 'http://localhost:1026/ngsi-ld/v1/entities/' \
-H 'Content-Type: application/ld+json' \
--data-raw '{
    "id": "urn:ngsi-ld:Building:store005",
    "type": "ビル",
    "カテゴリー": {
    	"type": "VocabularyProperty",
        "vocab": "コマーシャル"
    },
    "住所": {
        "type": "Property",
        "value": {
            "streetAddress": "Eisenacher Straße 98",
            "addressRegion": "Berlin",
            "addressLocality": "Marzahn",
            "postalCode": "12685"
        }
    },
    "場所": {
        "type": "GeoProperty",
        "value": {
             "type": "Point",
             "coordinates": [13.5646, 52.5435]
        }
    },
    "名前": {
        "type": "Property",
        "value": "Yuusui-en"
    },
    "@context":"http://context/japanese-user-context.jsonld"
}'

Inserts successfully, but retrieval using another context.

curl -L 'http://localhost:1026/ngsi-ld/v1/entities/urn:ngsi-ld:Building:store005' \
-H 'Content-Type: application/json' \
-H 'Link: <http://context/user-context.jsonld>; rel="http://www.w3.org/ns/json-ld#context"; type="application/ld+json"'

causes the broker to crash.

All the @context files can be found here: https://github.com/FIWARE/tutorials.Working-with-Linked-Data/tree/feature/vocab/data-models

[jason-fox]

Further investigation. No crash occurs when running with

 -dbhost mongo-db -logLevel DEBUG -experimental 

However, the broker exits If I use:

 -dbhost mongo-db -logLevel DEBUG -experimental  -forwarding