Created question in FIWARE Q/A platform on 03-03-2022 at 13:03
Please, ANSWER this question AT https://stackoverflow.com/questions/71338124/multiple-entities-cant-be-saved-at-same-time-in-mongo-historical-database

Question:
Multiple entities can't be saved at same time in Mongo historical database

Description:
I am trying to save multiple data entities in historical database, but only the first one from the array is saved in Mongo historical database.
Below are the steps I performed.
Docker-compose for Cygnus:
version: "3.8"
services:
cygnus:
hostname: cygnus
container_name: cygnus
image: fiware/cygnus-ngsi:2.16.0
networks:

• default_config
  ports:
• "5080:5080"
• "5051:5051"
  expose:
• "5051"
• "5080"
  environment:
• CYGNUS_MONGO_SERVICE_PORT=5051
• CYGNUS_MONGO_HOSTS=mongo_db:27017
• CYGNUS_MONGO_USER=root
• CYGNUS_MONGO_PASS=root
• CYGNUS_MONGO_AUTH_SOURCE=admin
• CYGNUS_MONGO_DATA_MODEL=dm-by-service-path
• CYGNUS_MONGO_ATTR_PERSISTENCE=column
• CYGNUS_SERVICE_PORT=5051
• CYGNUS_API_PORT=5080
• CYGNUS_LOG_LEVEL=DEBUG
• CYGNUS_ORION_HOST=orion
• CYGNUS_ORION_PORT=1026
• CYGNUS_ORION_SSL=true
  networks:
  default_config:
  external: true

Create a Cygnus subscription:
curl --location --request POST 'http://localhost1026/v2/subscriptions' \
--header 'Content-Type: application/json' \
--data-raw '{
"description": "Notify Cygnus Mongo-DB of all context changes",
"subject": {
"entities": [

]
},
"notification": {
"http":

},
"throttling": 5
}'

Batch Create a New Data Entity :
curl --location --request POST 'http://localhost:1026/v2/op/update/' \
--header 'Content-Type: application/json' \
--data-raw '{
"actionType":"append_strict",
"entities":[
{
"id":"urn:ngsi-ld:Product:100", "type":"Product",
"name":

,
"size":

,
"price":

},
{
"id":"urn:ngsi-ld:Product:101", "type":"Product",
"name":

,
"size":

,
"price":

}
]
}'

Result in Mongo:

Group updates also do not work.
Did I miss something in the configuration or there is no possibility for that in Cygnus?
Thank you in advance.