Collection duplication error after container restart

[hellsontime]

I took clean docker compose from official documentation

https://milvus.io/docs/install_standalone-docker-compose.md

up the containers and trying to perfoem request it via curl

I'm sending this request:

url -X POST http://standalone:19530/v2/vectordb/collections/create \                                                                                                                     
  -H "Authorization: Bearer root:Milvus" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{                    
    "dbName": "default",
    "collectionName": "phant",
    "dimension": 1536,
    "metricType": "COSINE",
    "primaryField": "id",
    "vectorField": "embedding"
}'

and got success:

{"code":0,"data":{}}

when I'm sending the same request again, it understand that this collection with same params already exist and just return success again:

{"code":0,"data":{}}

this is fine

then what i did:

i restarted milvus container

docker compose down standalone
docker compose up standalone -d

and trying to send exactly the same request:

url -X POST http://standalone:19530/v2/vectordb/collections/create \                                                                                                                     
  -H "Authorization: Bearer root:Milvus" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{                    
    "dbName": "default",
    "collectionName": "phant",
    "dimension": 1536,
    "metricType": "COSINE",
    "primaryField": "id",
    "vectorField": "embedding"
}'

but nowI'm getting this error:

{"code":65535,"message":"create duplicate collection with different parameters, collection: phant"}

I cant get why this happening, the parameter are the same I just restarted the container.

Sorry if this is stupid question, and I'm not getting some basic concepts, but I spent a lot of time trying to figure out this behavior with no success

[hellsontime]

Might be somehow related to #40147

[yhmo]

Which version of your milvus, I could not reproduce it in versions v2.4.20/v2.5.1/v2.5.5
Use this script to test:

for i in {1..10}
do
	curl --request POST \
	--url "http://127.0.0.1:19530/v2/vectordb/collections/create" \
	--header "Authorization: Bearer root:Milvus" \
	--header "Content-Type: application/json" \
	-d '{                    
	    "dbName": "default",
	    "collectionName": "phant",
	    "dimension": 1536,
	    "metricType": "COSINE",
	    "primaryField": "id",
	    "vectorField": "embedding"
	}'
	echo
done

[hellsontime]

@yhmo All the versions are form this file https://github.com/milvus-io/milvus/releases/download/v2.5.6/milvus-standalone-docker-compose.yml, I basically took this docker compose, added .env and run it.

The version is milvusdb/milvus:v2.5.6

Also to reproduce it, after you did a bunch of requests that are retuning {"code":0,"data":{}}:

• restart the container with docker compose down standalone && docker compose up standalone -d
• do the same requests again

[yhmo]

You are right, the error is returned after the milvus is restarted. I have created an issue: #40955 to trace.