milvus: [Bug]: Attempting to release an unloaded partition causes the collection can't release any more

Is there an existing issue for this?

• I have searched the existing issues

Environment

- Milvus version: 2.2.5
- Deployment mode(standalone or cluster): standalone
- MQ type(rocksmq, pulsar or kafka):  default
- SDK version(e.g. pymilvus v2.0.0rc2): pymilvus 2.2.4
- OS(Ubuntu or CentOS): CentOS
- CPU/Memory: 2 CPU, 4G Memory
- GPU: None
- Others:

Current Behavior

When I try to release an unloaded partition using python code, the program is blocked. I cannot release the collection any more unless I restart Milvus.

Expected Behavior

The program could throw an exception when I try to release an unloaded partition and don’t cause the collection in a bad state.

Steps To Reproduce

1. Install and Run Milvus Standalone with Docker Compose using following command:
$ wget https://github.com/milvus-io/milvus/releases/download/v2.2.5/milvus-standalone-docker-compose.yml -O docker-compose.yml

sudo docker-compose up -d

2. I can see Milvus server is up. Then try to run following python code:
from pymilvus import CollectionSchema, FieldSchema, DataType, connections

connections.connect(
  alias="default", 
  host='localhost', 
  port='19530'
)


book_id = FieldSchema(
  name="book_id", 
  dtype=DataType.INT64, 
  is_primary=True, 
)
book_name = FieldSchema(
  name="book_name", 
  dtype=DataType.VARCHAR, 
  max_length=200,
)
word_count = FieldSchema(
  name="word_count", 
  dtype=DataType.INT64,  
)
book_intro = FieldSchema(
  name="book_intro", 
  dtype=DataType.FLOAT_VECTOR, 
  dim=2
)
schema = CollectionSchema(
  fields=[book_id, book_name, word_count, book_intro], 
  description="Test book search"
)
collection_name = "book"

from pymilvus import Collection
collection = Collection(
    name=collection_name, 
    schema=schema, 
    using='default', 
    shards_num=2
    )

index_params = {
  "metric_type":"L2",
  "index_type":"IVF_FLAT",
  "params":{"nlist":1024}
}

collection.create_index(
  field_name="book_intro", 
  index_params=index_params
)

partition = collection.create_partition("p2")
collection.release()
collection.load(["_default"])
collection.partition("p2").release()

3. The program is blocked. I can't release the book colleciton any more unless I restart Milvus.

Milvus Log

No response

Anything else?

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