[Bug]: <MilvusException: (code=1100, message=only IP is the supported metric type for sparse index: invalid parameter[expected=valid index params][actual=invalid index params])>

[369699269]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

参考这篇文档的 collection构建方法，https://milvus.io/docs/zh/multi-vector-search.md

python 版本 3.11，pymilvus版本 2.5.5，milvus 服务端版本 v2.4.10

下面是我的code:

def create_collection():
milvus_client = MilvusClient(
uri=settings.AIOPS_MILVUS_DB_URL,
user=settings.AIOPS_MILVUS_DB_USER,
password=settings.AIOPS_MILVUS_DB_PASSWORD,
db_name=settings.AIOPS_MILVUS_DB_NAME
)
collection_name = "aiops_hybrid"
has_collection = milvus_client.has_collection(collection_name, timeout=5)
if has_collection:
print("⚠️ An existing collection was found and is being deleted...")
milvus_client.drop_collection(collection_name)
print("✅ Old collection deleted!")

# create schema
schema = milvus_client.create_schema()
schema.add_field("pk", DataType.INT64, is_primary=True, auto_id=True)
schema.add_field("text", DataType.VARCHAR, max_length=65535, enable_analyzer=True)
schema.add_field("dense_vector", DataType.FLOAT_VECTOR, dim=1536)
schema.add_field("sparse_vector", DataType.SPARSE_FLOAT_VECTOR)
schema.add_field("id", DataType.VARCHAR, max_length=512)
schema.add_field("title", DataType.VARCHAR, max_length=512)
schema.add_field("url", DataType.VARCHAR, max_length=512)
schema.add_field("chunk_index", DataType.INT64)

bm25_function = Function(
    name="bm25_fn",
    input_field_names=["text"],
    output_field_names=["sparse_vector"],
    function_type=FunctionType.BM25,
)
schema.add_function(bm25_function)
# create index
index_params = milvus_client.prepare_index_params()
index_params.add_index(
    field_name="dense_vector",
    index_name="dense_index",
    index_type="IVF_FLAT",
    metric_type="IP",
    params={"nlist": 128},
)
index_params.add_index(
    field_name="sparse_vector",
    index_name="sparse_index",
    index_type="SPARSE_INVERTED_INDEX",
    metric_type="BM25",
    params={"bm25_k1": 1.2, "bm25_b": 0.75},
)
milvus_client.create_collection(collection_name, schema=schema, index_params=index_params,
                                consistency_level="Strong")
print(f"create collection successfully!")

执行这个方法的时候报错

2025-04-09 12:27:52,312 [ERROR][handler]: RPC error: [create_index], <MilvusException: (code=1100, message=only IP is the supported metric type for sparse index: invalid parameter[expected=valid index params][actual=invalid index params])>, <Time:{'RPC start': '2025-04-09 12:27:51.960388', 'RPC error': '2025-04-09 12:27:52.312790'}> (decorators.py:140)
2025-04-09 12:27:52,313 [ERROR][_create_index]: Failed to create an index on collection: aiops_hybrid (milvus_client.py:183)
Traceback (most recent call last):
File "C:\Code\aiops\insert_milvus_multi.py", line 123, in
create_collection()
File "C:\Code\aiops\insert_milvus_multi.py", line 60, in create_collection
milvus_client.create_collection(collection_name, schema=schema, index_params=index_params,
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\milvus_client\milvus_client.py", line 99, in create_collection
return self._create_collection_with_schema(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\milvus_client\milvus_client.py", line 899, in _create_collection_with_schema
self.create_index(collection_name, index_params, timeout=timeout)
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\milvus_client\milvus_client.py", line 162, in create_index
self._create_index(collection_name, index_param, timeout=timeout, **kwargs)
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\milvus_client\milvus_client.py", line 184, in _create_index
raise ex from ex
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\milvus_client\milvus_client.py", line 173, in _create_index
conn.create_index(
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\decorators.py", line 141, in handler
raise e from e
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\decorators.py", line 137, in handler
return func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\decorators.py", line 176, in handler
return func(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\decorators.py", line 116, in handler
raise e from e
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\decorators.py", line 86, in handler
return func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\client\grpc_handler.py", line 1083, in create_index
check_status(status)
File "C:\Code\aiops.venv\Lib\site-packages\pymilvus\client\utils.py", line 64, in check_status
raise MilvusException(status.code, status.reason, status.error_code)
pymilvus.exceptions.MilvusException: <MilvusException: (code=1100, message=only IP is the supported metric type for sparse index: invalid parameter[expected=valid index params][actual=invalid index params])>

Expected Behavior

No response

Steps/Code To Reproduce behavior

Environment details

- Hardware/Softward conditions (OS, CPU, GPU, Memory):
- Method of installation (Docker, or from source):
- Milvus version (v0.3.1, or v0.4.0):
- Milvus configuration (Settings you made in `server_config.yaml`):

Anything else?

No response

[XuanYang-cn]

This is a bug reported from Milvus, I'm looking into it

[XuanYang-cn]

@369699269 FullText search in introduced at Milvus 2.5.0, Please upgrade your Milvus to the latest 2.5.x and try again.