pymilvus.exceptions.MilvusException: ＜MilvusException: (code=0, message=attempt #0: channel=by-dev-r

Langchain 连接AI大模型连接milvus数据库，向milvus同步数据时报错如下：

ERROR:    Exception in ASGI application
Traceback (most recent call last):
  File "/home/devops/.local/lib/python3.10/site-packages/uvicorn/protocols/http/httptools_impl.py", line 411, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
  File "/home/devops/.local/lib/python3.10/site-packages/uvicorn/middleware/proxy_headers.py", line 69, in __call__
    return await self.app(scope, receive, send)
  File "/home/devops/.local/lib/python3.10/site-packages/fastapi/applications.py", line 1054, in __call__
    await super().__call__(scope, receive, send)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/applications.py", line 119, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/middleware/errors.py", line 186, in __call__
    raise exc
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/middleware/errors.py", line 164, in __call__
    await self.app(scope, receive, _send)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/middleware/exceptions.py", line 62, in __call__
    await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/_exception_handler.py", line 64, in wrapped_app
    raise exc
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    await app(scope, receive, sender)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/routing.py", line 762, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/routing.py", line 782, in app
    await route.handle(scope, receive, send)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/routing.py", line 297, in handle
    await self.app(scope, receive, send)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/routing.py", line 77, in app
    await wrap_app_handling_exceptions(app, request)(scope, receive, send)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/_exception_handler.py", line 64, in wrapped_app
    raise exc
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    await app(scope, receive, sender)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/routing.py", line 72, in app
    response = await func(request)
  File "/home/devops/.local/lib/python3.10/site-packages/fastapi/routing.py", line 299, in app
    raise e
  File "/home/devops/.local/lib/python3.10/site-packages/fastapi/routing.py", line 294, in app
    raw_response = await run_endpoint_function(
  File "/home/devops/.local/lib/python3.10/site-packages/fastapi/routing.py", line 193, in run_endpoint_function
    return await run_in_threadpool(dependant.call, **values)
  File "/home/devops/.local/lib/python3.10/site-packages/starlette/concurrency.py", line 40, in run_in_threadpool
    return await anyio.to_thread.run_sync(func, *args)
  File "/home/devops/.local/lib/python3.10/site-packages/anyio/to_thread.py", line 56, in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
  File "/home/devops/.local/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 2144, in run_sync_in_worker_thread
    return await future
  File "/home/devops/.local/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 851, in run
    result = context.run(func, *args)
  File "/home/devops/develop/code/Langchain-Chatchat/server/knowledge_base/kb_doc_api.py", line 172, in upload_docs
    result = update_docs(
  File "/home/devops/develop/code/Langchain-Chatchat/server/knowledge_base/kb_doc_api.py", line 289, in update_docs
    kb.update_doc(kb_file, not_refresh_vs_cache=True)
  File "/home/devops/develop/code/Langchain-Chatchat/server/knowledge_base/kb_service/base.py", line 165, in update_doc
    return self.add_doc(kb_file, docs=docs, **kwargs)
  File "/home/devops/develop/code/Langchain-Chatchat/server/knowledge_base/kb_service/base.py", line 131, in add_doc
    doc_infos = self.do_add_doc(docs, **kwargs)
  File "/home/devops/develop/code/Langchain-Chatchat/server/knowledge_base/kb_service/milvus_kb_service.py", line 84, in do_add_doc
    ids = self.milvus.add_documents(docs)
  File "/home/devops/.local/lib/python3.10/site-packages/langchain_core/vectorstores.py", line 119, in add_documents
    return self.add_texts(texts, metadatas, **kwargs)
  File "/home/devops/.local/lib/python3.10/site-packages/langchain_community/vectorstores/milvus.py", line 599, in add_texts
    self.col.flush()
  File "/home/devops/.local/lib/python3.10/site-packages/pymilvus/orm/collection.py", line 319, in flush
    conn.flush([self.name], timeout=timeout, **kwargs)
  File "/home/devops/.local/lib/python3.10/site-packages/pymilvus/decorators.py", line 148, in handler
    raise e from e
  File "/home/devops/.local/lib/python3.10/site-packages/pymilvus/decorators.py", line 144, in handler
    return func(*args, **kwargs)
  File "/home/devops/.local/lib/python3.10/site-packages/pymilvus/decorators.py", line 183, in handler
    return func(self, *args, **kwargs)
  File "/home/devops/.local/lib/python3.10/site-packages/pymilvus/decorators.py", line 123, in handler
    raise e from e
  File "/home/devops/.local/lib/python3.10/site-packages/pymilvus/decorators.py", line 87, in handler
    return func(*args, **kwargs)
  File "/home/devops/.local/lib/python3.10/site-packages/pymilvus/client/grpc_handler.py", line 1424, in flush
    check_status(response.status)
  File "/home/devops/.local/lib/python3.10/site-packages/pymilvus/client/utils.py", line 63, in check_status
    raise MilvusException(status.code, status.reason, status.error_code)
pymilvus.exceptions.MilvusException: <MilvusException: (code=0, message=attempt #0: channel=by-dev-rootcoord-dml_6_452491713399827224v0: channel not found: attempt #1: 

哪位大神见过这是什么问题，怎么解决