Fix Bug #2224 (#2240)

dbgpt/storage/vector_store/chroma_store.py

@@ -4,6 +4,7 @@ import os
 from typing import Any, Dict, Iterable, List, Mapping, Optional, Union
 
 from chromadb import PersistentClient
+from chromadb.api.client import SharedSystemClient
 from chromadb.config import Settings
 
 from dbgpt._private.pydantic import ConfigDict, Field
@@ -201,6 +202,7 @@ class ChromaStore(VectorStoreBase):
         logger.info(f"chroma vector_name:{vector_name} begin delete...")
         # self.vector_store_client.delete_collection()
         self._chroma_client.delete_collection(self._collection.name)
+        SharedSystemClient.clear_system_cache()
         self._clean_persist_folder()
         return True