diff --git a/api/apps/mcp_server_app.py b/api/apps/mcp_server_app.py
index 863aac963..2c656df18 100644
--- a/api/apps/mcp_server_app.py
+++ b/api/apps/mcp_server_app.py
@@ -13,6 +13,8 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
+import asyncio
+
 from quart import Response, request
 from api.apps import current_user, login_required
 
@@ -106,7 +108,7 @@ async def create() -> Response:
             return get_data_error_result(message="Tenant not found.")
 
         mcp_server = MCPServer(id=server_name, name=server_name, url=url, server_type=server_type, variables=variables, headers=headers)
-        server_tools, err_message = get_mcp_tools([mcp_server], timeout)
+        server_tools, err_message = await asyncio.to_thread(get_mcp_tools, [mcp_server], timeout)
         if err_message:
             return get_data_error_result(err_message)
 
@@ -158,7 +160,7 @@ async def update() -> Response:
         req["id"] = mcp_id
 
         mcp_server = MCPServer(id=server_name, name=server_name, url=url, server_type=server_type, variables=variables, headers=headers)
-        server_tools, err_message = get_mcp_tools([mcp_server], timeout)
+        server_tools, err_message = await asyncio.to_thread(get_mcp_tools, [mcp_server], timeout)
         if err_message:
             return get_data_error_result(err_message)
 
@@ -242,7 +244,7 @@ async def import_multiple() -> Response:
             headers = {"authorization_token": config["authorization_token"]} if "authorization_token" in config else {}
             variables = {k: v for k, v in config.items() if k not in {"type", "url", "headers"}}
             mcp_server = MCPServer(id=new_name, name=new_name, url=config["url"], server_type=config["type"], variables=variables, headers=headers)
-            server_tools, err_message = get_mcp_tools([mcp_server], timeout)
+            server_tools, err_message = await asyncio.to_thread(get_mcp_tools, [mcp_server], timeout)
             if err_message:
                 results.append({"server": base_name, "success": False, "message": err_message})
                 continue
@@ -322,7 +324,7 @@ async def list_tools() -> Response:
                 tool_call_sessions.append(tool_call_session)
 
                 try:
-                    tools = tool_call_session.get_tools(timeout)
+                    tools = await asyncio.to_thread(tool_call_session.get_tools, timeout)
                 except Exception as e:
                     tools = []
                     return get_data_error_result(message=f"MCP list tools error: {e}")
@@ -340,7 +342,7 @@ async def list_tools() -> Response:
         return server_error_response(e)
     finally:
         # PERF: blocking call to close sessions — consider moving to background thread or task queue
-        close_multiple_mcp_toolcall_sessions(tool_call_sessions)
+        await asyncio.to_thread(close_multiple_mcp_toolcall_sessions, tool_call_sessions)
 
 
 @manager.route("/test_tool", methods=["POST"])  # noqa: F821
@@ -367,10 +369,10 @@ async def test_tool() -> Response:
 
         tool_call_session = MCPToolCallSession(mcp_server, mcp_server.variables)
         tool_call_sessions.append(tool_call_session)
-        result = tool_call_session.tool_call(tool_name, arguments, timeout)
+        result = await asyncio.to_thread(tool_call_session.tool_call, tool_name, arguments, timeout)
 
         # PERF: blocking call to close sessions — consider moving to background thread or task queue
-        close_multiple_mcp_toolcall_sessions(tool_call_sessions)
+        await asyncio.to_thread(close_multiple_mcp_toolcall_sessions, tool_call_sessions)
         return get_json_result(data=result)
     except Exception as e:
         return server_error_response(e)
@@ -424,13 +426,13 @@ async def test_mcp() -> Response:
         tool_call_session = MCPToolCallSession(mcp_server, mcp_server.variables)
 
         try:
-            tools = tool_call_session.get_tools(timeout)
+            tools = await asyncio.to_thread(tool_call_session.get_tools, timeout)
         except Exception as e:
             tools = []
             return get_data_error_result(message=f"Test MCP error: {e}")
         finally:
             # PERF: blocking call to close sessions — consider moving to background thread or task queue
-            close_multiple_mcp_toolcall_sessions([tool_call_session])
+            await asyncio.to_thread(close_multiple_mcp_toolcall_sessions, [tool_call_session])
 
         for tool in tools:
             tool_dict = tool.model_dump()
diff --git a/api/utils/api_utils.py b/api/utils/api_utils.py
index abc69973b..afb4ff772 100644
--- a/api/utils/api_utils.py
+++ b/api/utils/api_utils.py
@@ -163,6 +163,7 @@ def validate_request(*args, **kwargs):
             if error_arguments:
                 error_string += "required argument values: {}".format(",".join(["{}={}".format(a[0], a[1]) for a in error_arguments]))
             return error_string
+        return None
 
     def wrapper(func):
         @wraps(func)
@@ -409,7 +410,7 @@ def get_parser_config(chunk_method, parser_config):
     if default_config is None:
         return deep_merge(base_defaults, parser_config)
 
-    # Ensure raptor and graphrag fields have default values if not provided
+    # Ensure raptor and graph_rag fields have default values if not provided
     merged_config = deep_merge(base_defaults, default_config)
     merged_config = deep_merge(merged_config, parser_config)
 
diff --git a/common/data_source/confluence_connector.py b/common/data_source/confluence_connector.py
index 643bf8e36..d2494c3de 100644
--- a/common/data_source/confluence_connector.py
+++ b/common/data_source/confluence_connector.py
@@ -186,7 +186,7 @@ class OnyxConfluence:
         # between the db and redis everywhere the credentials might be updated
         new_credential_str = json.dumps(new_credentials)
         self.redis_client.set(
-            self.credential_key, new_credential_str, nx=True, ex=self.CREDENTIAL_TTL
+            self.credential_key, new_credential_str, exp=self.CREDENTIAL_TTL
         )
         self._credentials_provider.set_credentials(new_credentials)
 
@@ -1599,8 +1599,8 @@ class ConfluenceConnector(
                 semantic_identifier=semantic_identifier,
                 extension=".html",  # Confluence pages are HTML
                 blob=page_content.encode("utf-8"),  # Encode page content as bytes
-                size_bytes=len(page_content.encode("utf-8")),  # Calculate size in bytes
                 doc_updated_at=datetime_from_string(page["version"]["when"]),
+                size_bytes=len(page_content.encode("utf-8")),  # Calculate size in bytes
                 primary_owners=primary_owners if primary_owners else None,
                 metadata=metadata if metadata else None,
             )
diff --git a/common/data_source/models.py b/common/data_source/models.py
index a5ca05859..ad825eafa 100644
--- a/common/data_source/models.py
+++ b/common/data_source/models.py
@@ -94,6 +94,7 @@ class Document(BaseModel):
     blob: bytes
     doc_updated_at: datetime
     size_bytes: int
+    primary_owners: list
     metadata: Optional[dict[str, Any]] = None
 
 
diff --git a/common/data_source/slack_connector.py b/common/data_source/slack_connector.py
index b6aa80bdd..5fabc3d00 100644
--- a/common/data_source/slack_connector.py
+++ b/common/data_source/slack_connector.py
@@ -167,7 +167,6 @@ def get_latest_message_time(thread: ThreadType) -> datetime:
 
 
 def _build_doc_id(channel_id: str, thread_ts: str) -> str:
-    """构建文档ID"""
     return f"{channel_id}__{thread_ts}"
 
 
@@ -179,7 +178,6 @@ def thread_to_doc(
     user_cache: dict[str, BasicExpertInfo | None],
     channel_access: Any | None,
 ) -> Document:
-    """将线程转换为文档"""
     channel_id = channel["id"]
 
     initial_sender_expert_info = expert_info_from_slack_id(
@@ -237,7 +235,6 @@ def filter_channels(
     channels_to_connect: list[str] | None,
     regex_enabled: bool,
 ) -> list[ChannelType]:
-    """过滤频道"""
     if not channels_to_connect:
         return all_channels
 
@@ -381,7 +378,6 @@ def _process_message(
         [MessageType], SlackMessageFilterReason | None
     ] = default_msg_filter,
 ) -> ProcessedSlackMessage:
-    """处理消息"""
     thread_ts = message.get("thread_ts")
     thread_or_message_ts = thread_ts or message["ts"]
     try:
@@ -536,7 +532,6 @@ class SlackConnector(
         end: SecondsSinceUnixEpoch | None = None,
         callback: Any = None,
     ) -> GenerateSlimDocumentOutput:
-        """获取所有简化文档（带权限同步）"""
         if self.client is None:
             raise ConnectorMissingCredentialError("Slack")
 
diff --git a/common/http_client.py b/common/http_client.py
index 2bdfca91e..cfd0687a7 100644
--- a/common/http_client.py
+++ b/common/http_client.py
@@ -16,7 +16,7 @@ import logging
 import os
 import time
 from typing import Any, Dict, Optional
-from urllib.parse import parse_qsl, urlencode, urlparse, urlunparse
+from urllib.parse import urlparse, urlunparse
 
 from common import settings
 import httpx
@@ -58,21 +58,34 @@ def _get_delay(backoff_factor: float, attempt: int) -> float:
 _SENSITIVE_QUERY_KEYS = {"client_secret", "secret", "code", "access_token", "refresh_token", "password", "token", "app_secret"}
 
 def _redact_sensitive_url_params(url: str) -> str:
+    """
+    Return a version of the URL that is safe to log.
+
+    We intentionally drop query parameters and userinfo to avoid leaking
+    credentials or tokens via logs. Only scheme, host, port and path
+    are preserved.
+    """
     try:
         parsed = urlparse(url)
-        if not parsed.query:
-            return url
-        clean_query = []
-        for k, v in parse_qsl(parsed.query, keep_blank_values=True):
-            if k.lower() in _SENSITIVE_QUERY_KEYS:
-                clean_query.append((k, "***REDACTED***"))
-            else:
-                clean_query.append((k, v))
-        new_query = urlencode(clean_query, doseq=True)
-        redacted_url = urlunparse(parsed._replace(query=new_query))
-        return redacted_url
+        # Remove any potential userinfo (username:password@)
+        netloc = parsed.hostname or ""
+        if parsed.port:
+            netloc = f"{netloc}:{parsed.port}"
+        # Reconstruct URL without query, params, fragment, or userinfo.
+        safe_url = urlunparse(
+            (
+                parsed.scheme,
+                netloc,
+                parsed.path,
+                "",  # params
+                "",  # query
+                "",  # fragment
+            )
+        )
+        return safe_url
     except Exception:
-        return url
+        # If parsing fails, fall back to omitting the URL entirely.
+        return "<redacted-url>"
 
 def _is_sensitive_url(url: str) -> bool:
     """Return True if URL is one of the configured OAuth endpoints."""
@@ -151,9 +164,15 @@ async def async_request(
             except httpx.RequestError as exc:
                 last_exc = exc
                 if attempt >= retries:
-                    # Do not log the full URL here to avoid leaking sensitive data.
+                    if not _is_sensitive_url(url):
+                        log_url = _redact_sensitive_url_params(url)
+                        logger.warning(f"async_request exhausted retries for {method}")
+                    raise
+                delay = _get_delay(backoff_factor, attempt)
+                if not _is_sensitive_url(url):
+                    log_url = _redact_sensitive_url_params(url)
                     logger.warning(
-                        f"async_request exhausted retries for {method}; last error: {exc}"
+                        f"async_request attempt {attempt + 1}/{retries + 1} failed for {method}; retrying in {delay:.2f}s"
                     )
                     raise
                 delay = _get_delay(backoff_factor, attempt)
diff --git a/deepdoc/parser/ppt_parser.py b/deepdoc/parser/ppt_parser.py
index 39eab03a6..1b04b4d7c 100644
--- a/deepdoc/parser/ppt_parser.py
+++ b/deepdoc/parser/ppt_parser.py
@@ -88,12 +88,9 @@ class RAGFlowPptParser:
             texts = []
             for shape in sorted(
                     slide.shapes, key=lambda x: ((x.top if x.top is not None else 0) // 10, x.left if x.left is not None else 0)):
-                try:
-                    txt = self.__extract(shape)
-                    if txt:
-                        texts.append(txt)
-                except Exception as e:
-                    logging.exception(e)
+                txt = self.__extract(shape)
+                if txt:
+                    texts.append(txt)
             txts.append("\n".join(texts))
 
         return txts
diff --git a/rag/utils/opendal_conn.py b/rag/utils/opendal_conn.py
index c261665f7..b188346c7 100644
--- a/rag/utils/opendal_conn.py
+++ b/rag/utils/opendal_conn.py
@@ -45,9 +45,16 @@ def get_opendal_config():
         # Only include non-sensitive keys in logs. Do NOT
         # add 'password' or any key containing embedded credentials
         # (like 'connection_string').
-        SAFE_LOG_KEYS = ['scheme', 'host', 'port', 'database', 'table'] # explicitly non-sensitive
-        loggable_kwargs = {k: v for k, v in kwargs.items() if k in SAFE_LOG_KEYS}
-        logging.info("Loaded OpenDAL configuration (non sensitive fields only): %s", loggable_kwargs)
+        safe_log_info = {
+            "scheme": kwargs.get("scheme"),
+            "host": kwargs.get("host"),
+            "port": kwargs.get("port"),
+            "database": kwargs.get("database"),
+            "table": kwargs.get("table"),
+            # indicate presence of credentials without logging them
+            "has_credentials": any(k in kwargs for k in ("password", "connection_string")),
+        }
+        logging.info("Loaded OpenDAL configuration (non sensitive fields only): %s", safe_log_info)
 
         # For safety, explicitly remove sensitive keys from kwargs after use
         if "password" in kwargs: