UPD: ExceptionGroup catch in tasks.py

ExceptionGroup catch in tasks.py

Added caching for multiple concurrent exceptions.
Modified:
- async def redis_task_command_listener
- async def cleanup_task

backend/open_webui/tasks.py

@@ -7,6 +7,7 @@ import logging
 from redis.asyncio import Redis
 from fastapi import Request
 from typing import Dict, List, Optional
+from builtins import ExceptionGroup
 
 from open_webui.env import SRC_LOG_LEVELS, REDIS_KEY_PREFIX
 
@@ -32,13 +33,34 @@ async def redis_task_command_listener(app):
     async for message in pubsub.listen():
         if message["type"] != "message":
             continue
+        try:
+            # Check if message data is empty or None
+            if not message["data"]:
+                log.warning("Received empty message data from Redis pub/sub")
+                continue
+
+            # Attempt to parse JSON
             try:
                 command = json.loads(message["data"])
+            except json.JSONDecodeError as json_error:
+                log.warning(f"Invalid JSON in Redis message: {message['data'][:100]}... Error: {json_error}")
+                continue
+
             if command.get("action") == "stop":
                 task_id = command.get("task_id")
                 local_task = tasks.get(task_id)
                 if local_task:
+                    try:
                         local_task.cancel()
+                        # Wait briefly for cancellation to complete
+                        await asyncio.sleep(0.1)
+                    except Exception as cancel_error:
+                        log.error(f"Error cancelling task {task_id}: {cancel_error}")
+        except ExceptionGroup as eg:
+            # Handle multiple concurrent exceptions
+            log.error(f"Multiple errors in task command processing: {len(eg.exceptions)} exceptions")
+            for i, exc in enumerate(eg.exceptions):
+                log.error(f"  Exception {i+1}: {type(exc).__name__}: {exc}")
         except Exception as e:
             log.exception(f"Error handling distributed task command: {e}")
 
@@ -80,18 +102,34 @@ async def redis_send_command(redis: Redis, command: dict):
 
 async def cleanup_task(redis, task_id: str, id=None):
     """
-    Remove a completed or canceled task from the global `tasks` dictionary.
+    Remove a completed or canceled task with proper exception handling.
     """
+    cleanup_errors = []
+
+    # Redis cleanup
     if redis:
+        try:
             await redis_cleanup_task(redis, task_id, id)
+        except Exception as e:
+            cleanup_errors.append(e)
+            log.error(f"Redis cleanup failed for task {task_id}: {e}")
 
-    tasks.pop(task_id, None)  # Remove the task if it exists
-
-    # If an ID is provided, remove the task from the item_tasks dictionary
+    # Local cleanup
+    try:
+        tasks.pop(task_id, None)
         if id and task_id in item_tasks.get(id, []):
             item_tasks[id].remove(task_id)
-        if not item_tasks[id]:  # If no tasks left for this ID, remove the entry
+            if not item_tasks[id]:
                 item_tasks.pop(id, None)
+    except Exception as e:
+        cleanup_errors.append(e)
+        log.error(f"Local cleanup failed for task {task_id}: {e}")
+
+    # If multiple errors occurred, group them
+    if len(cleanup_errors) > 1 and ExceptionGroup:
+        raise ExceptionGroup(f"Multiple cleanup errors for task {task_id}", cleanup_errors)
+    elif cleanup_errors:
+        raise cleanup_errors[0]
 
 
 async def create_task(redis, coroutine, id=None):