await node process_prompt with timeoout

exo/api/chatgpt_api.py

@@ -268,9 +268,10 @@ class ChatGPTAPI:
     callback = self.node.on_token.register(callback_id)
 
     if DEBUG >= 2: print(f"Sending prompt from ChatGPT api {request_id=} {shard=} {prompt=} {image_str=}")
-    asyncio.create_task(self.node.process_prompt(shard, prompt, image_str, request_id=request_id))
 
     try:
+      await asyncio.wait_for(self.node.process_prompt(shard, prompt, image_str, request_id=request_id), timeout=self.response_timeout)
+
       if DEBUG >= 2: print(f"Waiting for response to finish. timeout={self.response_timeout}s")
 
       if stream:
@@ -345,6 +346,9 @@ class ChatGPTAPI:
         return web.json_response(generate_completion(chat_request, tokenizer, prompt, request_id, tokens, stream, finish_reason, "chat.completion"))
     except asyncio.TimeoutError:
       return web.json_response({"detail": "Response generation timed out"}, status=408)
+    except Exception as e:
+      if DEBUG >= 2: traceback.print_exc()
+      return web.json_response({"detail": f"Error processing prompt (see logs with DEBUG>=2): {str(e)}"}, status=500)
     finally:
       deregistered_callback = self.node.on_token.deregister(callback_id)
       if DEBUG >= 2: print(f"Deregister {callback_id=} {deregistered_callback=}")