Concurrency and Prompt Template fix

src/engine.py

@@ -13,14 +13,16 @@ class Tokenizer:
         self.has_chat_template = bool(self.tokenizer.chat_template)
 
     def apply_chat_template(self, input: Union[str, list[dict[str, str]]]) -> str:
-        if isinstance(input, list) and not self.has_chat_template:
-            raise ValueError(
-                "Chat template does not exist for this model, you must provide a single string input instead of a list of messages"
-            )
+        if isinstance(input, list):
+            if not self.has_chat_template:
+                raise ValueError(
+                    "Chat template does not exist for this model, you must provide a single string input instead of a list of messages"
+                )
         elif isinstance(input, str):
             input = [{"role": "user", "content": input}]
         else:
             raise ValueError("Input must be a string or a list of messages")
+        
         return self.tokenizer.apply_chat_template(
             input, tokenize=False, add_generation_prompt=True
         )
@@ -39,7 +41,7 @@ class VLLMEngine:
             "download_dir": os.getenv("MODEL_BASE_PATH", "/runpod-volume/"),
             "quantization": os.getenv("QUANTIZATION"),
             "dtype": "auto" if os.getenv("QUANTIZATION") is None else "half",
-            "disable_log_stats": bool(int(os.getenv("DISABLE_LOG_STATS", 1))),
+            "disable_log_stats": bool(int(os.getenv("DISABLE_LOG_STATS", 0))),
             "gpu_memory_utilization": float(os.getenv("GPU_MEMORY_UTILIZATION", 0.98)),
             "tensor_parallel_size": self._get_num_gpu_shard(),
         }
@@ -65,8 +67,10 @@ class VLLMEngine:
         return total_sequences
     
     def concurrency_modifier(self, current_concurrency):
-        requested_concurrency = max(0, self.serverless_config.max_concurrency - self._get_n_current_jobs())
+        n_current_jobs = self._get_n_current_jobs()
+        requested_concurrency = max(0, self.serverless_config.max_concurrency - n_current_jobs)
         if not self.config["disable_log_stats"]:
+            logging.info("Current Jobs: %s", n_current_jobs)
             logging.info("Concurrency Modifier Requested Jobs: %s", requested_concurrency)
         return requested_concurrency
 

src/handler.py

@@ -52,7 +52,8 @@ async def handler(job: dict) -> Generator[dict, None, None]:
 runpod.serverless.start(
     {
         "handler": handler,
-        "concurrency_modifier": vllm_engine.concurrency_modifier,
+        # "concurrency_modifier": vllm_engine.concurrency_modifier,
+        "concurrency_modifier": lambda x: vllm_engine.serverless_config.max_concurrency,
         "return_aggregate_stream": True,
     }
 )