Crash the CI jobs on model import errors (#2072)

python/sglang/srt/layers/sampler.py

@@ -8,7 +8,7 @@ from torch import nn
 from sglang.srt.layers.logits_processor import LogitsProcessorOutput
 from sglang.srt.managers.schedule_batch import global_server_args_dict
 from sglang.srt.sampling.sampling_batch_info import SamplingBatchInfo
-from sglang.srt.utils import is_flashinfer_available
+from sglang.srt.utils import crash_on_warnings, is_flashinfer_available
 
 if is_flashinfer_available():
     from flashinfer.sampling import (
@@ -19,10 +19,6 @@ if is_flashinfer_available():
     )
 
 
-# Crash on warning if we are running CI tests
-crash_on_warning = os.getenv("SGLANG_IS_IN_CI", "false") == "true"
-
-
 logger = logging.getLogger(__name__)
 
 
@@ -46,7 +42,8 @@ class Sampler(nn.Module):
             logits = torch.where(
                 torch.isnan(logits), torch.full_like(logits, -1e5), logits
             )
-            exit(1) if crash_on_warning else None
+            if crash_on_warnings():
+                raise ValueError("Detected errors during sampling! NaN in the logits.")
 
         if sampling_info.is_all_greedy:
             # Use torch.argmax if all requests use greedy sampling

python/sglang/srt/managers/scheduler.py

@@ -67,6 +67,7 @@ from sglang.srt.server_args import PortArgs, ServerArgs
 from sglang.srt.utils import (
     broadcast_pyobj,
     configure_logger,
+    crash_on_warnings,
     get_zmq_socket,
     kill_parent_process,
     set_random_seed,
@@ -76,10 +77,6 @@ from sglang.utils import get_exception_traceback
 
 logger = logging.getLogger(__name__)
 
-
-# Crash on warning if we are running CI tests
-crash_on_warning = os.getenv("SGLANG_IS_IN_CI", "false") == "true"
-
 # Test retract decode
 test_retract = os.getenv("SGLANG_TEST_RETRACT", "false") == "true"
 
@@ -662,21 +659,23 @@ class Scheduler:
             self.token_to_kv_pool.available_size() + self.tree_cache.evictable_size()
         )
         if available_size != self.max_total_num_tokens:
-            warnings.warn(
-                "Warning: "
-                f"available_size={available_size}, max_total_num_tokens={self.max_total_num_tokens}\n"
+            msg = (
                 "KV cache pool leak detected!"
+                f"{available_size=}, {self.max_total_num_tokens=}\n"
             )
-            exit(1) if crash_on_warning else None
+            warnings.warn(msg)
+            if crash_on_warnings():
+                raise ValueError(msg)
 
         if len(self.req_to_token_pool.free_slots) != self.req_to_token_pool.size:
-            warnings.warn(
-                "Warning: "
-                f"available req slots={len(self.req_to_token_pool.free_slots)}, "
-                f"total slots={self.req_to_token_pool.size}\n"
+            msg = (
                 "Memory pool leak detected!"
+                f"available_size={len(self.req_to_token_pool.free_slots)}, "
+                f"total_size={self.req_to_token_pool.size}\n"
             )
-            exit(1) if crash_on_warning else None
+            warnings.warn(msg)
+            if crash_on_warnings():
+                raise ValueError(msg)
 
     def get_next_batch_to_run(self):
         # Merge the prefill batch into the running batch

python/sglang/srt/model_executor/model_runner.py

@@ -20,6 +20,7 @@ import importlib
 import importlib.resources
 import json
 import logging
+import os
 import pkgutil
 from functools import lru_cache
 from typing import Optional, Type
@@ -56,6 +57,7 @@ from sglang.srt.model_executor.forward_batch_info import ForwardBatch
 from sglang.srt.sampling.sampling_batch_info import SamplingBatchInfo
 from sglang.srt.server_args import ServerArgs
 from sglang.srt.utils import (
+    crash_on_warnings,
     enable_show_time_cost,
     get_available_gpu_memory,
     monkey_patch_vllm_p2p_access_check,
@@ -665,7 +667,9 @@ def import_model_classes():
             try:
                 module = importlib.import_module(name)
             except Exception as e:
-                logger.warning(f"Ignore import error when loading {name}. " f"{e}")
+                logger.warning(f"Ignore import error when loading {name}. {e}")
+                if crash_on_warnings():
+                    raise ValueError(f"Ignore import error when loading {name}. {e}")
                 continue
             if hasattr(module, "EntryClass"):
                 entry = module.EntryClass

python/sglang/srt/models/phi3_small.py

 import math
-from typing import Dict, Iterable, List, Optional, Tuple, Union
+from typing import Iterable, Optional, Tuple, Union
 
 import torch
 from torch import nn
 from transformers import Phi3Config
 from transformers.configuration_utils import PretrainedConfig
-from vllm.distributed import get_pp_group, get_tensor_model_parallel_world_size
+from vllm.distributed import get_tensor_model_parallel_world_size
 from vllm.model_executor.layers.rotary_embedding import get_rope
 from vllm.model_executor.model_loader.weight_utils import default_weight_loader
-from vllm.model_executor.models.utils import make_layers, maybe_prefix
+from vllm.model_executor.models.utils import make_layers
 
 from sglang.srt.layers.linear import (
     MergedColumnParallelLinear,
@@ -339,7 +339,7 @@ class Phi3SmallForCausalLM(nn.Module):
         self,
         config: Phi3Config,
         quant_config: Optional[QuantizationConfig] = None,
-        prefix: str = "",
+        cache_config=None,
     ):
 
         super().__init__()
@@ -349,7 +349,7 @@ class Phi3SmallForCausalLM(nn.Module):
         self.model = Phi3SmallModel(
             config=config,
             quant_config=quant_config,
-            prefix=maybe_prefix(prefix, "model"),
+            prefix="model",
         )
         self.torchao_config = global_server_args_dict["torchao_config"]
         self.vocab_size = config.vocab_size

python/sglang/srt/utils.py

@@ -816,3 +816,8 @@ def get_nvgpu_memory_capacity():
         raise RuntimeError(
             "nvidia-smi not found. Ensure NVIDIA drivers are installed and accessible."
         )
+
+
+def crash_on_warnings():
+    # Crash on warning if we are running CI tests
+    return os.getenv("SGLANG_IS_IN_CI", "false") == "true"