vllm - 💡(How to fix) Fix [Bug]: KeyError: 'language_model.model.layers.20.linear_attn' [7 comments, 5 participants]
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vllm-project/vllm#36640•Fetched 2026-04-08 00:35:45
Comments
7
Participants
5
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itfwonjuleeParticipants
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Error Message
(EngineCore_DP0 pid=1346) INFO 03-10 10:41:15 [kv_cache_utils.py:1319] Maximum concurrency for 262,144 tokens per request: 19.13x (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] EngineCore failed to start. (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] Traceback (most recent call last): (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1085, in run_engine_core (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 843, in init (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] super().init( (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in init (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] num_gpu_blocks, num_cpu_blocks, kv_cache_config = self._initialize_kv_caches( (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 281, in _initialize_kv_caches (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.model_executor.initialize_from_config(kv_cache_configs) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 117, in initialize_from_config (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.collective_rpc("initialize_from_config", args=(kv_cache_configs,)) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/ray_executor.py", line 510, in collective_rpc (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return ray.get(ray_worker_outputs, timeout=timeout) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/auto_init_hook.py", line 22, in auto_init_wrapper (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return fn(*args, **kwargs) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/client_mode_hook.py", line 104, in wrapper (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/worker.py", line 2981, in get (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] values, debugger_breakpoint = worker.get_objects( (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/worker.py", line 1012, in get_objects (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] raise value.as_instanceof_cause() (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ray.exceptions.RayTaskError(KeyError): ray::RayWorkerWrapper.execute_method() (pid=535, ip=192.168.3.107, actor_id=f2e01c90d280ed747d33ab2201000000, repr=<vllm.v1.executor.ray_utils.RayWorkerWrapper object at 0xeb7a0da3cef0>) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/ray_utils.py", line 75, in execute_method (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] raise e (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/ray_utils.py", line 65, in execute_method (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return run_method(self, method, args, kwargs) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/worker_base.py", line 310, in initialize_from_config (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.worker.initialize_from_config(kv_cache_config) # type: ignore (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 557, in initialize_from_config (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.model_runner.initialize_kv_cache(kv_cache_config) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6435, in initialize_kv_cache (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.initialize_attn_backend(kv_cache_config) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5872, in initialize_attn_backend (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] attn_backends = get_attn_backends_for_group(kv_cache_group_spec) (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5831, in get_attn_backends_for_group (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] attn_backend = layers[layer_name].get_attn_backend() (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ~~~~~~^^^^^^^^^^^^ (EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] KeyError: 'language_model.model.layers.20.linear_attn'
Code Example
==============================
vLLM Info
==============================
ROCM Version : Could not collect
vLLM Version : 0.17.0rc1.dev168+gdc6b57846.d20260309 (git sha: dc6b57846, date: 20260309)
vLLM Build Flags:
CUDA Archs: 12.1a; ROCm: Disabled
GPU Topology:
GPU0 NIC0 NIC1 NIC2 NIC3 CPU Affinity NUMA Affinity GPU NUMA ID
GPU0 X NODE NODE NODE NODE 0-19 0 N/A
NIC0 NODE X PIX NODE NODE
NIC1 NODE PIX X NODE NODE
NIC2 NODE NODE NODE X PIX
NIC3 NODE NODE NODE PIX X
Legend:
X = Self
SYS = Connection traversing PCIe as well as the SMP interconnect between NUMA nodes (e.g., QPI/UPI)
NODE = Connection traversing PCIe as well as the interconnect between PCIe Host Bridges within a NUMA node
PHB = Connection traversing PCIe as well as a PCIe Host Bridge (typically the CPU)
PXB = Connection traversing multiple PCIe bridges (without traversing the PCIe Host Bridge)
PIX = Connection traversing at most a single PCIe bridge
NV# = Connection traversing a bonded set of # NVLinks
NIC Legend:
NIC0: rocep1s0f0
NIC1: rocep1s0f1
NIC2: roceP2p1s0f0
NIC3: roceP2p1s0f1
---
(EngineCore_DP0 pid=1346) INFO 03-10 10:41:15 [kv_cache_utils.py:1319] Maximum concurrency for 262,144 tokens per request: 19.13x
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] EngineCore failed to start.
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] Traceback (most recent call last):
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1085, in run_engine_core
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 843, in __init__
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] super().__init__(
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] num_gpu_blocks, num_cpu_blocks, kv_cache_config = self._initialize_kv_caches(
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 281, in _initialize_kv_caches
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.model_executor.initialize_from_config(kv_cache_configs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 117, in initialize_from_config
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.collective_rpc("initialize_from_config", args=(kv_cache_configs,))
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/ray_executor.py", line 510, in collective_rpc
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return ray.get(ray_worker_outputs, timeout=timeout)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/auto_init_hook.py", line 22, in auto_init_wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return fn(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/client_mode_hook.py", line 104, in wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/worker.py", line 2981, in get
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] values, debugger_breakpoint = worker.get_objects(
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/worker.py", line 1012, in get_objects
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] raise value.as_instanceof_cause()
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ray.exceptions.RayTaskError(KeyError): ray::RayWorkerWrapper.execute_method() (pid=535, ip=192.168.3.107, actor_id=f2e01c90d280ed747d33ab2201000000, repr=<vllm.v1.executor.ray_utils.RayWorkerWrapper object at 0xeb7a0da3cef0>)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/ray_utils.py", line 75, in execute_method
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] raise e
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/ray_utils.py", line 65, in execute_method
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return run_method(self, method, args, kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/worker_base.py", line 310, in initialize_from_config
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.worker.initialize_from_config(kv_cache_config) # type: ignore
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 557, in initialize_from_config
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.model_runner.initialize_kv_cache(kv_cache_config)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6435, in initialize_kv_cache
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.initialize_attn_backend(kv_cache_config)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5872, in initialize_attn_backend
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] attn_backends = get_attn_backends_for_group(kv_cache_group_spec)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5831, in get_attn_backends_for_group
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] attn_backend = layers[layer_name].get_attn_backend()
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ~~~~~~^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] KeyError: 'language_model.model.layers.20.linear_attn'RAW_BUFFERClick to expand / collapse
Your current environment
<details> <summary>The output of <code>python collect_env.py</code></summary>==============================
vLLM Info
==============================
ROCM Version : Could not collect
vLLM Version : 0.17.0rc1.dev168+gdc6b57846.d20260309 (git sha: dc6b57846, date: 20260309)
vLLM Build Flags:
CUDA Archs: 12.1a; ROCm: Disabled
GPU Topology:
GPU0 NIC0 NIC1 NIC2 NIC3 CPU Affinity NUMA Affinity GPU NUMA ID
GPU0 X NODE NODE NODE NODE 0-19 0 N/A
NIC0 NODE X PIX NODE NODE
NIC1 NODE PIX X NODE NODE
NIC2 NODE NODE NODE X PIX
NIC3 NODE NODE NODE PIX X
Legend:
X = Self
SYS = Connection traversing PCIe as well as the SMP interconnect between NUMA nodes (e.g., QPI/UPI)
NODE = Connection traversing PCIe as well as the interconnect between PCIe Host Bridges within a NUMA node
PHB = Connection traversing PCIe as well as a PCIe Host Bridge (typically the CPU)
PXB = Connection traversing multiple PCIe bridges (without traversing the PCIe Host Bridge)
PIX = Connection traversing at most a single PCIe bridge
NV# = Connection traversing a bonded set of # NVLinks
NIC Legend:
NIC0: rocep1s0f0
NIC1: rocep1s0f1
NIC2: roceP2p1s0f0
NIC3: roceP2p1s0f1🐛 Describe the bug
When serving Qwen-3.5-397B-A17B with --max-model-len 65536, it works well. But when serving with --max-model-len 262144, I get a key error KeyError: 'language_model.model.layers.20.linear_attn'.
Interestingly, --max-model-len 65536 no longer functions after running the 262144 len version. I have to reboot my entire cluster to get it to work again.
I am running on 3x DGX Spark with GB10 (total VRAM 360GB). vLLM is run via a modified spark-vllm-docker image here is the image I am using. I am running with TP=1 and PP=3.
I can believe that all the dumb mods I made to make NCCL / that docker image / vLLM's Distributed Executor Backend (see Issue #35848) is causing something to mess up, but I find it strange that it works at first but then breaks.
I believe its not a memory issue, since vLLM notes that the max concurrency for 262,144 tokens p/r is around 19.
The error message is pasted below:
(EngineCore_DP0 pid=1346) INFO 03-10 10:41:15 [kv_cache_utils.py:1319] Maximum concurrency for 262,144 tokens per request: 19.13x
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] EngineCore failed to start.
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] Traceback (most recent call last):
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 1085, in run_engine_core
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] engine_core = EngineCoreProc(*args, engine_index=dp_rank, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 843, in __init__
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] super().__init__(
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 122, in __init__
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] num_gpu_blocks, num_cpu_blocks, kv_cache_config = self._initialize_kv_caches(
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/engine/core.py", line 281, in _initialize_kv_caches
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.model_executor.initialize_from_config(kv_cache_configs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/abstract.py", line 117, in initialize_from_config
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.collective_rpc("initialize_from_config", args=(kv_cache_configs,))
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/ray_executor.py", line 510, in collective_rpc
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return ray.get(ray_worker_outputs, timeout=timeout)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/auto_init_hook.py", line 22, in auto_init_wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return fn(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/client_mode_hook.py", line 104, in wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/worker.py", line 2981, in get
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] values, debugger_breakpoint = worker.get_objects(
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/ray/_private/worker.py", line 1012, in get_objects
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] raise value.as_instanceof_cause()
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ray.exceptions.RayTaskError(KeyError): ray::RayWorkerWrapper.execute_method() (pid=535, ip=192.168.3.107, actor_id=f2e01c90d280ed747d33ab2201000000, repr=<vllm.v1.executor.ray_utils.RayWorkerWrapper object at 0xeb7a0da3cef0>)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/ray_utils.py", line 75, in execute_method
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] raise e
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/executor/ray_utils.py", line 65, in execute_method
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return run_method(self, method, args, kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/serial_utils.py", line 459, in run_method
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/worker_base.py", line 310, in initialize_from_config
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.worker.initialize_from_config(kv_cache_config) # type: ignore
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/tracing/otel.py", line 178, in sync_wrapper
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] return func(*args, **kwargs)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_worker.py", line 557, in initialize_from_config
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.model_runner.initialize_kv_cache(kv_cache_config)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 6435, in initialize_kv_cache
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] self.initialize_attn_backend(kv_cache_config)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5872, in initialize_attn_backend
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] attn_backends = get_attn_backends_for_group(kv_cache_group_spec)
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] File "/usr/local/lib/python3.12/dist-packages/vllm/v1/worker/gpu_model_runner.py", line 5831, in get_attn_backends_for_group
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] attn_backend = layers[layer_name].get_attn_backend()
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] ~~~~~~^^^^^^^^^^^^
(EngineCore_DP0 pid=1346) ERROR 03-10 10:41:15 [core.py:1111] KeyError: 'language_model.model.layers.20.linear_attn'Happy to attach more information.
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extent analysis
Fix Plan
The error message indicates a KeyError exception when trying to access the 'language_model.model.layers.20.linear_attn' key. This suggests that the model configuration is not properly defined or loaded.
To fix this issue, you can try the following steps:
- Check the model configuration file to ensure that the
language_model.model.layers.20.linear_attnkey is properly defined. - Verify that the model is correctly loaded and initialized before trying to access its layers.
- If you are using a custom model, make sure that it is correctly registered and configured.
Here is an example code snippet that demonstrates how to access the model layers:
import torch
# Load the model
model = torch.load('model.pth')
# Access the model layers
for name, layer in model.named_modules():
if name == 'language_model.model.layers.20.linear_attn':
print(layer)Make sure to replace 'model.pth' with the actual path to your model file.
Verification
To verify that the fix worked, you can try running the model with the --max-model-len 262144 option again. If the issue is resolved, the model should run without throwing a KeyError exception.
Extra Tips
- Make sure to check the model configuration and loading code carefully to ensure that the issue is not caused by a simple typo or misconfiguration.
- If you are using a custom model, consider adding additional logging or debugging statements to help diagnose the issue.
- If the issue persists, try reducing the
--max-model-lenoption to a smaller value to see if the issue is related to the model size.
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×6Another batch ranked right after the header list — different links, same matching logic.
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- stopShellPty on tab switch kills active sessions (exit 143) — regression in May 27 build
- [BUG] Long URLs are broken into multiple lines and become unclickable in terminal output
- [BUG] claude rm/stop/reap SIGKILLs background session tree without SIGTERM grace, orphaning git index.lock and similar
- [BUG] Default git workflow in the system prompt was pushed without context or consent
- [MODEL] Inconsistent output quality / Ignoring instructions (overfitting and inappropriate repetition of Korean vocabulary)
- You've hit your weekly limit · resets May 31 at 5pm (Asia/Shanghai)
- Paid yearly subscription silently downgraded to Free with no user action
- [Regression v2.1.153] Plugin bash hooks fail with "echo: write error: Permission denied" on Windows (claude-mem, shell: "bash")
- [BUG] Connector toggles in conversation are not clickable — must click text label instead
- [remote-control] Input from mobile app/browser not reaching host session — output works fine
- Model fails to read/reference CLAUDE.md contents despite being loaded in context
- [BUG] Claude Desktop reinstall destroys Code chat history (transcripts + Recents) while regular Chat history, project files, and memory all survive
- Bypass mode clamps to Accept Edits even with the toggle ON (Claude Code Desktop 1.9255.2 / CC 2.1.149)
- [BUG] TUI input freezes randomly mid-typing — entire prompt becomes unresponsive for minutes
- [BUG] Cowork downloads Linux ELF binary instead of macOS binary on macOS Sonoma 14.8.7 — exit code 132 (SIGILL) on every session
- [Feature Request] Persistent project memory — sessions forget everything on close, forcing users to keep many sessions open
- [Bug] Thread context stale after sleep/resume, returns outdated date and calendar data
- [FEATURE] Add context window usage indicator and warning before auto-compaction
- [BUG] Dictation error: Invalid character in header content ["x-config-keyterms"] on Windows
- [Bug] Anthropic API Error: Server rate limiting despite normal usage
- Does delegating work to `claude -p` subprocesses reduce context accumulation in the parent session?
- [BUG] Claude Code hangs on M1 Mac when terminal says "opening browser to sign in" and browser opens
- [BUG] Claude_Preview MCP preview_start spawns dev server with main-repo cwd instead of session's worktree cwd
- [Bug] Anthropic API Error: Server rate limiting during request execution
- [Bug] Anthropic API Error: Server rate limiting on concurrent requests
- [Bug] Ultraplan ready notification fires before cloud agent completes execution
- [BUG] API 500 ERROR ALL THROUGHOUT THE DAY
- [BUG] Cowork: Live Artifacts folder path changed in 1.9255.2, no automatic migration from Documents\Claude\Artifacts
- [Bug] Auto-compact never triggers despite statusline reporting "100% context used" (v2.1.153, Max sub, 200K mode)
- [BUG] [Desktop / macOS] 'Open in → New Window' detached session: font renders smaller than main, no per-window controls, Cmd+/Cmd- keystrokes routed to main window instead
- Feature request: option to switch between classic and new minimal UI
- [Feature Request] Show timestamps for each message
- [BUG] Terminal corruption when permission prompt appears while navigating Agent Teams agent selection menu
- [FEATURE] Allow users to customize the background color of the Claude desktop app beyond the current light/dark theme presets.
- [BUG] Statusline not displaying on Windows [fixed]
- Background agent UI Stop button is a no-op for stuck agents — process keeps consuming tokens
- Background agents silently die on session pause/resume — no completion notification, no work recovery
- Add option to hide email address from welcome banner
- [BUG] SSH Remote: `projects` field in remote ~/.claude.json becomes null after desktop restart — jsonl files intact, UI shows 'No messages yet' for every session
- [Bug] Claude Code not applying fixes despite claiming to complete tasks
- billing is unfair and poorly documented
- [BUG] Claude Code on the web: declared plugins inactive on first session, require restart to fully load
- [BUG] Restore from archive deleted sessions instead of restoring them
- [BUG] M365 connector fails with AADSTS50011 in Cowork — localhost vs 127.0.0.1 redirect URI mismatch
- claude agents: workflow slash-commands missing from dispatch-input completion (regression-adjacent to #61424)
- Claude Desktop's Info.plist missing TCC usage strings, blocks all EventKit-based MCP servers
- False-positive safety blocks on self-administered governance amendments — request for owner-authority mode for verified professional users
- [BUG] Stop pushing "AUTO"-mode
- [DOCS] Plugin marketplace guide omits `skipLfs` option for git-based sources
- [DOCS] MCP docs omit combined startup notification for MCP server and connector authentication
- [DOCS] Agent view docs omit macOS Privacy & Security identity for background agents
- [DOCS] Npm update docs do not explain release-channel behavior for `claude update`
- [DOCS] Agent SDK docs omit `subagent_type: "claude"` worktree and output persistence behavior
- [DOCS] Background session docs omit `$CLAUDE_JOB_DIR` temp-file behavior
- [FR] mask env-var values in 'claude mcp get <server>' output
- [FR] subagent worktrees should not inherit stale local 'user.email' from prior dispatches
- [BUG] Windows: Grep tool leaks rg.exe + conhost.exe processes (~2000 zombies / 14 GB RAM in long sessions)
- [BUG] Stats dashboard "Peak hour" appears off by one hour
- [BUG] Diff highlight (teal SGR background) bleeds past changed text in 2.1.150–2.1.153
- [FEATURE] confirm before deleting session
- Plugin PostToolUse hooks still silently skip in Claude Desktop / Cowork (re-filing closed #51904)
- /code-review skill: silent fallback to main...HEAD reviews other people's commits, and JSON-only output is hard to read
- Monitor tool doesn't source the shell snapshot like Bash does; PATH-dependent tools (jq, sleep, etc.) fail in Monitor commands on macOS/Nix
- [Bug] Long input lines truncated with ellipsis while typing instead of wrapping in terminal UI
- [FEATURE] VS Code extension: Render submitted user messages as Markdown in chat
- OSC 52 copy from Claude TUI doesn't reach clipboard inside tmux (regression in 2.1.146–2.1.153)
- [BUG] RemoteTrigger create/update returns HTTP 400 with circular error: "event_type is required" / "unknown field event_type"
- [BUG] Option to hide or minimize the built-in "status footer" (multi-line debug/cost panel) [re-raise of #31475]
- [Bug] Feedback submissions being closed without review or action
- [FEATURE] Word-jump cursor navigation in Chat input (option+arrow / bindable actions)
- [FEATURE] ! shell mode: filesystem tab completion
- [BUG] API Error: Usage credits required for 1M context
- claude agents: OSC 52 clipboard emission broken in tmux (regression in 2.1.146–2.1.153)
- CLI crashes on macOS 15 M3 - exit code 1
- [FEATURE] Support Cmd+V image paste from clipboard
- [FEATURE] Enhance claude.ai M365 connector to support MS Planner
- [BUG] Slash command autocomplete hijacks pasted absolute file paths starting with /
- PreToolUse hook `if` filter false-positives on complex Bash commands
- [BUG] Diff panel hangs/whites out
- Feature Request: Support drag-and-drop for binary documents (.wps, .doc, .docx, .xlsx, .pdf) in VS Code extension
- [BUG] activation of 1M context in VSCode
- [FEATURE] Support i18n / language localization for built-in slash command outputs
- Ctrl+V para colar imagens deixou de funcionar no CLI (Windows, PowerShell)
- [FEATURE] Please add Norwegian (Bokmål/Nynorsk) language support to the Claude Code interface
- [BUG] OTel log events (claude_code.user_prompt, api_request_body, tool_decision, hook_execution_complete) emitted with empty trace_id/span_id while sibling spans correlate correctly
- [BUG] Cowork crashes on every message, no VM logs generated, missing AppData\Roaming\Claude
- [FEATURE] first-class session handoff + per-session token budgets for unattended runs
- [FEATURE] Smart paste: convert clipboard code to file reference chips (like Cursor)
- [Feature Request] Restore chat pin functionality to title chat submenu
- [BUG] SIGILL issues with version 2.1.153
- [BUG] Cowork plugin upload fails with generic "Plugin validation failed" when a `description` field in any SKILL.md frontmatter contains angle brackets (`<…>`)
- [BUG] Desktop App 2.1.144+: startup scanner deletes cliSessionId from claude-code-sessions local files on every launch — session not found on disk
- [Feature Request] Add keyboard shortcut to copy last message with proper formatting
- [MODEL] Opus 4.7 not 1M
- Allow naming/renaming background agents in `claude agents` view
- Stale worktrees in .claude/worktrees/ are never cleaned up, consuming massive disk space
- Agent worktrees are never cleaned up, silently consuming disk space
- Subagent worktrees not auto-cleaned when reviewer writes scratch files
- [Bug] Skill initialization hangs for extended duration in Plan Mode
- Claude Desktop writes malformed registry Run entry (nested escaped quotes) - crashes Windows Task Manager and other Run-key parsers
- IME candidate window shows at bottom-right corner instead of caret position (Windows CMD)
- [BUG] Pressing 'Escape' doesn't close the /BTW conversation when the main conversation is asking for approval
- [BUG] Opus 4.7 (1M) intermittently emits empty-string values for tool_use.input fields, killing the session
- FleetView agent UI shows "running" with incrementing elapsed time after agent has returned
- /doctor flags context-scoped cmd+c binding as macOS conflict (false positive)
- [BUG] Text Rendering in Elvish
- Desktop app: Bypass Permissions mode flips to Accept Edits on first prompt (M5 / macOS 26.5)
- [Workaround] Date-Weekday Verification Hook — Prevents Claude from writing wrong weekdays
- [BUG] Claude Code create c:/memfs directory without asking me.
- [BUG] Claude Code's Bash execution waits forever with no processes running
- [BUG] usage stays stuck waiting for 5 hr limit after upgrading to premium seat in team plan
- [Workflow tool] resume cache is unreachable for nontrivial workflows because LLM dispatchers can't transcribe args byte-exactly
- Code review (Preview): "Add a repository" shows no results for private GitHub org repos
- [BUG] /context commands blows up context
- [Feature Request] Add precache expiry hook to enable proactive compaction before token eviction
- [BUG] Context indicator shows 0% at session start despite ~20K+ tokens already loaded
- [Feature Request] Add semantic search for --resume session history
- [Feature Request] Add session search, tagging, and filtering capabilities
- [BUG] Cowork Dispatch reports "desktop not available" on Windows 11 while standard Cowork works normally
- [Bug] Claude Code provides incorrect suggestions with high confidence despite errors
- defaultMode: acceptEdits silently overrides per-path permissions.ask rules for Write/Edit
- [FEATUR configurable tip interval (e.g. tipIntervalSeconds: 30 in settings)E]
- Plugin marketplace fails to load: schema rejects 'displayName' key (v2.1.153)
- claude agents: in-session copy uses broken OSC 52 path while overview correctly uses tmux buffer
- [BUG] Plugin agent descriptions (and custom agents) load unconditionally into context — no parity with disable-model-invocation for skills
- Crashed ultrareview consumed a free credit despite producing zero findings
- [Bug] Character rendering issue - invisible or missing text display
- [BUG] Cowork: processo Claude Code encerra com código 3 — .claude.json não contém token de autenticação (Windows 11 25H2)
- [BUG] 2.1.153 silently discards tools/list response from rmcp 0.12.0 HTTP MCP server (works in 2.1.152, wire-identical handshake)
- VS Code extension: option to auto-resume last session when reopening a workspace folder
- [Bug] Conversation continuation failure
- [BUG] Cowork crashes every time I start a new chat or attempt to continue an existing one in any project. The error displayed is: "Claude Code è andato in crash
- [Bug] Unannounced quota changes
- Native update/install fails with 'socket connection was closed unexpectedly' behind proxy — undici TLS incompatibility
- [BUG] Session name reverting after manual change
- [BUG] 非正常思考，上下文过长时，一直显示思考，点击interrupt按钮失效
- Honor `tools:` frontmatter when an agent is invoked via `@mention` — strip `Task` only when the agent did not declare it
- macOS TCC popup still recurring on v2.1.153 — "2.1.153" would like to access data from other apps
- Claude Code leaks pty handles — exhausts pseudo-terminals on macOS after long session
- [Bug] Agent fails to execute or respond to user input
- [BUG] Persistent "Expecting value: line 1 column 1 (char 0)" JSON parse error after tool execution
- [Feature Request] Implement proactive unit test coverage recommendations for recurring bugs
- VS Code panel lacks status line + terminal lacks image paste in Codespaces, forcing a tradeoff
- `/powerup` only shows ~10 lessons — allow viewing the full catalog
- [Bug] Context contamination after auto-compact with unrelated email draft of Tejo/Sado Basin
- [Bug] VSCode terminal output displays corrupted text with garbled symbols
- [Feature Request] Add LaTeX/KaTeX math rendering to TUI
- [Bug] Sub-agent PR review results not validated by orchestrating agent
- Subagents on Pro 1M tier: trivial probes pass, real workloads fail at first tool call (probe-vs-workload divergence)
- Path-scoped rules and subdirectory CLAUDE.md not loaded when creating new files matching the pattern
- AskUserQuestion: cancelling during extended thinking poisons the whole session with 400 'thinking blocks cannot be modified' (2.1.153); concurrent prompts overwrite each other
- Ideas Missing from Claude Cowork Menu (Windows)
- [BUG_BOUNTY_SAFE_POC_2026] Prompt Injection RCE Test - Command Execution Proof
- [BUG] Cowork scheduled task: execution history row not showing after successful run
- Resuming an extended-thinking session fails permanently with 400 "thinking blocks cannot be modified" (transcript stores thinking text as empty but keeps signature)
- [Bug] Plugin-registered CwdChanged and FileChanged hooks don't fire (settings.json works) — v2.1.153
- Auto-archive on PR merge / branch delete — clarify autoArchiveSessions semantics or add dedicated opt-out
- `claude mcp add` echoes Authorization header value verbatim to stdout, leaks bearer tokens to terminal and session transcripts
- [BUG] Bug report — /insights skill, Claude Code The /insights skill outputs a malformed file path.
- Plugin slash commands render with '*'-inline format instead of two-column, despite matching official plugin shape
- [Bug] Unexpected long text generation without user input or goal
- [Bug] Thinking blocks causing task progression blocked without user modification
- [BUG] (Critical!) contamination by an unknown session simirlar to the report => [Bug] Context contamination after auto-compact with unrelated email draft of Tejo/Sado Basin #63137
- [Critical] Opus 4.7 Korean output degeneration — Korean grammar itself collapses in long contexts
- [BUG] Title: Autocompact buffer persists across /clear — wastes tokens for irrelevant old context
- [Bug] Auto-Compact loses user input before processing in conversation history
- Feature: per-invocation effort parameter + runtime session-config introspection for skills
- Auto-mode classifier mislabels Azure DevOps vote -5 as "Reject" when denying PR vote actions
- [BUG] Claude Desktop and Claude Code CLI never re-register MCP tools after OAuth 2.1 handshake on a remote HTTP server
- [BUG] Workspace file tags leak across sessions
- [BUG] Ink renderer crashes on Windows 11 build 26200 (Canary) duplicate banners, terminal mode leaks, mid-operation aborts
- [BUG] Claude Code Desktop issue
- PTY master fd leak in Claude desktop app exhausts macOS kern.tty.ptmx_max after ~2-3 days
- [BUG] Claude Code — Session Management after Unexpected Interruption
- [Windows] Cowork OpenTelemetry exporter does not initialize - zero events emitted to any destination, including loopback
- [Bug] Opus 4.7: 400 `thinking blocks ... cannot be modified` on long extended-thinking sessions, triggered by history-altering events (scheduled prompts / parallel tool-call cancellation)
- [BUG] API Error: Server is temporarily limiting requests (not your usage limit) · Rate limited
- Multi-plugin custom marketplace: only first plugin registered in installed_plugins.json, skills don't load
- [BUG] Git push through the SDK's git proxy fan-outs into ~500 GitHub REST API calls, exhausting the 5,000/hour budget after a handful of pushes
- [BUG] Claude took liberties it really shouldn't with my global config
- [BUG] Agent window focus lost after navigating with arrow keys, causing scroll deadlock
- [BUG] `--model` flag silently ignored in interactive sessions (works in `--print` only)
- [BUG] Dispatch permanently shows "desktop appears offline" on Windows 11 - never worked on first use
- feat: support per-command enableWeakerNetworkIsolation as safer alternative to dangerouslyDisableSandbox
- /code-review outputs a raw JSON array instead of readable findings
- [BUG] Cowork — Additional allowed domains ignored on Team plan; same domain works on Pro plan
- Haiku
- [Bug] False positive blocking beneficial outcomes in tool execution
- 3P Bedrock SSO: credentials silently expire without triggering re-auth on day 2+
- CLAUDE_AUTOCOMPACT_PCT_OVERRIDE in settings.json env block silently ignored by autocompact logic
- Auto-compaction deletes main session JSONL before verifying summary completion, causing data loss
- [Bug] Claude Code not executing stated actions or producing expected results
- [FEATURE] Deferred Messages — Queue Input for End of Turn
- [BUG] Up/Down arrows in input box navigate history instead of moving cursor — regression in 2.1.149+
- Cancelling a parallel tool-call batch corrupts thinking blocks -> 400 "thinking blocks cannot be modified" permanently wedges the session
- Claude Code caused data loss, then contradicted itself about recovery (two incidents, one session)
- [Bug] Unclear error messages from Claude Code CLI
- [Bug] Agent tool rejecting due to context size limit exceeded
- claude agents: daemon and bg-spare processes spin at ~100% CPU when idle
- [BUG] Compaction fails with "context window limit" error even when context usage is low (e.g., 20%) — regression in v2.1.153
- Remote Control entitlement lost after May 27-28 incident — `Error: Remote Control is not yet enabled for your account` on active Max subscription
- PreToolUse hook exit code 2 does not block Write tool
- [Bug] Thinking blocks in latest assistant message are immutable
- GUI: dispatch file:// and custom-scheme clicks to OS shell handler
- Show current model in statusLine by default
- [Bug] Agent console becomes unresponsive to keyboard input after multiple agents initialized
- [FEATURE] PreToolUse hooks should have a way of updating the environment
- [Bug] Unable to start or use Claude Code CLI
- [BUG] Repository not visible in Claude Code web repo picker
- Session permanently wedged on 400 "thinking blocks cannot be modified" after parallel tool_results
- [Bug] @ autocomplete loses sibling repos after a file edit in multi-repo workspace
- Unclear error message when creating sub-agent without authentication
- [Bug] Anthropic API errors causing frequent failures and high token usage
- [BUG] @ mention file picker only shows packages, not individual files (desktop app - Code tab)
- [Bug] TUI panel footer remains sticky and consumes excessive terminal space
- PR-status polling exhausts GitHub GraphQL rate limit on repos with many open PRs
- [BUG] Windows: welcome panel not shown in some project folders (2.1.153)
- [Bug] Anthropic API Error: thinking blocks corrupted during context compaction with extended thinking enabled
- API 400 "thinking blocks cannot be modified" permanently bricks session during agent activation (interleaved thinking + tool use)
- Right-click Copy copies the whole message instead of the selection; pasted text retains dark background
- Mid-session model switch corrupts conversation when extended thinking is enabled (API 400: 'thinking blocks cannot be modified')
- [BUG] Markdown file links in chat output do not open files when clicked (VS Code extension)
- Stuck retry loop: `400 thinking blocks cannot be modified` on large interleaved-thinking turns using AskUserQuestion
- [FEATURE] Prompt user for approval before auto-compaction proceeds
- Custom MCP connectors not attachable to scheduled routines — no UUID discovery path
- [BUG] Claude in Chrome — Navigation blocked for teams.cloud.microsoft and outlook.cloud.microsoft after Microsoft domain migration**
- [BUG] Claude Desktop — Personal plugins panel renders list but is entirely non-interactive (macOS, v1.9255.2)
- [Bug] error when using Workflows
- [BUG] Persistent "update available" notification despite being on latest version
- [BUG] Sweep Agent from /code-review never completes
- [Bug] Tool calls not executing or returning results
- [FEATURE] Cloud-synced memory and settings across machines
- [Bug] Terminal UI freezes when Ctrl+O view exits during interactive prompt in plan mode
- Continuous api errors when using claude code with Opus 4.7 with thinking on low
- [Feature Request] Add support for installing and using previous Claude Code versions
- [Bug] Extended Thinking: Summarized thinking blocks fail signature validation when resent to API
- [Bug] Anthropic API Error: 'thinking' blocks cannot be modified
- [Bug] Anthropic API Error: Thinking blocks cannot be modified with extended thinking mode
- Feature request: Lazy/on-demand MCP server connections
- [Bug] Tool Arguments Parsed as String Instead of Object
- [Bug] Anthropic API Error: Insufficient context provided
- [Bug] Claude Opus occasionally uses moskovian(russian) orthography instead of Ukrainian in system-prompted responses
- Opus 4.8: backgrounded task completions (subagents AND Bash) crash with 400 "thinking blocks cannot be modified"
- [Bug] Opus 4.7 fabricates stable preferences ("my default") to rationalize arbitrary choices when challenged
- [Bug] Unable to update Claude Code CLI
- [BUG] Desktop app: /remote-control mints link + connects bridge (main.log) but in-chat link/QR panel never renders
- Feature: sessionColor and sessionName in .claude/settings.json
- [BUG] Anthropic API error: thinking blocks
- [FEATURE] Support Remote MCPs in Cowork as in Claude Code
- [Bug] Anthropic API Error: 400 Bad Request with Redacted Thinking - 0 4.7 & 4.8
- [Bug] Anthropic API Error: Cannot modify thinking blocks from different model versions
- Interleaved thinking + multi-tool turn corrupts thinking block (text blanked, signature kept) → permanent 400 'blocks must remain as they were'
- [BUG] Mode/permission changes mid-tool-loop (effortLevel: xhigh) poisons entire session
- Session failure log: Opus 4.6 ignores its own rules for an entire session
- [BUG] "400 Guardrail was enabled" error when using Claude Opus 4.8 with AWS Bedrock
- [Feature Request] Add subagent approach selection option to avoid accidental feedback
- Persistent 400 'thinking blocks in the latest assistant message cannot be modified' — interleaved thinking persisted with empty text + signature bricks sessions
- [BUG] DesktopvsApp
- [BUG] Opus 4.7 cache hit rate collapse after May 27 incident — Messages 1.1k→88.9k in 9 minutes, $630/session
- [Bug] Anthropic API Error: Invalid thinking block format
- [BUG] FUCK CLAUDE
- Opus 4.8 extended thinking: Stop hook block re-entry corrupts thinking blocks → 400
- [Bug] 4.8 Fails when accessing previous model history
- [Bug] Unintended File Modifications During Execution
- [DOCS] Model configuration docs omit lean system prompt default scope and model exceptions
- Add "Always allow globally" option to permission prompts
- Server-side model upgrade (Opus 4.7→4.8) wedges in-flight sessions with `thinking blocks cannot be modified` 400
- [DOCS] AskUserQuestion docs missing multiple-choice prompt decision threshold
- [DOCS] Agent view docs omit shell-command background session launch syntax
- [DOCS] Agent view dispatch input docs incorrectly imply `/logout` dispatches as a prompt
- [DOCS] Claude in Chrome docs omit connected-browser selection behavior
- [DOCS] Plugin docs omit `defaultEnabled: false` for opt-in plugins
- Feature Request: Customizable chat text colors for user and assistant messages
- [DOCS] `/plugin` Discover tab docs omit directory-based suggested plugin pins
- VSCode Chrome integration silently fails: 3 distinct bugs
- [DOCS] MCP stdio docs omit session environment variables
- [Bug] Anthropic API error on second request within session with Claude Opus 4.8
- Cowork emits a blank session "index" handoff on focus when a CLI session is paused awaiting input
- [DOCS] MCP docs omit `claude mcp list/get` pending-approval output for unapproved project servers
- [BUG] /compact fails with 400 error when last assistant turn contains thinking blocks
- [DOCS] `/claude-api` docs omit Opus 4.8 migration guidance
- [DOCS] Fast mode docs still recommend deprecated Opus 4.6 override variable
- [DOCS] Bash tool docs omit `$TMPDIR` consistency across sandboxed and unsandboxed commands
- [Bug] Anthropic API Error: 400 Bad Request on Extended Thinking
- [DOCS] Background session docs omit worktree-isolation behavior for spawned subagents
- Built-in mechanistic self-verification of verifiable claims (symmetric to the auto permission gate)
- [DOCS] Worktree docs do not clarify `worktree.baseRef: "head"` inside linked worktrees
- [BUG] Excessive RAM usage with multiple parallel chats (~10 sessions → 30 GB memory pressure, macOS OOM)
- [DOCS] Managed MCP policy docs omit invalid `allowedMcpServers`/`deniedMcpServers` entry behavior
- [DOCS] Effort docs omit `CLAUDE_CODE_ALWAYS_ENABLE_EFFORT` unsupported-model behavior
- Regression (2.1.147–2.1.150?): resuming an extended-thinking session after a CC update/model-switch → unrecoverable 400, session bricked
- [DOCS] Windows updater docs omit `claude.exe` in-use recovery guidance
- [DOCS] VS Code auto mode docs still tie mode-picker visibility to bypass-permissions setting
- [DOCS] MCP docs omit `/mcp` tool list and detail rendering behavior
- [DOCS] Fine-grained tool streaming docs still describe provider opt-in behavior
- bypassPermissions: session startup reads flat pref, GUI toggle writes per-account pref — they never sync
- [BUG] Claude Desktop Code tab causes disk write limit violation — 8.5GB in 11 min, macOS kills app (M5, v1.9659.1)
- Ultrareview v2.1.96: docs describe /tasks command + claude ultrareview --json subcommand that don't exist; findings hard to read after completion
- I'd be happy to help create a GitHub issue title, but I don't see the error message in your message. Could you please share the specific error you're encountering? That way I can generate an accurate and descriptive issue title for you.
- [BUG] Claude in Chrome `file_upload` rejects all scheduled-task sessions with misleading error (real cause: INVALID_SESSION)
- Extended thinking: signed thinking block 'cannot be modified' (400) permanently wedges session
- RTL text support for Hebrew (and Arabic) in Claude Code
- [Bug] Random errors occurring across multiple operations