{
  "schema": "anvil-serving.runtime-incident-correlation/v1",
  "observed_at": "2026-09-23T16:57:18Z",
  "native_trial": "baseline-175k-overlap.json",
  "native_classification": [
    "protocol_error",
    "coverage_not_exercised"
  ],
  "owner_classification": "CUDA illegal memory access with EngineDeadError and process exit",
  "kernel_classification": "Xid 31 FAULT_PDE ACCESS_TYPE_VIRT_WRITE on both GPUs",
  "driver": "615.71.09",
  "scheduler": {
    "num_running_reqs": 2,
    "anchor_computed_tokens": 174807,
    "anchor_output_tokens": 10,
    "fresh_prompt_tokens": 31816,
    "decode_tokens": 1,
    "prefill_tokens": 2047,
    "kv_cache_usage_fraction": 0.14960629921259838,
    "speculation_tokens": 0,
    "multimodal_features": 0
  },
  "engine_request_ids": {
    "anchor": "chatcmpl-aa76274bced356ef-be83474f",
    "contender": "chatcmpl-9f4e530b545624ca-abba75e2"
  },
  "binding": "Isolated direct endpoint with only two synthetic requests; timing, role and token lengths match owner scheduler. First runner revision did not retain SSE chunk IDs; owner IDs are correlated separately, not backfilled into the native artifact.",
  "stack": [
    "sparse_attn_indexer_kpool",
    "_merge_kpool_dcp_topk",
    "_merge_b12x_dcp_topk",
    "triton_gather_topk_ids_by_position"
  ],
  "cause_limit": "Asynchronous CUDA stack is an implicated path, not proven first invalid operation. Driver upgrade did not prevent this reproduction.",
  "control": "baseline-175k-serial.json passed",
  "evidence": [
    {
      "path": "baseline-175k-overlap.json",
      "sha256": "a665db5408023854620539adb0e9497ce3ab83937cf6e95609bb36d46cec269d",
      "bytes": 5819
    },
    {
      "path": "crash-175k-overlap-model-combined.log",
      "sha256": "42e70eb02f6abe6a6a0041ae718065d27856fb8a78f87a688e0b920cad9dc40e",
      "bytes": 116092
    },
    {
      "path": "crash-175k-overlap-kernel.log",
      "sha256": "be1ccb9b49ae15c559a902f1dfc55c5ef1de486cf47d42b0eb7ff1adcd7d38dd",
      "bytes": 460
    },
    {
      "path": "crash-175k-overlap-status.json",
      "sha256": "1273bf621fbce81cda493d65102e80c958164dbd16a765f38905f85386b5ae03",
      "bytes": 1495
    }
  ]
}