{"abstract":"Spans export without a service identity.","category":"Observability","checks":8,"contract":"Export ended sampled spans that are not locally suppressed, have valid parent linkage when a parent is required, and carry the required service identity. Root spans need no parent.","evaluation_group":"xt-trace-export","failed_approach":"The attempted repair substitutes span['service'] is not None. Fixture 7 still yields True instead of False.","family":"xt-trace-export-service-identity","id":"FA-10376","implementations":{"attempt":{"sha256":"2c565aa9f33b9f925e52a113f7d27d6a15b2098049edca5eb5e8cc2c65bb560c","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(span):\n    return span['ended'] and span['sampled'] and not span['suppressed'] and (span['root'] or span['parent'] is not None) and span['service'] is not None\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': True, 'parent': None, 'service': 'api'}), True)\ncheck('fixture 2', solve({'ended': False, 'sampled': True, 'suppressed': False, 'root': True, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 3', solve({'ended': True, 'sampled': False, 'suppressed': False, 'root': True, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 4', solve({'ended': True, 'sampled': True, 'suppressed': True, 'root': True, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 5', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': False, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 6', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': False, 'parent': 'p', 'service': 'api'}), True)\ncheck('fixture 7', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': True, 'parent': None, 'service': ''}), False)\ncheck('fixture 8', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': False, 'parent': '', 'service': 'api'}), True)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"02664f9e2abde36e74ee70738e0d6308926189215904663b674516f7a53db2c1","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(span):\n    return span['ended'] and span['sampled'] and not span['suppressed'] and (span['root'] or span['parent'] is not None) and True\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': True, 'parent': None, 'service': 'api'}), True)\ncheck('fixture 2', solve({'ended': False, 'sampled': True, 'suppressed': False, 'root': True, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 3', solve({'ended': True, 'sampled': False, 'suppressed': False, 'root': True, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 4', solve({'ended': True, 'sampled': True, 'suppressed': True, 'root': True, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 5', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': False, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 6', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': False, 'parent': 'p', 'service': 'api'}), True)\ncheck('fixture 7', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': True, 'parent': None, 'service': ''}), False)\ncheck('fixture 8', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': False, 'parent': '', 'service': 'api'}), True)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"fixed":{"sha256":"c9b027824267f8e56176f86b625af6a6ba5bc7c45d30748372cfa35d2c70e306","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(span):\n    return span['ended'] and span['sampled'] and not span['suppressed'] and (span['root'] or span['parent'] is not None) and bool(span['service'])\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': True, 'parent': None, 'service': 'api'}), True)\ncheck('fixture 2', solve({'ended': False, 'sampled': True, 'suppressed': False, 'root': True, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 3', solve({'ended': True, 'sampled': False, 'suppressed': False, 'root': True, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 4', solve({'ended': True, 'sampled': True, 'suppressed': True, 'root': True, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 5', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': False, 'parent': None, 'service': 'api'}), False)\ncheck('fixture 6', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': False, 'parent': 'p', 'service': 'api'}), True)\ncheck('fixture 7', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': True, 'parent': None, 'service': ''}), False)\ncheck('fixture 8', solve({'ended': True, 'sampled': True, 'suppressed': False, 'root': False, 'parent': '', 'service': 'api'}), True)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":" This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"xt-trace-export-service-identity","generated_at":"2026-09-29T14:38:38.469618+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"An offline model of trace export admission, suitable for testing build and release tooling without external services.","repair":"Require a nonempty service identity.","root_cause":"The implementation substitutes True for bool(span['service']), so spans export without a service identity.","sha256":"d83dfa9c123591bddf95c80455ca72cc4b77870f784017a3dac62dad3bb49408","title":"Trace export admission: Spans export without a service identity · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":38.583,"exit_code":1,"observations":[{"actual":true,"check":"fixture 1","expected":true,"passed":true},{"actual":false,"check":"fixture 2","expected":false,"passed":true},{"actual":false,"check":"fixture 3","expected":false,"passed":true},{"actual":false,"check":"fixture 4","expected":false,"passed":true},{"actual":false,"check":"fixture 5","expected":false,"passed":true},{"actual":true,"check":"fixture 6","expected":true,"passed":true},{"actual":true,"check":"fixture 7","expected":false,"passed":false},{"actual":true,"check":"fixture 8","expected":true,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 6\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": true, \"expected\": false, \"passed\": false}, {\"check\": \"fixture 8\", \"actual\": true, \"expected\": true, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":37.924,"exit_code":1,"observations":[{"actual":true,"check":"fixture 1","expected":true,"passed":true},{"actual":false,"check":"fixture 2","expected":false,"passed":true},{"actual":false,"check":"fixture 3","expected":false,"passed":true},{"actual":false,"check":"fixture 4","expected":false,"passed":true},{"actual":false,"check":"fixture 5","expected":false,"passed":true},{"actual":true,"check":"fixture 6","expected":true,"passed":true},{"actual":true,"check":"fixture 7","expected":false,"passed":false},{"actual":true,"check":"fixture 8","expected":true,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 6\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": true, \"expected\": false, \"passed\": false}, {\"check\": \"fixture 8\", \"actual\": true, \"expected\": true, \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":39.862,"exit_code":0,"observations":[{"actual":true,"check":"fixture 1","expected":true,"passed":true},{"actual":false,"check":"fixture 2","expected":false,"passed":true},{"actual":false,"check":"fixture 3","expected":false,"passed":true},{"actual":false,"check":"fixture 4","expected":false,"passed":true},{"actual":false,"check":"fixture 5","expected":false,"passed":true},{"actual":true,"check":"fixture 6","expected":true,"passed":true},{"actual":false,"check":"fixture 7","expected":false,"passed":true},{"actual":true,"check":"fixture 8","expected":true,"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 6\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"fixture 8\", \"actual\": true, \"expected\": true, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}