{"record":{"id":"507e489916af3d7e","repo":"commaai/openpilot","slug":"error-getting-events-for-segment-self-name","errorCode":null,"errorMessage":"error getting events for segment {self._name}","messagePattern":"error getting events for segment (.+?)","errorType":"exception","errorClass":"APIError","httpStatus":null,"severity":"warning","filePath":"openpilot/tools/lib/route.py","lineNumber":202,"sourceCode":"  def _get_route_metadata(route_name: str):\n    api = CommaApi(get_token())\n    return api.get(f'v1/route/{route_name}')\n\n  @property\n  def url(self):\n    route_name = self._name.route_name.canonical_name\n    metadata = self._get_route_metadata(route_name)\n    return f'{metadata[\"url\"]}/{self._name.segment_num}'\n\n  @property\n  def events(self):\n    if not self._events:\n      try:\n        resp = requests.get(f'{self.url}/events.json')\n        resp.raise_for_status()\n        self._events = resp.json()\n      except Exception as e:\n        raise APIError(f'error getting events for segment {self._name}') from e\n    return self._events\n\n\nclass RouteName:\n  def __init__(self, name_str: str):\n    self._name_str = name_str\n    delim = next(c for c in self._name_str if c in (\"|\", \"/\"))\n    self._dongle_id, self._time_str = self._name_str.split(delim)\n\n    assert len(self._dongle_id) == 16, self._name_str\n    assert len(self._time_str) == 20, self._name_str\n    self._canonical_name = f\"{self._dongle_id}|{self._time_str}\"\n\n  @property\n  def canonical_name(self) -> str: return self._canonical_name\n\n  @property\n  def dongle_id(self) -> str: return self._dongle_id","sourceCodeStart":184,"sourceCodeEnd":220,"githubUrl":"https://github.com/commaai/openpilot/blob/516ec1e68203439a73f340f1d0b3b91eabc626ee/openpilot/tools/lib/route.py#L184-L220","documentation":"Segment.events fetches {segment_url}/events.json over HTTP; any failure (non-2xx status, network error, bad JSON) is wrapped in APIError. events.json is an optional per-segment artifact on openpilot's data backend, so 404s are the most common cause.","triggerScenarios":"Accessing segment.events for old or non-user routes where events.json was never generated; the backend URL from route metadata is stale; offline runs.","commonSituations":"Older routes predating events.json; network/VPN issues; hitting the API without credentials for a private route.","solutions":["Treat events as optional: wrap access in try/except APIError and default to an empty list","Check the URL manually with curl to distinguish 404 (no events) from 401/timeout","For offline analysis, skip .events entirely — it is enrichment data, not core log data"],"exampleFix":"# before\nevents = seg.events\n\n# after\nfrom openpilot.tools.lib.route import APIError\ntry:\n    events = seg.events\nexcept APIError:\n    events = []  # events.json is optional metadata","handlingStrategy":"try-catch","validationCode":"import requests\n\ndef has_events(segment_url: str) -> bool:\n    try:\n        return requests.head(f'{segment_url}/events.json', timeout=10).status_code == 200\n    except requests.RequestException:\n        return False","typeGuard":null,"tryCatchPattern":"from openpilot.tools.lib.route import APIError\ntry:\n    events = seg.events\nexcept APIError:\n    events = []  # events.json is optional enrichment","preventionTips":["Treat events.json as optional metadata; never let it break a pipeline","Cache fetched events locally for repeated analysis","Expect 404s on old routes predating events generation"],"tags":["network","api","route","optional-data"],"backgroundTag":null,"analyzedSha":"516ec1e68203439a73f340f1d0b3b91eabc626ee","analyzedAt":"2026-08-15T00:17:37.461Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}