Mutation Failure: dangerfileFinished

Artsy is running its own Peril installed on Heroku and we noticed that the dangerfileFinished mutation is returning a 400 response in our logs. It appears to be making the API call to itself, and this failure isn't causing problems for us. It appears similar to #307.

I've enabled debug logging for the relevant file:

2020-01-28T16:32:50.152097+00:00 app[web.1]: Tue, 28 Jan 2020 16:32:50 GMT runFromSameHost info: Danger run finished in 5.005s, sending results
2020-01-28T16:32:50.152136+00:00 app[web.1]: 
2020-01-28T16:32:50.152573+00:00 app[web.1]: Tue, 28 Jan 2020 16:32:50 GMT runFromSameHost info: Making GraphQL API request to host https://artsy-peril-api.herokuapp.com, query: {"query":"\n  mutation {\n    dangerfileFinished(\n      jwt: \"A_VALID_JWT\",\n      name: \"pull_request\",\n      dangerfiles: [\"artsy/peril-settings@org/allPRs.ts\", \"artsy/peril-settings@org/jira/pr.ts\", \"artsy/peril-settings@org/ossPRsForbidForks.ts\"],\n      time: 5.005\n      \n    ) {\n      success\n    }\n  }\n"}
2020-01-28T16:32:50.152575+00:00 app[web.1]: 
2020-01-28T16:32:50.156776+00:00 app[web.1]: Tue, 28 Jan 2020 16:32:50 GMT runFromSameHost Found no issues or messages from Danger. Removing any existing messages on GitHub.
2020-01-28T16:32:50.156779+00:00 app[web.1]: 
2020-01-28T16:32:50.184964+00:00 app[web.1]: Tue, 28 Jan 2020 16:32:50 GMT runFromSameHost info: Got GraphQL API result (400) back: {"size":0,"timeout":0}
2020-01-28T16:32:50.184968+00:00 app[web.1]: 
2020-01-28T16:32:50.185488+00:00 app[web.1]: Tue, 28 Jan 2020 16:32:50 GMT runFromSameHost error: Error making an API call to the GraphQL API
2020-01-28T16:32:50.185491+00:00 app[web.1]: 
2020-01-28T16:32:50.185993+00:00 app[web.1]: Tue, 28 Jan 2020 16:32:50 GMT runFromSameHost error: undefined
2020-01-28T16:32:50.185996+00:00 app[web.1]: 
2020-01-28T16:32:50.183453+00:00 heroku[router]: at=info method=POST path="/api/graphql" host=artsy-peril-api.herokuapp.com request_id=bfd056d8-f22d-4741-a3a7-1bc474d0e32b fwd="IP_ADDRESS dyno=web.1 connect=0ms service=4ms status=400 bytes=306 protocol=https

The data section of the decoded JWT is:

  "data": {
    "actions": [
      "scheduleTask",
      "dangerfileFinished"
    ]
  },

Any insight on where to look next would be appreciated 🙇

danger / peril

Mutation Failure: dangerfileFinished #469