Hi Team, I’m trying to get a solution to monitor sensors that fail (for example when they run the checks to decide which jobs to run). I haven’t found things like

hooks

or

run_failure_sensor

there are for jobs/ops. What is the best Approach for this?

Hey Jose - the query that powers the tick history in Dagit for a particular sensor looks something like this (the naming is a bit odd - "instigation/instigator" includes both schedules and sensors and refers to things that can instigate runs)

instigationStateOrError(instigationSelector: $instigationSelector) {
  __typename
  ... on InstigationState {
    id
    instigationType
    nextTick {
      timestamp
    }
    ticks(dayRange: $dayRange, limit: $limit, cursor: $cursor, statuses: $statuses) {
      id
      status
      timestamp
      cursor
      skipReason
      runIds
      error {
        message
      }
    }
  }
}

the instigation selector has these fields (name is the name of the sensor): https://github.com/dagster-io/dagster/blob/1c5733d4091d56d71ee1fd94f0ce66a42a13b1a[…]python_modules/dagster-graphql/dagster_graphql/schema/inputs.py

Thanks Daniel, so there is no better solution than just having a sensor running that query and checking for errors?

That's what we currently expose, yeah - and because of the nature of what you're monitoring, you may want to use something other than a sensor to run the query?

yeah I get you, was thinking the same, just didn’t want to introduce anything new if I could avoid it

That query can only refer to a specific individual sensor