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druid/docs/operations/alerts.md
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id title
alerts Alerts

Druid generates alerts on getting into unexpected situations.

Alerts are emitted as JSON objects to a runtime log file or over HTTP (to a service such as Apache Kafka). Alert emission is disabled by default.

All Druid alerts share a common set of fields:

  • timestamp - the time the alert was created
  • service - the service name that emitted the alert
  • host - the host name that emitted the alert
  • severity - severity of the alert e.g. anomaly, component-failure, service-failure etc.
  • description - a description of the alert
  • data - if there was an exception then a JSON object with fields exceptionType, exceptionMessage and exceptionStackTrace