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 createdservice
- the service name that emitted the alerthost
- the host name that emitted the alertseverity
- severity of the alert e.g. anomaly, component-failure, service-failure etc.description
- a description of the alertdata
- if there was an exception then a JSON object with fieldsexceptionType
,exceptionMessage
andexceptionStackTrace
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