| --- |
| id: alerts |
| title: "Alerts" |
| --- |
| |
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| |
| |
| 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` |
