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Merge pull request #1353 from himanshug/alerts_doc 

documenting druid alerts schema
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Fangjin Yang 2015-05-09 19:05:32 -07:00
parent eb76889a5a f2adb22350
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layout: doc_page
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# Druid 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`

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* "Including Extensions":./Including-Extensions.html
* "Data Retention":./Rule-Configuration.html
* "Metrics and Monitoring":./Metrics.html
* "Alerts":./alerts.html
* "Updating the Cluster":./Rolling-Updates.html
* "Different Hadoop Versions":./Other-Hadoop.html
* "Performance FAQ":./Performance-FAQ.html