38 lines
1.5 KiB
Markdown
38 lines
1.5 KiB
Markdown
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---
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id: alerts
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title: "Alerts"
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---
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<!--
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~ Licensed to the Apache Software Foundation (ASF) under one
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~ or more contributor license agreements. See the NOTICE file
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~ distributed with this work for additional information
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~ regarding copyright ownership. The ASF licenses this file
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~ to you under the Apache License, Version 2.0 (the
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~ "License"); you may not use this file except in compliance
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~ with the License. You may obtain a copy of the License at
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~
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~ http://www.apache.org/licenses/LICENSE-2.0
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~
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~ Unless required by applicable law or agreed to in writing,
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~ software distributed under the License is distributed on an
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~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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~ KIND, either express or implied. See the License for the
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~ specific language governing permissions and limitations
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~ under the License.
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-->
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Druid generates alerts on getting into unexpected situations.
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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.
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All Druid alerts share a common set of fields:
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* `timestamp` - the time the alert was created
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* `service` - the service name that emitted the alert
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* `host` - the host name that emitted the alert
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* `severity` - severity of the alert e.g. anomaly, component-failure, service-failure etc.
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* `description` - a description of the alert
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* `data` - if there was an exception then a JSON object with fields `exceptionType`, `exceptionMessage` and `exceptionStackTrace`
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