Unknown trigger type – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Unknown trigger type ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Unknown trigger type [{}]”classname  is TriggerService.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 public TriggerEvent parseTriggerEvent(String watchId; String context; String type; XContentParser parser) throws IOException {
 TriggerEngine engine = engines.get(type);
 if (engine == null) {
 throw new ElasticsearchParseException("Unknown trigger type [{}]"; type);
 return engine.parseTriggerEvent(this; watchId; context; parser);
 public long count() {


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