Unknown trigger type – How to solve this Elasticsearch error

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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 Error 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. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: plugin.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

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() {


Run the Check-Up to get a customized report like this:

Analyze your cluster