Could not parse action /. unknown action 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 analyzes 2 JSON files to detect many configuration errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

Take a self-guided product tour to see for yourself (no registration required).

This guide will help you check for common problems that cause the log ” could not parse action /. unknown action type ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “could not parse action [{}/{}]. unknown action type [{}]”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

maxIterations = parser.intValue();
 } else {
 // it's the type of the action
 ActionFactory actionFactory = actionRegistry.factory(currentFieldName);
 if (actionFactory == null) {
 throw new ElasticsearchParseException("could not parse action [{}/{}]. unknown action type [{}]"; watchId;
 actionId; currentFieldName);
 action = actionFactory.parseExecutable(watchId; actionId; parser);


Watch product tour

Try AutoOps to find & fix Elasticsearch problems

Analyze Your Cluster
Skip to content