Could not parse transform for watch . expected a transform object; but – 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.

This guide will help you check for common problems that cause the log ” could not parse transform for watch . expected a transform object; but ” 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 [{}] transform for watch [{}]. expected a transform object; but”classname  is ChainTransform.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

List transforms = new ArrayList<>(); 
 String currentFieldName = null;
 while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
 if (token != XContentParser.Token.START_OBJECT) {
 throw new ElasticsearchParseException("could not parse [{}] transform for watch [{}]. expected a transform object; but " +
 "found [{}] instead"; TYPE; watchId; token);
 }
 while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
 if (token == XContentParser.Token.FIELD_NAME) {
 currentFieldName = parser.currentName();

 

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