Could not parse transform for watch failed to parse script – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

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Briefly, this error occurs when Elasticsearch is unable to parse a transform script for a watch. This could be due to incorrect syntax, missing or invalid fields in the script. To resolve this issue, you should first verify the syntax of your script. Make sure all required fields are present and correctly formatted. If the script is complex, try breaking it down into smaller parts and testing each part individually. Also, ensure that the script is compatible with the version of Elasticsearch you are using.

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This guide will help you check for common problems that cause the log ” could not parse [{}] transform for watch [{}]. failed to parse script ” 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 [{}]. failed to parse script” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 public static ScriptTransform parse(String watchId; XContentParser parser) throws IOException {
 try {
 Script script = Script.parse(parser);
 return new ScriptTransform(script);
 } catch (ElasticsearchParseException pe) {
 throw new ElasticsearchParseException("could not parse [{}] transform for watch [{}]. failed to parse script"; pe; TYPE;
 }  public static Builder builder(Script script) {


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