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

Opster Team

August-23, Version: 6.8-7.15

Briefly, this error occurs when Elasticsearch is unable to parse the transform for a watch due to incorrect or invalid syntax in the JSON object. This could be due to missing or extra commas, brackets, or quotes. To resolve this issue, you should carefully review and correct the JSON syntax in your watch definition. You can use a JSON validator tool to check for syntax errors. Additionally, ensure that the fields and data types in the transform match those in your Elasticsearch index.

This guide will help you check for common problems that cause the log ” could not parse [{}] transform for watch [{}]. failed to parse [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, search.

Log Context

Log “could not parse [{}] transform for watch [{}]. failed to parse [{}]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 currentFieldName = parser.currentName();
 } else if (Field.REQUEST.match(currentFieldName; parser.getDeprecationHandler())) {
 try {
 request = WatcherSearchTemplateRequest.fromXContent(parser; ExecutableSearchTransform.DEFAULT_SEARCH_TYPE);
 } catch (ElasticsearchParseException srpe) {
 throw new ElasticsearchParseException("could not parse [{}] transform for watch [{}]. failed to parse [{}]"; srpe;
 TYPE; watchId; currentFieldName);
 } else if (Field.TIMEOUT.match(currentFieldName; parser.getDeprecationHandler())) {
 timeout = timeValueMillis(parser.longValue());
 } else if (Field.TIMEOUT_HUMAN.match(currentFieldName; parser.getDeprecationHandler())) {


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