Could not parse action – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to parse a specific action due to incorrect or malformed syntax in the request. This could be due to a wrong field name, incorrect data type, or a poorly structured JSON body. To resolve this issue, you should first verify the syntax of your request. Ensure that the field names and data types match those defined in your Elasticsearch index. Also, check that your JSON body is correctly structured. If the error persists, consider using a tool to validate your JSON syntax.

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

 password = WatcherXContentParser.secretOrNull(parser);
 } else if (Field.PROFILE.match(currentFieldName; parser.getDeprecationHandler())) {
 try {
 profile = Profile.resolve(parser.text());
 } catch (IllegalArgumentException iae) {
 throw new ElasticsearchParseException("could not parse [{}] action [{}/{}]"; TYPE; watchId; actionId; iae);
 } else {
 throw new ElasticsearchParseException(
 "could not parse [{}] action [{}/{}]. unexpected string field [{}]";