Failed to parse rules expression. field is not recognised in object – How to solve this Elasticsearch error

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Failed to parse rules expression. field is not recognised in object – 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 Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” failed to parse rules expression. field is not recognised in object ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: parser, rest-high-level and client.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “failed to parse rules expression. field [{}] is not recognised in object [{}]”classname  is RoleMapperExpressionParser.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

} else if (FIELD.match(field; parser.getDeprecationHandler())) {
 return parseFieldExpression(parser);
 } else if (CompositeType.EXCEPT.getParseField().match(field; parser.getDeprecationHandler())) {
 return parseExceptExpression(parser);
 } else {
 throw new ElasticsearchParseException("failed to parse rules expression. field [{}] is not recognised in object [{}]"; field;
 objectName);
 }
 } 
 private RoleMapperExpression parseFieldExpression(XContentParser parser) throws IOException {

 

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