Failed to parse rules expression. object contains multiple fields – 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 ” failed to parse rules expression. object contains multiple fields ” 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.


Log Context

Log “failed to parse rules expression. object [{}] contains multiple fields”classname  is RoleMapperExpressionParser.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

} 
 final String fieldName = fieldName(objectName; parser);
 final RoleMapperExpression expr = parseExpression(parser; fieldName; objectName);
 if (parser.nextToken() != XContentParser.Token.END_OBJECT) {
 throw new ElasticsearchParseException("failed to parse rules expression. object [{}] contains multiple fields"; objectName);
 }
 return expr;
 } 
 private RoleMapperExpression parseExpression(XContentParser parser; String field; String objectName)

 

See how you can use AutoOps to resolve issues


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