Failed to parse rules expression. object contains multiple fields – How to solve this Elasticsearch error

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 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. object contains multiple fields ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the 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 which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

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)

Run the Check-Up to get customized recommendations like this:

checklist Run Check-Up

error

Heavy merges detected in specific nodes

error-img

Description

A large number of small shards can slow down searches and cause cluster instability. Some indices have shards that are too small…

error-img

Recommendations Based on your specific ES deployment you should…

Based on your specific ES deployment you should…

1

X-PUT curl -H [a customized recommendation]

 

Optimize Elasticsearch Performance

Try The Tool