Unexpected token ” + token + ” in ” + aggregationName + “. – How to solve this Elasticsearch error

Unexpected token ” + token + ” in ” + aggregationName + “. – 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 ” Unexpected token ” + token + ” in ” + aggregationName + “. ” 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: search and aggregations.

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”Unexpected token ” + token + ” in [” + aggregationName + “].”classname  is ReverseNestedAggregationBuilder.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

} else {
  throw new ParsingException(parser.getTokenLocation();
  "Unknown key for a " + token + " in [" + aggregationName + "]: [" + currentFieldName + "].");
  }
  } else {
  throw new ParsingException(parser.getTokenLocation(); "Unexpected token " + token + " in [" + aggregationName + "].");
  }
  }
 
  ReverseNestedAggregationBuilder factory = new ReverseNestedAggregationBuilder(
  aggregationName);

 

Run the Check-Up to get a customized report like this:

Analyze your cluster