Unknown key for a ” + token + ” in ” + currentFieldName + “. – How to solve this Elasticsearch error

Unknown key for a ” + token + ” in ” + currentFieldName + “. – 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 ” Unknown key for a ” + token + ” in ” + currentFieldName + “. ” 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.

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”Unknown key for a ” + token + ” in [” + currentFieldName + “].”classname  is FetchSourceContext.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 [" + currentFieldName + "]."; parser.getTokenLocation());
  }
  } else {
  throw new ParsingException(parser.getTokenLocation(); "Unknown key for a " + token + " in [" + currentFieldName + "].";
  parser.getTokenLocation());
  }
  }
  } else {
  throw new ParsingException(parser.getTokenLocation(); "Expected one of [" + XContentParser.Token.VALUE_BOOLEAN + "; "

 

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

Analyze your cluster