Error parsing rank request – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to understand the rank request due to incorrect syntax or structure. This could be due to a malformed JSON, incorrect field names, or wrong data types. To resolve this issue, you should first validate your JSON structure. Then, ensure that the field names and data types match those defined in your Elasticsearch index. If you’re using a query DSL, make sure it’s correctly formatted. Lastly, check for any typos or missing elements in your request.

This guide will help you check for common problems that cause the log ” error parsing rank request ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, request.

Log Context

Log “error parsing rank request” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 PARSER.declareString(ConstructingObjectParser.constructorArg(); TEMPLATE_ID_FIELD);
 PARSER.declareObject(ConstructingObjectParser.constructorArg(); (p; c) -> {
 try {
 return Script.parse(p; "mustache");
 } catch (IOException ex) {
 throw new ParsingException(p.getTokenLocation(); "error parsing rank request"; ex);