Cannot cast value of type to parameter type – Elasticsearch Error How To Solve Related Issues


Cannot cast value of type to parameter type – Elasticsearch Error How To Solve Related Issues

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 ” Cannot cast value of type to parameter type ” 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 and plugin.

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”Cannot cast value [{}] of type [{}] to parameter type [{}]”classname  is ExpressionBuilder.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

return new Literal(source; param.value; dataType);
  }
  // otherwise we need to make sure that xcontent-serialized value is converted to the correct type
  try {
  if (canConvert(sourceType; dataType) == false) {
  throw new ParsingException(source; "Cannot cast value [{}] of type [{}] to parameter type [{}]"; param.value; sourceType;
  dataType);
  }
  return new Literal(source; converterFor(sourceType; dataType).convert(param.value); dataType);
  } catch (QlIllegalArgumentException ex) {
  throw new ParsingException(ex; source; "Unexpected actual parameter type [{}] for type [{}]"; sourceType; param.type);

 

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