Unknown function – Elasticsearch Error How To Solve Related Issues

Unknown function – 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 ” Unknown function ” 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”Unknown function [{}]”classname  is ExpressionBuilder.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

case SqlBaseLexer.CURRENT_DATE:
  return new UnresolvedFunction(source; functionName; ResolutionType.STANDARD; emptyList());
  case SqlBaseLexer.CURRENT_TIME:
  return new UnresolvedFunction(source; functionName; ResolutionType.STANDARD; emptyList());
  default:
  throw new ParsingException(source; "Unknown function [{}]"; functionName);
  }
  }
 
  @Override
  public Function visitFunctionExpression(FunctionExpressionContext ctx) {

 

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