Char cannot be used for escaping – How to solve this Elasticsearch error

Average Read Time

2 Mins

Char cannot be used for escaping – 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 ” Char cannot be used for escaping ” 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”Char [{}] cannot be used for escaping”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

throw new ParsingException(source(escapeCtx); "A character not a string required for escaping; found [{}]"; escapeString);
  } else if (escapeString.length() == 1) {
  escape = escapeString.charAt(0);
  // these chars already have a meaning
  if (escape == '*' || escape == '%' || escape == '_') {
  throw new ParsingException(source(escapeCtx.escape); "Char [{}] cannot be used for escaping"; escape);
  // lastly validate that escape chars (if present) are followed by special chars
  for (int i = 0; i 


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

Analyze your cluster