Char cannot be used for escaping – Elasticsearch Error How To Solve Related Issues



Char cannot be used for escaping – Elasticsearch Error How To Solve Related Issues

Updated: July-20

Elasticsearch 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 causing 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, 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 discover the cause of many errors and provides suitable actionable recommendations (free tool that requires no installation). 

Log Context

Log”Char [{}] cannot be used for escaping”classname  is ExpressionBuilder.java
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 

 

Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 What are invalid characters in XML -views 615,049 ,score 228

How do I escape characters in GitHub code search? -views   21,627,score 100

 

 

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