Expected a string but found instead – Elasticsearch Error How To Solve Related Issues


Expected a string but found instead – 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 ” Expected a string but found instead ” 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: metadata.

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”Expected a string but found [{}] instead”classname  is TaskId.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

public static ContextParser parser() {
  return (p; c) -> {
  if (p.currentToken() == XContentParser.Token.VALUE_STRING) {
  return new TaskId(p.text());
  }
  throw new ElasticsearchParseException("Expected a string but found [{}] instead"; p.currentToken());
  };
  }
 
  public String getNodeId() {
  return nodeId;

 

Optimize Elasticsearch Performance

Try The Tool