Malformed content; must start with an object – Elasticsearch Error How To Solve Related Issues


Malformed content; must start with an object – 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 ” Malformed content; must start with an object ” 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: index.

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”Malformed content; must start with an object”classname  is DocumentParser.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

private static void validateStart(XContentParser parser) throws IOException {
  // will result in START_OBJECT
  XContentParser.Token token = parser.nextToken();
  if (token != XContentParser.Token.START_OBJECT) {
  throw new MapperParsingException("Malformed content; must start with an object");
  }
  }
 
  private static void validateEnd(XContentParser parser) throws IOException {
  XContentParser.Token token;// only check for end of tokens if we created the parser here

 

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