Meta must be an object; got – Elasticsearch Error How To Solve Related Issues

Meta must be an object; got – 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 “meta must be an object; got” 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 discover the cause of many errors and provides suitable actionable recommendations (free tool that requires no installation). 

Log Context

Log”[meta] must be an object; got”classname  is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

if (metaObject == null) {
  // no meta
  if (metaObject instanceof Map == false) {
  throw new MapperParsingException("[meta] must be an object; got " + metaObject.getClass().getSimpleName() +
  "[" + metaObject + "] for field [" + name +"]");
  Map meta = (Map) metaObject;
  if (meta.size() > 5) {

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 elasticsearch bool query combine must with OR -views 133,675 ,score 181

How to get an Elasticsearch aggregation with multiple fields -views   33,822,score 38

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