Field currentPath must be an object – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.13-7.15

Briefly, this error occurs when Elasticsearch expects a JSON object for a specific field, but it receives a different data type. This usually happens when the data structure of the document being indexed doesn’t match the mapping defined in Elasticsearch. To resolve this issue, you can either modify the document to match the existing mapping or update the mapping to accommodate the new document structure. Also, ensure that nested fields are properly formatted as objects in your JSON document.

This guide will help you check for common problems that cause the log ” Field [” + currentPath + “] must be an object; ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Field [” + currentPath + “] must be an object; ” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else {
 final Mapper fieldMapper = dynamic.getDynamicFieldsBuilder().createDynamicObjectMapper(context; name);
 if (fieldMapper instanceof ObjectMapper == false) {
 assert context.sourceToParse().dynamicTemplates().containsKey(currentPath) :
 "dynamic templates [" + context.sourceToParse().dynamicTemplates() + "]";
 throw new MapperParsingException("Field [" + currentPath + "] must be an object; " +
 "but it's configured as [" + fieldMapper.typeName() + "] in dynamic template [" +
 context.sourceToParse().dynamicTemplates().get(currentPath) + "]");
 mapper = (ObjectMapper) fieldMapper;
 if (mapper.isNested()) {


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?