Expected the value for to be an object but found instead – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

Briefly, this error occurs when Elasticsearch expects a JSON object but receives a different data type instead. This could be due to incorrect data formatting or a mismatch in the expected data structure. To resolve this, ensure that the data being sent matches the expected JSON object structure. Check your data input and correct any formatting errors. Also, verify your mapping and ensure it aligns with the data you’re trying to index. If the error persists, consider reindexing your data with the correct structure.

This guide will help you check for common problems that cause the log ” expected the value for {} to be an object; but found {} instead ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “expected the value for {} to be an object; but found {} instead” class name is PutPrivilegesRequestBuilder.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 assert token == XContentParser.Token.FIELD_NAME : "Invalid token " + token;
 final String applicationName = parser.currentName();  token = parser.nextToken();
 if (token != XContentParser.Token.START_OBJECT) {
 throw new ElasticsearchParseException("expected the value for {} to be an object; but found {} instead";
 applicationName; token);
 }  while (parser.nextToken() != XContentParser.Token.END_OBJECT) {
 token = parser.currentToken();