Could not parse http request unexpected object field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

Briefly, this error occurs when Elasticsearch receives an HTTP request that it cannot parse due to an unexpected object field. This is usually due to a malformed request, such as incorrect JSON formatting or an invalid field. To resolve this issue, you should first check the syntax of your request. Ensure that the JSON is correctly formatted and all fields are valid. If the error persists, try to isolate the problematic part of the request by removing fields one by one until the request is successful. This will help identify the field causing the issue.

This guide will help you check for common problems that cause the log ” could not parse http request. unexpected object field [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, request.

Log Context

Log “could not parse http request. unexpected object field [{}]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else if (Field.PARAMS.match(currentFieldName; parser.getDeprecationHandler())) {
 } else if (Field.BODY.match(currentFieldName; parser.getDeprecationHandler())) {
 } else {
 throw new ElasticsearchParseException("could not parse http request. unexpected object field [{}]";
 } else if (token == XContentParser.Token.VALUE_STRING) {
 if (Field.SCHEME.match(currentFieldName; parser.getDeprecationHandler())) {