Could not parse http response unknown numeric field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch encounters a numeric field in the HTTP response that it doesn’t recognize or understand. This could be due to a mismatch in the data type or an unexpected field in the response. To resolve this issue, you can: 1) Check the data type of the field in your index mapping and ensure it matches with the data you’re sending. 2) Review the HTTP response to identify any unexpected fields and adjust your request or response handling accordingly. 3) Update your Elasticsearch version if it’s outdated, as newer versions have better error handling.

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

Log Context

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

 throw new ElasticsearchParseException("could not parse http response. expected a field name but found [{}] instead"; token);
 } else if (token == XContentParser.Token.VALUE_NUMBER) {
 if (Field.STATUS.match(currentFieldName; parser.getDeprecationHandler())) {
 status = parser.intValue();
 } else {
 throw new ElasticsearchParseException("could not parse http response. unknown numeric field [{}]"; currentFieldName);
 } else if (token == XContentParser.Token.VALUE_STRING) {
 if (Field.BODY.match(currentFieldName; parser.getDeprecationHandler())) {
 body = parser.text();
 } else {


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