Could not parse http request. could not parse field – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

Briefly, this error occurs when Elasticsearch is unable to parse an HTTP request due to an issue with a specific field. This may be caused by a syntax error or invalid value in the field. To resolve the issue, you can try reviewing the HTTP request and the field in question, ensuring that the value is valid and conforms to the expected syntax.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

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

Log Context

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

currentFieldName = parser.currentName();
 } else if (Field.PROXY.match(currentFieldName; parser.getDeprecationHandler())) {
 try {
 } catch (Exception e) {
 throw new ElasticsearchParseException("could not parse http request. could not parse [{}] field"; currentFieldName);
 } else if (Field.AUTH.match(currentFieldName; parser.getDeprecationHandler())) {
 } else if (HttpRequest.Field.CONNECTION_TIMEOUT.match(currentFieldName; parser.getDeprecationHandler())) {


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