Could not read search request. unknown value – 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 Check-Up which can resolve issues that cause many errors.

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

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “could not read search request. unknown value [“classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

case "none":
 expandOpen = false;
 expandClosed = false;
 throw new ElasticsearchParseException("could not read search request. unknown value [" +
 parser.text() + "] for [" + currentFieldName + "] field ");
 } else if (IGNORE_UNAVAILABLE_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
 ignoreUnavailable = parser.booleanValue();
 } else if (ALLOW_NO_INDICES_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {


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