Setting – 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 ” Setting ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: 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 “Setting [“classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

} else if (claimValueObject instanceof String) {
 values = List.of((String) claimValueObject);
 } else if (claimValueObject instanceof List) {
 values = (List) claimValueObject;
 } else {
 throw new SettingsException("Setting [" + RealmSettings.getFullSettingKey(realmConfig; setting.getClaim())
 + " expects a claim with String or a String Array value but found a "
 + claimValueObject.getClass().getName());
 return -> {
 if (s == null) {


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