Setting – How to solve this Elasticsearch error

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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 Error 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. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: plugin.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

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) {


Run the Check-Up to get a customized report like this:

Analyze your cluster