ConcreteSetting getKey is malformed value – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.6-8.9

Briefly, this error occurs when a setting in Elasticsearch is not correctly configured. The setting identified by “concreteSetting.getKey()” has received an invalid value, represented by “value”. To resolve this issue, you should first identify the setting that is causing the problem. Then, check the Elasticsearch documentation to understand the correct format or acceptable values for this setting. Correct the value accordingly and restart Elasticsearch. If the problem persists, consider resetting the setting to its default value.

This guide will help you check for common problems that cause the log ” [” + concreteSetting.getKey() + “] is malformed [” + value + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “[” + concreteSetting.getKey() + “] is malformed [” + value + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (Strings.isNullOrEmpty(value) == false) {
 try {
 } catch (RuntimeException e) {
 Setting concreteSetting = HttpExporter.PROXY_BASE_PATH_SETTING.getConcreteSetting(key);
 throw new SettingsException("[" + concreteSetting.getKey() + "] is malformed [" + value + "]"; e);
 }; Property.Dynamic; Property.NodeScope; Property.DeprecatedWarning);


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