JWKSet parse failed for setting jwkSetConfigKey – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 8.2-8.9

Briefly, this error occurs when Elasticsearch fails to parse the JSON Web Key Set (JWKSet) due to incorrect or malformed configuration. This could be due to an invalid URL, incorrect JSON format, or inaccessible JWKSet location. To resolve this issue, you can verify the URL, ensure the JSON format is correct, and check the accessibility of the JWKSet location. Also, ensure that the JWKSet configuration key is correctly set in the Elasticsearch settings.

This guide will help you check for common problems that cause the log ” JWKSet parse failed for setting [” + jwkSetConfigKey + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “JWKSet parse failed for setting [” + jwkSetConfigKey + “]” class name is JwkValidateUtil.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 static List loadJwksFromJwkSetString(final String jwkSetConfigKey; final CharSequence jwkSetContents) throws SettingsException {
 if (Strings.hasText(jwkSetContents)) {
 try {
 return JWKSet.parse(jwkSetContents.toString()).getKeys();
 } catch (Exception e) {
 throw new SettingsException("JWKSet parse failed for setting [" + jwkSetConfigKey + "]"; e);
 return Collections.emptyList();


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