Failed to parse licenses expected an array of licenses – 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 ” failed to parse licenses expected an array of licenses ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin and license.

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 “failed to parse licenses expected an array of licenses”classname  is License.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

}
 if (license == null && !pre20Licenses.isEmpty()) {
 license = pre20Licenses.get(0);
 }
 } else {
 throw new ElasticsearchParseException("failed to parse licenses expected an array of licenses");
 }
 } else if (Fields.LICENSE.equals(currentFieldName)) {
 license = License.fromXContent(parser);
 }
 // Ignore all other fields - might be created with new version

 

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