Failed to parse licenses expected field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch fails to parse the license information due to incorrect or missing fields in the license file. This could be due to a corrupted license file or an incorrect license format. To resolve this issue, you can try the following: 1) Verify the license file’s integrity and ensure it’s not corrupted. 2) Check the license file’s format and ensure it matches the expected format. 3) If the problem persists, consider obtaining a new license file from the provider.

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This guide will help you check for common problems that cause the log ” failed to parse licenses expected field ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, license.

Log Context

Log “failed to parse licenses expected field” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else if (Fields.LICENSE.equals(currentFieldName)) {
 license = License.fromXContent(parser);
 // Ignore all other fields - might be created with new version
 } else {
 throw new ElasticsearchParseException("failed to parse licenses expected field");
 } else {
 throw new ElasticsearchParseException("failed to parse licenses expected start object");
 return license;


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