Failure to AES wrap the DEK dekId – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.12-8.6

Briefly, this error occurs when Elasticsearch fails to wrap the Data Encryption Key (DEK) with the Advanced Encryption Standard (AES). This could be due to incorrect configuration, insufficient permissions, or issues with the encryption library. To resolve this, ensure that the encryption settings are correctly configured, the user has the necessary permissions, and the encryption library is up-to-date and functioning properly. If the problem persists, consider regenerating the DEK or troubleshooting the AES encryption process.

This guide will help you check for common problems that cause the log ” Failure to AES wrap the DEK [” + dekId + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: repositories, plugin.

Log Context

Log “Failure to AES wrap the DEK [” + dekId + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } catch (GeneralSecurityException e) {
 // throw unchecked ElasticsearchException; IOExceptions are interpreted differently and can move the repository in the
 // corrupted state
 throw new RepositoryException(repositoryName; "Failure to AES wrap the DEK [" + dekId + "]"; e);
 logger.trace("Repository [{}] successfully wrapped DEK [{}]"; repositoryName; dekId);
 dekBlobContainer.writeBlobAtomic(kek.v1(); new BytesArray(encryptedDEKBytes); true);
 logger.debug("Repository [{}] successfully stored DEK [{}] under path {} {}"; repositoryName; dekId; dekBlobPath; kek.v1());


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