Wrapped DEK dekId is larger than expected – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.12-8.6

Briefly, this error occurs when the Data Encryption Key (DEK) in Elasticsearch is larger than the expected size. This could be due to a configuration issue or a problem with the encryption process. To resolve this issue, you can try the following: 1) Check and correct the DEK configuration settings; 2) Verify the encryption process and ensure it’s working correctly; 3) If the problem persists, consider regenerating a new DEK and replacing the old one.

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

Log Context

Log “Wrapped DEK [” + dekId + “] is larger than expected” class name is EncryptedRepository.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 "Wrapped DEK [" + dekId + "] has smaller length [" + bytesRead + "] than expected"
 if (encryptedDEKInputStream.read() != -1) {
 throw new RepositoryException(repositoryName; "Wrapped DEK [" + dekId + "] is larger than expected");
 } catch (NoSuchFileException e) {
 // do NOT throw IOException when the DEK does not exist; as this is a decryption problem; and IOExceptions
 // can move the repository in the corrupted state
 throw new ElasticsearchException(


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