Unexpected exception retrieving 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 retrieve the Data Encryption Key (DEK) with the given ID. This could be due to a misconfiguration, network issues, or the DEK might not exist. To resolve this, you can check the DEK ID for any errors, ensure the DEK exists, and verify your network connectivity. Also, check your Elasticsearch configuration to ensure it’s correctly set up for encryption. If the problem persists, consider restarting your Elasticsearch cluster, but ensure you have a backup as a precaution.

This guide will help you check for common problems that cause the log ” Unexpected exception retrieving 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 “Unexpected exception retrieving DEK [” + dekId + “]” class name is EncryptedRepository.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (e.getCause() instanceof IOException) {
 throw (IOException) e.getCause();
 } else if (e.getCause() instanceof ElasticsearchException) {
 throw (ElasticsearchException) e.getCause();
 } else {
 throw new RepositoryException(repositoryName; "Unexpected exception retrieving DEK [" + dekId + "]"; e);
 }  private SecretKey loadDEK(String dekId) throws IOException {


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