Error encrypting data – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch fails to encrypt data due to issues like incorrect encryption settings, invalid encryption keys, or software bugs. To resolve this, you can check and correct your encryption settings, regenerate or replace invalid encryption keys, or update Elasticsearch to the latest version to fix any potential software bugs. Also, ensure that the user running Elasticsearch has the necessary permissions to access the encryption keys.

This guide will help you check for common problems that cause the log ” error encrypting data ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “error encrypting data” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 byte[] output = new byte[iv.length + encrypted.length];
 System.arraycopy(iv; 0; output; 0; iv.length);
 System.arraycopy(encrypted; 0; output; iv.length; encrypted.length);
 return output;
 } catch (BadPaddingException | IllegalBlockSizeException e) {
 throw new ElasticsearchException("error encrypting data"; e);
 }  private byte[] decryptInternal(byte[] bytes; SecretKey key) {
 if (bytes.length < ivLength) {


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