Knowledge Discovery 25.4.0
25.4 Release Notes

# Distributed Index Handler

Distributed Index Handler is an ACI server. For details of changes that affect all ACI servers, see ACI Server Framework.

## 25.4.0

There were no new features or resolved issues in this release.

## 25.3.0

There were no new features or resolved issues in this release.

## 25.2.0

### New Features

- DIH can now read an AES key for data encryption directly from the new `AESKey` configuration parameter in the `[DataEncryption]` section. Previously, it was only possible to read an AES key file from disk (configured with `AESKeyFile`).

  You can use this option to import a key directly from a secret source, such as an environment variable or HashiCorp® Vault. The key protects access to your encrypted data, so OpenText strongly recommends that you do not to supply it as a plain text configuration value. Setting a plain text value returns a configuration validation error, but does not prevent the server from starting up.

### Resolved Issues

There were no resolved issues in this release.

## 25.1.0

There were no new features or resolved issues in this release.

## 24.4.0

There were no new features or resolved issues in this release.

## 24.3.0

### New Features

There were no new features in this release.

### Resolved Issues

- The `DREDELETEREF` index action was truncated after 65536 characters. There is now no character limit for this command.

## 24.2.0

There were no new features or resolved issues in this release.

## 24.1.0

There were no new features or resolved issues in this release.

## 23.4.0

### New Features

There were no new features in this release.

### Resolved Issues

- DIH 23.3 could fail to parse compressed incoming data files in advanced distribution modes when on-disk data encryption was enabled.

## 23.3.0

There were no new features or resolved issues in this release.

## 23.2.0

There were no new features or resolved issues in this release.

Copyright 2025 Open Text
Version 25.4.0 | Last updated October 2025

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Product: Knowledge Discovery 25.4.0

Topic Title: Distributed Index Handler