Virtuozzo Infrastructure 7.3 Update 1 Hotfix 4 (7.3.1-70)

Issue date: 2026-09-28

Applies to: Virtuozzo Infrastructure 7.3

Virtuozzo Advisory ID: VZA-2026-024

1. Overview

This update provides stability fixes.

2. Bug Fixes

  • Live migration could time out for a VM with a backup NBD backing chain. (VSTOR-103803)

  • S3 requests could fail under concurrent load due to high object lookup latency. (VSTOR-119296)

  • Object uploads could fail with an internal error when quota reservation did not complete. (VSTOR-131188, VSTOR-141142)

  • Unmounting the storage could hang when a storage node became unreachable. (VSTOR-135626, VSTOR-143108)

  • Deleting a large bucket could exhaust memory on the name service. (VSTOR-138675)

  • Journal replay on the backup gateway could enter a livelock without advancing. (VSTOR-140445)

  • The name service could leak memory and repeatedly restart after deleting a bucket. (VSTOR-140847)

  • A kernel stability fix for the storage client after a connection abort. (VSTOR-141615)

  • The backup gateway could crash on a redirecting node with a warm proxy map. (VSTOR-142631)

  • Guest I/O could fail and become read-only after live migration of an online-resized volume. (VSTOR-143591)

3. Installing the Update

You can update Virtuozzo Infrastructure in the SETTINGS > UPDATES section of the admin panel. Placing nodes in the maintenance mode is required to obtain this update.

The source of this advisory is available in the JSON file.