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Release Notes for HPC Pack 2019 Update 2

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These release notes address late-breaking issues and information for the high-performance computing (HPC) cluster administrator about Microsoft HPC Pack 2019 Update 2.

Download and install Microsoft HPC Pack 2019 Update 2

Microsoft HPC Pack 2019 Update 2 is available for download (Cluster Install & Client Utilities) from the Microsoft Download Center. After the download, please save the installation files to your local machine (or machines) that will be set up as a cluster head node.

Known issues

Important

All HPC Pack 2016 and 2019 Update 2 and earlier clusters, including Windows-only clusters, must refer to Manage Linux authentication key for HPC Pack to set a Linux authentication key to address the critical vulnerability CVE-2025-21198.

  • Windows Server 2022 is supported for head node role with .Net Framework 4.8 cumulative update August 9, 2022-KB5015733 or later applied to all cluster nodes and clients that are on Windows Server 2022. If the updates are not available, you may need to disable TLS 1.3 on Windows Server 2022 before installing the head node as a workaround.
  • Upgrading could be stuck if certian HPC service e.g. HpcBroker is in Pausing or Stopping state. Just stop the corresponding process e.g. HpcBroker.exe to proceed it
  • When using Windows Server 2022 as head nodes OS, the Linux compute nodes deployed would be in error state. This is due to Windows Server 2022 by default supports TLS 1.3 which the Linux node agent currently does not support. The mitigation is to disable TLS 1.3 on the head node by importing the following registry keys and restart the server.
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3\Client]
"Enabled"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3\Server]
"Enabled"=dword:00000000