Hotfix XS71ECU2039 – For XenServer 7.1 Cumulative Update 2

Who Should Install This Hotfix?

This is a hotfix for customers running XenServer 7.1 Cumulative Update 2.

Note: This hotfix is available only to customers on the Customer Success Services program.

Information About this Hotfix

Component Details
Prerequisite None
Post-update tasks Restart Host
Content live patchable** No
Baselines for Live Patch N/A
Revision History

Published on May 14, 2020

** Available to Enterprise Customers.

Issues Resolved In This Hotfix

This hotfix reduces the performance impacts mentioned in CTX275165 – Citrix XenServer Multiple Security Updates.

This hotfix also resolves the following issues:

  • A system with a software FCoE connection might experience a persistent memory leak in Dom0 kernel that eventually results in a host crash, sudden loss of connectivity, or other issue.
  • The XenServer host might crash because of a kernel NULL pointer dereference.
  • If there are a lot of iSCSI login/logout requests at the same time or one after another, dom0 can experience kernel panic and crash.

This hotfix also includes the following previously released hotfixes:

Installing the Hotfix

Customers should use either XenCenter or the XenServer Command Line Interface (CLI) to apply this hotfix. As with any software update, back up your data before applying this update. Citrix recommends updating all hosts within a pool sequentially. Upgrading of hosts should be scheduled to minimize the amount of time the pool runs in a “mixed state” where some hosts are upgraded and some are not. Running a mixed pool of updated and non-updated hosts for general operation is not supported.

Note: The attachment to this article is a zip file. It contains the hotfix update package only. Click the following link to download the source code for any modified open source components XS71ECU2039-sources.iso. The source code is not necessary for hotfix installation: it is provided to fulfill licensing obligations.

Installing the Hotfix by using XenCenter

Choose an Installation Mechanism

There are three mechanisms to install a hotfix:

  1. Automated Updates
  2. Download update from Citrix
  3. Select update or Supplemental pack from disk

The Automated Updates feature is available for XenServer Enterprise Edition customers, or to those who have access to XenServer through their XenApp/XenDesktop entitlement. For information about installing a hotfix using the Automated Updates feature, see the Applying Automated Updates in the XenServer documentation.

For information about installing a hotfix using the Download update from Citrix option, see Applying an Update to a Pool in the XenServer documentation.

The following section contains instructions on option (3) installing a hotfix that you have downloaded to disk:

  1. Download the hotfix to a known location on a computer that has XenCenter installed.
  2. Unzip the hotfix zip file and extract the .iso file
  3. In XenCenter, on the Tools menu, select Install Update. This displays the Install Update wizard.
  4. Read the information displayed on the Before You Start page and click Next to start the wizard.
  5. Click Browse to locate the iso file, select XS71ECU2039.iso and then click Open.
  6. Click Next.
  7. Select the pool or hosts you wish to apply the hotfix to, and then click Next.
  8. The Install Update wizard performs a number of update prechecks, including the space available on the hosts, to ensure that the pool is in a valid configuration state. The wizard also checks whether the hosts need to be rebooted after the update is applied and displays the result.
  9. Follow the on-screen recommendations to resolve any update prechecks that have failed. If you want XenCenter to automatically resolve all failed prechecks, click Resolve All. When the prechecks have been resolved, click Next.

  10. Choose the Update Mode. Review the information displayed on the screen and select an appropriate mode.
  11. Note: If you click Cancel at this stage, the Install Update wizard reverts the changes and removes the update file from the host.

  12. Click Install update to proceed with the installation. The Install Update wizard shows the progress of the update, displaying the major operations that XenCenter performs while updating each host in the pool.
  13. When the update is applied, click Finish to close the wizard.
  14. If you chose to carry out the post-update tasks, do so now.

Installing the Hotfix by using the xe Command Line Interface

  1. Download the hotfix file to a known location.
  2. Extract the .iso file from the zip.
  3. Upload the .iso file to the Pool Master by entering the following commands:

    (Where -s is the Pool Master’s IP address or DNS name.)

    xe -s <server> -u <username> -pw <password> update-upload file-name=<filename>XS71ECU2039.iso

    XenServer assigns the update file a UUID which this command prints. Note the UUID.

    22dc61b4-049a-48df-bb24-da0c4a1b533e

  4. Apply the update to all hosts in the pool, specifying the UUID of the update:

    xe update-pool-apply uuid=22dc61b4-049a-48df-bb24-da0c4a1b533e

    Alternatively, if you need to update and restart hosts in a rolling manner, you can apply the update file to an individual host by running the following:

    xe update-apply host=<host> uuid=22dc61b4-049a-48df-bb24-da0c4a1b533e

  5. Verify that the update was applied by using the update-list command.

    xe update-list -s <server> -u root -pw <password> name-label=XS71ECU2039

    If the update is successful, the hosts field contains the UUIDs of the hosts to which this patch was successfully applied. This should be a complete list of all hosts in the pool.

  6. If the hotfix is applied successfully, restart each host in the pool, starting with the master.
  7. Use the update-pool-clean command to remove the update files from all hosts in the pool. This command frees up space on shared storage and does not uninstall the update.

    xe update-pool-clean uuid=22dc61b4-049a-48df-bb24-da0c4a1b533e

Files

Hotfix File

Component Details
Hotfix Filename XS71ECU2039.iso
Hotfix File sha256 51b7246a29c025bf9b75340b52763ee6fcc3b2ffa12ebcb25ba3023a16a69310
Hotfix Source Filename XS71ECU2039-sources.iso
Hotfix Source File sha256 06670dad93b0308a1d0274cc8345e6d0bde742f5a78a717ddb77587130ff5506
Hotfix Zip Filename XS71ECU2039.zip
Hotfix Zip File sha256 1a7e06b075d481fb020353a0dca6d4bb657b169c4546628b5dafb8db7e6a712e
Size of the Zip file 21.02 MB

Files Updated

kernel-4.4.27-600.1.16.x86_64.rpm

More Information

For more information, see XenServer Documentation.

If you experience any difficulties, contact Citrix Technical Support.

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