Hotfix XS71ECU2065 – 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 None
Content live patchable** No
Baselines for Live Patch N/A
Revision History

Published on Oct 18, 2021

** Available to Enterprise Customers.

Issues Resolved In This Hotfix

This hotfix resolves the following issues:

  • In certain conditions, storage garbage collection can leave a VM and its VDI in an unexpected state. This unexpected state can cause an SR_BACKEND_FAILURE_46 exception during garbage collection and can cause commands such as VM shutdown to fail.
  • If installation of a hotfix or driver disk interrupts garbage collection on the storage manager and the installation requires a restart, some VMs might fail to resume after the restart.
  • When an NFS SR is full or close to full, snapshot operations can sometimes fail such that they cannot be reverted. This failure to revert leaves the VDI unavailable. This update ensures that the VDI is not removed or renamed until all snapshot operations are completed.
  • Under certain conditions the tapdisk process for a VM can crash when updating performance statistics.
  • Excessive logging from vhd-util impacts performance of the storage garbage collection process.
  • When HA is enabled in a pool that uses NFS shared storage, a server that shuts down might not rejoin the pool when it restarts.

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. When the installation is complete, see the Post-update tasks in the table Information About this Hotfix for information about any post-update tasks you should perform for the update to take effect. 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.

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:

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.

Note: If you click Cancel at this stage, the Install Update wizard reverts the changes and removes the update file from the host.

  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 XS71ECU2065.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. Choose the Update Mode. Review the information displayed on the screen and select an appropriate mode.
  10. 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.
  11. When the update is applied, click Finish to close the wizard.
  12. 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>XS71ECU2065.iso

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


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

    xe update-pool-apply uuid=a0769d4d-1413-4366-bc47-a7f3240111a8

    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=a0769d4d-1413-4366-bc47-a7f3240111a8

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

    xe update-list -s <server> -u root -pw <password> name-label=XS71ECU2065

    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. 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=a0769d4d-1413-4366-bc47-a7f3240111a8

Hotfix Source

This source code is not necessary for hotfix installation: it is provided to fulfill licensing obligations.

Log in to verify download permissions

You must be logged in to your Citrix account to access the following link and to download the source code for any modified open source components XS71ECU2065-sources.iso.


Hotfix File

Component Details
Hotfix Filename XS71ECU2065.iso
Hotfix File sha256 eabf414433a25a1d65e57b88ade47912560499aeb8995261b0ff7af2f387702a
Hotfix Source Filename XS71ECU2065-sources.iso
Hotfix Source File sha256 2b85bc4c0a7b2f3a1a8940e0e44c7d35b792f680d21d9952ebdf168a499e2ea4
Hotfix Zip Filename
Hotfix Zip File sha256 93adc68cb5a4d185340e81b965bc5ed614376b6fc13acb95e954546207d38573
Size of the Zip file 1.26 MB

Files Updated


More Information

For more information, see XenServer Documentation.

If you experience any difficulties, contact Citrix Technical Support.


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