Hotfix XA650R01W2K8R2X64011 for XenApp 6.5

Citrix has released a new hotfix for XenApp 6.5. This fix resolves the following issue:

  1. XenApp servers behind read-only domain controllers (RODCs) might experience slow application launch issues while winlogon.exe spikes CPU usage.

    [From XA650R01W2K8R2X64011][#LA1617]

To install this hotfix:

  1. Copy the hotfix package to an empty folder on the hard drive of the server you want to update.
  2. Close all applications.
  3. Run the executable.
  4. Restart the server. This ensures that the installation completes and that the hotfix is added to the AppCenter hotfix inventory list.

To uninstall this hotfix:

  1. From the Start menu, select Control Panel > Programs and Features.
  2. Highlight the hotfix you want to uninstall and click Uninstall.
  3. Follow the directions on-screen.

Download this hotfix here.

Slow Logons in XenApp Sites with Read-Only Domain Controllers

Symptoms

Users experience slow logons on sites with Read-Only Domain Controllers (RODC). Administrators may also notice a spike in processor usage by winlogon.exe for up to 30 seconds.

Cause

The existence of Read-Only Domain Controllers is causing Active Directory Service Interface (ADSI) calls to take a long time, which in turn is causing a slow logon and winlogon to spike.

Workaround

Switch away from Read-Only Domain Controllers on the site where you are experiencing the issue.

Resolution

Citrix have diagnosed the root-cause behind this issue, and a Private fix is available for XenApp 5, XenApp 6, and XenApp 6.5. As this fix is still a private fix, you must contact Citrix Support to obtain a copy of this.

Please quote CPR Ref: LA1617 when contacting support to assist with locating the correct fix.

Read the original article at the Knowledgebase here.