Monday, July 16, 2012

Windows Server 2008 stops responding and hangs at the "Applying User Settings" stage of the logon process

An issue was flagged to me last week that a HyperV Guest running on Windows 2008 Sp2 is starting up extremely slowly (Applying Computer settings, Applying Security Policies etc) and it can take up to hours for the Server to reach the Logon Screen.

Even though I could logon to the server , it has been found that multiple services inclusive of the below are not started. Weird!!

Print Spooler
Terminal Services
Server service
Remote Registry
Windows Management Instrumentation (WMI)
Distributed Transaction Coordinator
Any services that are related to applications

After several rounds of troubleshooting which includes

- Booting to Safe mode (Booting to safe mode flies)
- Re-installing the HyperV integration Disk
- Tweaking Physical NIC settings

I finally came across a Microsoft Article (http://support.microsoft.com/kb/2004121) that more or less describes what I am facing.

This issue occurs because of a deadlock in the Service Control Manager database.

The Service Control Manager tries to start the HTTP.sys service and then puts a lock in place in the Service Control Manager database. Then, HTTP.sys makes a call that requires Cryptographic Services during startup. Then, a request is sent to start Cryptographic Services. However, a lock is already in place in the Service Control Manager database. Therefore, a deadlock occurs.

To verify that this is true, run "sc querylock" from command prompt.
The output below will indicate that the Service Control manager (SCM) databse is locked

QueryServiceLockstatus - Success
IsLocked : True
LockOwner : .\NT Service Control Manager
LockDuration : 1090 (seconds since acquired)


To Resolve the issue

You can modify the behavior of HTTP.SYS to depend on another service being started first. To do this, perform the following steps:

1) Open Registry Editor
2) Navigate to HKLM\SYSTEM\CurrentControlSet\Services\HTTP and create the following Multi-string value:DependOnService
3) Double click the new DependOnService entry 
4)Type CRYPTSVC in the Value Data field and click OK.
5) Reboot the server

Thursday, July 12, 2012

RDP clients and ICA clients cannot connect to a Windows Server 2003-based terminal server after hotfix 938759 is applied to the server

Encounter an issue of users being unable to logon to some of our Citrix Servers running on Windows 2003 R2 Sp2 after deployment of the security update (KB2653956, http://support.microsoft.com/kb/2653956)


It seems to be known issue that only affects Windows 2003 server but Not Windows 20008 Servers. The issue can be corrected by applying the hotfix listed in the KB below.
http://support.microsoft.com/kb/958476


Interesting that this is not corrected by Microsoft in the fix to prevent the issue from affecting the Windows 2003 Server and instead provided a hotfix to correct those that maybe affected
:(

Tuesday, July 10, 2012

Removing Delete Computers from SCOM View


There will be times when the SCOM agent has been a decommissioned server but after some time, this object is still displayed on the SCOM Computers view.

If removal is required, the SQL statement below will enable you to do so

UPDATE [OperationsManager].[dbo].[BaseManagedEntity] SET [IsDeleted] = 1   WHERE [DisplayName] LIKE 'servername'