Virtual DC disappearing from DNS every hour

[phoenix79]

I have a secondary DC running in a Hyper-V VM that yesterday got updated with the following updates. Ever since, its HOST(A) record has been disappearing from the DNS for exactly 5 minutes (according to our server monitoring software). This server is a DC, DNS, and print server, but this is all that it does. Also, it is the secondary on all of these roles. It was working fine until the updates so they are my prime suspect. Please help.



- Security Update for Windows Server 2008 R2 x64 Edition (KB975467)

- Update for Windows Server 2008 R2 x64 Edition (KB980408)

- Security Update for Windows Server 2008 R2 x64 Edition (KB981332)

- Update for Best Practices Analyzer for Active Directory Rights Management Services for Windows Server 2008 R2 x64 Edition (KB981391)

- Update for Best Practices Analyzer for Windows Server Update Services for Windows Server 2008 R2 x64 Edition (KB981390)

- Security Update for Windows Server 2008 R2 x64 Edition (KB978601)

- Windows Malicious Software Removal Tool x64 - May 2010 (KB890830)

- Update for Windows Server 2008 R2 x64 Edition (KB979306)

- Security Update for Windows Server 2008 R2 x64 Edition (KB978542)

- Update for Windows Server 2008 R2 x64 Edition (KB974431)

- Update for Best Practices Analyzer for File Services for Windows Server 2008 R2 x64 Edition (KB981111)

- Update for Best Practices Analyzer for Network Policy and Access Services for Windows Server 2008 R2 x64 Edition (NPA

 

[phoenix79]

hmmm, a restart seems to have cleared it up. Go figure...

 

[OutHouse]

im glad that restart fixed it but at the sametime rebooting a production box is not always an option.

 

[phoenix79]

Luckily this machine is just a backup, basically a mirror of our primary that we can alias to in case of emergency.