Why would half of Azure worker instances not start and hit a SecurityException?

1
votes

I'm trying to increase the number of instances deployed for a cloud service. When I do the deploy 5 out of the 10 instances deploy correctly. The other half never start and get a "System.Security.SecurityException".

Very frustrating since I would think the package deployed is the same to all 10 instances. Why would only half fail? Any ideas on how to troubleshoot? Thanks!

What I've tried so far

  • Deleted and created new cloud service
  • Toggle deploy update option on and off

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Full stack of exception

Application: WaWorkerHost.exe Framework Version: v4.0.30319 Description: The process was terminated due to an unhandled exception. Exception Info: System.Security.SecurityException Stack: at Microsoft.WindowsAzure.ServiceRuntime.Implementation.Loader.RoleRuntimeBridge.b__0() at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object) at System.Threading.ThreadHelper.ThreadStart()

1
.netazurecloud

1 Answers

0
votes

Turns out it was a Firewall setting on the SQL Server. The error was trying to write out to the registry, which was causing the security exception.