Resolving: Error System.InvalidOperationException: Unable to recycle AppPool ‘AOSService’ running Site ‘AOSService’.

Recently I came across an error while doing a complete build on D365

365poolerror

Error :

Severity Code Description Project File Line Suppression StateSeverity Code Description Project File Line Suppression StateError System.InvalidOperationException: Unable to recycle AppPool ‘AOSService’ running Site ‘AOSService’. Check your IIS/Azure Environment for correct deployment. —> System.Runtime.InteropServices.COMException: The object identifier does not represent a valid object. (Exception from HRESULT: 0x800710D8)   at Microsoft.Web.Administration.Interop.IAppHostMethodInstance.Execute()   at Microsoft.Web.Administration.ConfigurationElement.ExecuteMethod(String methodName)   at Microsoft.Web.Administration.ApplicationPool.Recycle()   at Microsoft.Dynamics.Framework.Tools.AosAppPoolRecycler.RecycleAppPool()   — End of inner exception stack trace —   at Microsoft.Dynamics.Framework.Tools.AosAppPoolRecycler.RecycleAppPool()   at Microsoft.Dynamics.Framework.Tools.BuildTasks.SyncEngineWrapper.Sync(CancellationToken cancellationToken) 0

Solution: 

To verify that an application pool has recycled correctly, follow these steps:

Open Internet Information Services (IIS) Manager as an administrator.

In Connections pane, expand your computer name.

Open Application Pools

Find the AOSService pool and if it is stopped, start it.

app pool

 

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