azure-functions-host: Function host is not running. Host Job Stop after Timeout or Function Error

Investigative information

Please provide the following:

• Timestamp: [20/12/2017 16:09:19.661]
• Function App version (1.0 or 2.0-beta): 2.0-beta
• Invocation ID: ddcceb06-d3f0-42e6-aae4-6ee4a0e50404’
• Region: East US 2
• Language: Javascript

Captured the following error output…

Function had errors. See Azure WebJobs SDK dashboard for details. Instance ID is 'ddcceb06-d3f0-42e6-aae4-6ee4a0e50404'
Microsoft.Azure.WebJobs.Host.FunctionTimeoutException : Timeout value of 00:30:00 was exceeded by function: <MyFunctionName>
 at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.TryHandleTimeoutAsync(Task invokeTask,CancellationToken shutdownToken,Boolean throwOnTimeout,CancellationToken timeoutToken,TimeSpan timeoutInterval,IFunctionInstance instance,Action onTimeout) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs : 658
 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
 at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.InvokeAsync(IFunctionInvoker invoker,ParameterHelper parameterHelper,CancellationTokenSource timeoutTokenSource,CancellationTokenSource functionCancellationTokenSource,Boolean throwOnTimeout,TimeSpan timerInterval,IFunctionInstance instance) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs : 580
 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
 at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithWatchersAsync(IFunctionInstance instance,ParameterHelper parameterHelper,TraceWriter traceWriter,CancellationTokenSource functionCancellationTokenSource) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs : 534
 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
 at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(??) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs : 477
 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
 at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(??) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs : 264
 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
 at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(??) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs : 320
 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
 at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.TryExecuteAsync(IFunctionInstance functionInstance,CancellationToken cancellationToken) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs : 96
Job host stopped
info: Host.Startup[0]
    => RequestId:0HLA78K6RN59G:0000000F RequestPath: => Microsoft.Azure.WebJobs.Script.WebHost.Controllers.AdminController.Invoke (Microsoft.Azure.WebJobs.Script.WebHost)
    Job host stopped

After the timeout or function failure the host stops and doesn’t return until we kill w3wp.exe via kudu console. The function app is not accessible via the portal blades - just spinning wheel. Navigating to website shows Function host is not running., and all functions stop running.