Why are we getting System.InvalidOperationException Response was not set, make sure SendAsync was called.

Question

Exception Details:

System.InvalidOperationException: at Azure.Core.HttpMessage.get_Response (Azure.Core, Version=1.19.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Diagnostics.DiagnosticSourceEventSource+TransformSpec+PropertySpec+PropertyFetch+RefTypedFetchProperty2.Fetch (System.Diagnostics.DiagnosticSource, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51) at System.Diagnostics.DiagnosticSourceEventSource+TransformSpec+PropertySpec.Fetch (System.Diagnostics.DiagnosticSource, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51) at System.Diagnostics.DiagnosticSourceEventSource+TransformSpec.Morph (System.Diagnostics.DiagnosticSource, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51) at System.Diagnostics.DiagnosticSourceEventSource+FilterAndTransform.Morph (System.Diagnostics.DiagnosticSource, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51) at System.Diagnostics.DiagnosticSourceEventSource+FilterAndTransform+<>c__DisplayClass2_1.<.ctor>b__2 (System.Diagnostics.DiagnosticSource, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51) at System.Diagnostics.DiagnosticSourceEventSource+CallbackObserver1.OnNext (System.Diagnostics.DiagnosticSource, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51) at System.Diagnostics.DiagnosticListener.Write (System.Diagnostics.DiagnosticSource, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51) at System.Diagnostics.DiagnosticSource.StartActivity (System.Diagnostics.DiagnosticSource, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51) at Azure.Core.Pipeline.RequestActivityPolicy+<ProcessAsync>d__9.MoveNext (Azure.Core, Version=1.19.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable+ConfiguredValueTaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Azure.Core.Pipeline.ResponseBodyPolicy+<ProcessAsync>d__5.MoveNext (Azure.Core, Version=1.19.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable+ConfiguredValueTaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Azure.Core.Pipeline.LoggingPolicy+<ProcessAsync>d__9.MoveNext (Azure.Core, Version=1.19.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable+ConfiguredValueTaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Azure.Core.Pipeline.HttpPipelineSynchronousPolicy+<<ProcessAsync>g__ProcessAsyncInner|4_0>d.MoveNext (Azure.Core, Version=1.19.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable+ConfiguredValueTaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Azure.Core.Pipeline.RedirectPolicy+<ProcessAsync>d__5.MoveNext (Azure.Core, Version=1.19.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable+ConfiguredValueTaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Azure.Core.Pipeline.RetryPolicy+<ProcessAsync>d__11.MoveNext (Azure.Core, Version=1.19.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Azure.Core.Pipeline.RetryPolicy+<ProcessAsync>d__11.MoveNext (Azure.Core, Version=1.19.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.ConfiguredValueTaskAwaitable+ConfiguredValueTaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Azure.Storage.Blobs.BlobRestClient+<RenewLeaseAsync>d__42.MoveNext (Azure.Storage.Blobs, Version=12.9.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.ConfiguredTaskAwaitable1+ConfiguredTaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Azure.Storage.Blobs.Specialized.BlobLeaseClient+<RenewInternal>d__29.MoveNext (Azure.Storage.Blobs, Version=12.9.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.ConfiguredTaskAwaitable1+ConfiguredTaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Azure.Storage.Blobs.Specialized.BlobLeaseClient+<RenewAsync>d__28.MoveNext (Azure.Storage.Blobs, Version=12.9.0.0, Culture=neutral, PublicKeyToken=92742159e12e44c8) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Microsoft.Azure.WebJobs.Script.BlobLeaseDistributedLockManager+SingletonLockHandle+<RenewAsync>d__17.MoveNext (Microsoft.Azure.WebJobs.Script, Version=3.25.0.0, Culture=neutral, PublicKeyToken=null: D:\a\_work\1\s\src\WebJobs.Script\Host\DistributedLockManagers\BlobLeaseDistributedLockManager.cs:333) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Microsoft.Azure.WebJobs.Host.SingletonManager+RenewLeaseCommand+<ExecuteAsync>d__4.MoveNext (Microsoft.Azure.WebJobs.Host, Version=3.0.38.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: D:\a_work\1\s\src\Microsoft.Azure.WebJobs.Host\Singleton\SingletonManager.cs:337) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Microsoft.Azure.WebJobs.Host.Timers.TaskSeriesTimer+<RunAsync>d__14.MoveNext (Microsoft.Azure.WebJobs.Host, Version=3.0.38.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: D:\a_work\1\s\src\Microsoft.Azure.WebJobs.Host\Timers\TaskSeriesTimer.cs:151)

Answer 1

Hello Vinit Raj,

Issue: System.InvalidOperationException: “Response was not set, make sure SendAsync was called.”

Root Cause:

Our analysis of the stack trace indicates that the failure occurred during the Azure Functions host lock (blob lease) renewal process used for timer trigger and singleton execution coordination.

In this scenario, the Azure Storage lease renewal request did not successfully complete, which prevented the Azure SDK from receiving an HTTP response.

When the SDK pipeline later attempted to access the response object, it raised the above exception.

The lease renewal failure is most commonly caused by one of the following:

Storage lease contention when multiple Function Apps share the same storage account and generate an identical Host ID

Lease mismatch or expired/broken lease in the Azure Storage container used for host locking

Transient authentication, networking, or SDK diagnostic pipeline issues preventing the HTTP request from completing

Resolution:

To remediate and prevent recurrence, we recommend the following actions:

Ensure unique host locking

Avoid sharing the same storage account between multiple Function Apps when possible, or

Configure a unique hostId for each Function App.

Validate storage connectivity and authentication

Confirm the storage connection string or managed identity permissions.

Verify no firewall, private endpoint, or networking restriction is blocking access.

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