[Bug] Microsoft.IdentityModel.Protocols.ConfigurationManager.UpdateCurrentConfiguration blocks the system

[jw444]

Which version of Microsoft.IdentityModel are you using?
8.0.2

Note that to get help, you need to run the latest version.

Where is the issue?

• M.IM.JsonWebTokens
• M.IM.KeyVaultExtensions
• M.IM.Logging
• M.IM.ManagedKeyVaultSecurityKey
• [X ] M.IM.Protocols
• M.IM.Protocols.OpenIdConnect
• M.IM.Protocols.SignedHttpRequest
• M.IM.Protocols.WsFederation
• M.IM.TestExtensions
• M.IM.Tokens
• M.IM.Tokens.Saml
• M.IM.Validators
• M.IM.Xml
• S.IM.Tokens.Jwt
• Other (please describe)

Is this a new or an existing app?
a. The app is in production and I have upgraded to a new version of Microsoft.IdentityModel.*

We host a web service (CSES) on Azure. After a recent upgrade of the Microsoft.IdentityModel packages, our service became irresponsive when the load is high. The dump shows that most of the thread (more than 3000) are stuck waiting for something. Here is the call stack:

ntdll.dll!NtWaitForMultipleObjects()    Unknown

KERNELBASE.dll!WaitForMultipleObjectsEx() Unknown
[Managed to Native Transition]
mscorlib.dll!System.Threading.ManualResetEventSlim.Wait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken) Unknown
mscorlib.dll!System.Threading.Tasks.Task.SpinThenBlockingWait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken) Unknown
mscorlib.dll!System.Threading.Tasks.Task.InternalWait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken) Unknown
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task task) Unknown
[Waiting on Async Operation, double-click or press enter to view Async Call Stacks]
Microsoft.IdentityModel.Protocols.dll!Microsoft.IdentityModel.Protocols.ConfigurationManager<Microsoft.IdentityModel.Protocols.OpenIdConnect.OpenIdConnectConfiguration>.UpdateCurrentConfiguration() Line 320 C#
mscorlib.dll!System.Threading.Tasks.Task.Execute() Unknown
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.Tasks.Task.ExecuteWithThreadLocal(ref System.Threading.Tasks.Task currentTaskSlot) Unknown
mscorlib.dll!System.Threading.Tasks.Task.ExecuteEntry(bool bPreventDoubleExecution) Unknown
mscorlib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch() Unknown
[Native to Managed Transition]
kernel32.dll!BaseThreadInitThunk() Unknown
ntdll.dll!RtlUserThreadStart() Unknown

Is this a known issue? Any solutions?
We are running .net framework 4.7.2. The version for Microsoft.IdentityModel.Protocols.dll is 8.0.2.

[pmaytak]

@jw444 This may have been fixed in 8.1.1. Can you try to repro with the latest 8.2.0?

[jw444]

Thank you @pmaytak. I've upgraded to 8.2.0, and the tests so far seem to show that the issue is indeed fixed.