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This repository was archived by the owner on Nov 22, 2018. It is now read-only.
I just encountered an error while using ResponseCache in conjunction with the Stackify APM extension on Azure. It seems something is trying to insert a duplicate X-StackifyID header. I'm not sure if it is the extension that's misbehaving, or ResponseCache, or just a combination that hadn't been thought of.
My use of the ResponseCache is pretty trivial: [ResponseCache(Duration = 30)]
The error does not occur every time, but it's pretty easy to reproduce.
exception": "System.ArgumentException: An item with the same key has already been added. Key: X-StackifyID\r\n at System.ThrowHelper.ThrowAddingDuplicateWithKeyArgumentException(Object key)\r\n at System.Collections.Generic.Dictionary2.Insert(TKey key, TValue value, Boolean add)\r\n at System.Collections.Generic.Dictionary2.Add(TKey key, TValue value)\r\n at Microsoft.AspNetCore.Server.Kestrel.Internal.Http.FrameResponseHeaders.AddValueFast(String key, StringValues value)\r\n at Microsoft.AspNetCore.Server.Kestrel.Internal.Http.FrameHeaders.System.Collections.Generic.IDictionary<System.String,Microsoft.Extensions.Primitives.StringValues>.Add(String key, StringValues value)\r\n at Microsoft.AspNetCore.Server.Kestrel.Internal.Http.FrameHeaders.System.Collections.Generic.ICollection<System.Collections.Generic.KeyValuePair<System.String,Microsoft.Extensions.Primitives.StringValues>>.Add(KeyValuePair2 item)\r\n at Microsoft.AspNetCore.ResponseCaching.ResponseCachingMiddleware.d__10.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter1.GetResult()\r\n at Microsoft.AspNetCore.ResponseCaching.ResponseCachingMiddleware.d__11.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---