我们在Azure Web App中的IIS上运行的应用程序偶尔会崩溃。我使用Crash Diagnoser extension监控了该过程，并从Azure存储库中选择了WebException。
我们使用WindowsAzure.Storage 8.1.4库在Azure Web Apps上托管.NET 4.7,64位Web应用程序（使用Kestrel）。
从调用堆栈判断，这似乎不是来自我们的代码本身（如果我错了，请纠正我）。我们确实使用内置的Azure Web App Diagnostic Logs将web和应用程序日志保存到blob存储 - 这可能是它吗？
在xyz.dmp中KERNELBASE的汇编指令！RaiseException in 来自Microsoft Corporation的D：\ Windows \ System32 \ KERNELBASE.dll 在线程202上导致CLR异常，并出现以下错误 信息：
Type: System.Net.WebException Message: The remote server returned an error: (412) The append position condition specified was not met..此异常起源于 System_ni！System.Net.HttpWebRequest.EndGetResponse（System.IAsyncResult）。
请与供应商Microsoft Corporation联系以解决问题 有关以下文件的决议： d：\ Windows \组件\ NativeImages_v4.0.30319_64 \ SYSTEM \ 6ada715406970ca9c23b97933fa5882d \ System.ni.dll
。
[[HelperMethodFrame]]
System_ni!System.Net.HttpWebRequest.EndGetResponse(System.IAsyncResult)+2db
[[HelperMethodFrame]]
System_ni!System.Net.HttpWebRequest.EndGetResponse(System.IAsyncResult)+1d4
Microsoft_WindowsAzure_Storage!Microsoft.WindowsAzure.Storage.Core.Executor.Executor.EndGetResponse[[System.Int64, mscorlib]](System.IAsyncResult)+a1
System_ni!System.Net.LazyAsyncResult.Complete(IntPtr)+51
mscorlib_ni!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+162
mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+14
mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)+52
System_ni!System.Net.ContextAwareResult.Complete(IntPtr)+95
System_ni!System.Net.LazyAsyncResult.ProtectedInvokeCallback(System.Object, IntPtr)+c7
System_ni!System.Net.HttpWebRequest.ProcessResponse()+13a
System_ni!System.Net.HttpWebRequest.SetResponse(System.Net.CoreResponseData)+1a9
System_ni!System.Net.ConnectionReturnResult.SetResponses(System.Net.ConnectionReturnResult)+b0
System_ni!System.Net.Connection.ReadComplete(Int32, System.Net.WebExceptionStatus)+43d
System_ni!System.Net.Connection.ReadComplete(Int32, System.Net.WebExceptionStatus)+378
System_ni!System.Net.LazyAsyncResult.Complete(IntPtr)+51
System_ni!System.Net.LazyAsyncResult.ProtectedInvokeCallback(System.Object, IntPtr)+c7
System_ni!System.Net.Security._SslStream.ProcessFrameBody(Int32, Byte[], Int32, Int32, System.Net.AsyncProtocolRequest)+149
System_ni!System.Net.Security._SslStream.ReadHeaderCallback(System.Net.AsyncProtocolRequest)+a8
System_ni!System.Net.AsyncProtocolRequest.CompleteRequest(Int32)+3b
System_ni!System.Net.FixedSizeReader.CheckCompletionBeforeNextRead(Int32)+27
System_ni!System.Net.FixedSizeReader.ReadCallback(System.IAsyncResult)+77
System_ni!System.Net.LazyAsyncResult.Complete(IntPtr)+51
mscorlib_ni!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+162
mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+14
mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)+52
System_ni!System.Net.ContextAwareResult.Complete(IntPtr)+95
System_ni!System.Net.LazyAsyncResult.ProtectedInvokeCallback(System.Object, IntPtr)+c7
System_ni!System.Net.Sockets.BaseOverlappedAsyncResult.CompletionPortCallback(UInt32, UInt32, System.Threading.NativeOverlapped*)+121
mscorlib_ni!System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32, UInt32, System.Threading.NativeOverlapped*)+7c
[[GCFrame]]
[[DebuggerU2MCatchHandlerFrame]]
KERNELBASE!RaiseException+68 0000000`00000001 0000053`ba92b5e8 0000054`0d1e8dc0 a341630`88d97c00
clr!RaiseTheExceptionInternalOnly+2aa 0000000`00000000 0000000`00000000 0000000`00000000 0000000`00000000
clr!IL_Rethrow+b7 0000002`fffffec0 ffffec8`00000000 0000053`ba92bd98 0000053`ba92bda0
[[HelperMethodFrame]] 0000000`00000000 0000000`00000000 0000000`00000000 0000000`00000000
System_ni!System.Net.HttpWebRequest.EndGetResponse(System.IAsyncResult)+2db 0000000`00000004 0000053`937a6d00 0000053`937a6d00 00007fc`5805552d
clr!ExceptionTracker::CallHandler+fd 0000053`d2e8d120 00007fc`5805552d 0000053`ba92da40 0000053`d2e8d1b8
clr!ExceptionTracker::CallCatchHandler+90 0000053`ba92da40 0000053`ba92bd20 0000053`ba92bac9 0000000`00000001
clr!ProcessCLRException+30f 0000053`ba92d800 0000053`ba92da40 0000000`00000000 0000053`ba92bc30
ntdll!RtlpExecuteHandlerForUnwind+d 0000000`00000000 00007fc`58055464 0000000`0004e39c 0000000`00000000
ntdll!RtlUnwindEx+425 0000053`ba92c930 0000000`00000000 0000000`00000000 0000000`00000000
clr!ClrUnwindEx+40 0000000`00000000 0000053`ba92c930 0000000`00000001 0000000`00000000
clr!ProcessCLRException+2dc 0000053`ba92d890 0000053`ba92da40 0000000`00000000 0000053`ba92c930
ntdll!RtlpExecuteHandlerForException+d 0000000`00000000 0000053`ba92d890 0000000`0004e39c 00007fc`00000000
ntdll!RtlDispatchException+392 568ade4`f9a49000 e2514a1`314ab700 0000000`00000001 0000000`00000000
ntdll!KiUserExceptionDispatch+2e 0000000`00000000 0000000`00000001 0000053`ba92d828 0000000`00000005
KERNELBASE!RaiseException+68 0000000`00000001 0000053`ba92d758 0000054`0d1e8dc0 00007fc`6f832570
clr!RaiseTheExceptionInternalOnly+2aa 0000000`00000000 00007fc`00000008 0000000`2bdf0002 0000053`be0b5258
clr!IL_Throw+10b 0000054`0d009568 0000000`00000001 0000053`ba92da30 0000053`d3f9a920
[[HelperMethodFrame]] 0000000`00000000 0000000`00000000 0000000`00000000 0000000`00000000
System_ni!System.Net.HttpWebRequest.EndGetResponse(System.IAsyncResult)+1d4 0000054`0d007cd8 0000001`00000002 0000054`0d0095e8 0000000`00000000
Microsoft_WindowsAzure_Storage!Microsoft.WindowsAzure.Storage.Core.Executor.Executor.EndGetResponse[[System.Int64, mscorlib]](System.IAsyncResult)+a1 0000000`00000000 0000000`00000000 0000000`00000001 0000000`00000000
System_ni!System.Net.LazyAsyncResult.Complete(IntPtr)+51 0000054`0d009568 0000000`00000001 0000053`ba92dd00 00007fc`5a2cc79e
mscorlib_ni!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+162 00007fc`59e40f80 00007fc`59e40f80 0000053`ba92dc40 00007fc`5a2cc70a
mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+14 0000000`00000000 00007fc`5a21ab6e 0000053`00000001 0000053`d3fe2740
mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)+52 0000053`d3fe2740 00007fc`5a223734 0000054`0d00abd0 0000053`ba92ddd0
System_ni!System.Net.ContextAwareResult.Complete(IntPtr)+95 0000053`d3fe2740 0000054`0d1e7850 0000053`ba92ddd8 0000000`00000000
System_ni!System.Net.LazyAsyncResult.ProtectedInvokeCallback(System.Object, IntPtr)+c7 0000054`0d009568 00007fc`580754db 0000000`00000000 0000054`0d007cd8
System_ni!System.Net.HttpWebRequest.ProcessResponse()+13a 0000054`0d007cd8 0000053`d3fe2740 0000054`0d1e7980 0000000`000000fa
System_ni!System.Net.HttpWebRequest.SetResponse(System.Net.CoreResponseData)+1a9 0000054`0d007cd8 0000000`00000000 0000000`00000000 0000000`00001000
System_ni!System.Net.ConnectionReturnResult.SetResponses(System.Net.ConnectionReturnResult)+b0 0000054`0d1e79b8 0000053`be0b4fb0 0000053`ba92ded0 0000000`00000000
System_ni!System.Net.Connection.ReadComplete(Int32, System.Net.WebExceptionStatus)+43d 0000054`0d007cd8 0000053`ba92df98 0000053`ba92dfa8 0000053`ba92dfa0
System_ni!System.Net.Connection.ReadComplete(Int32, System.Net.WebExceptionStatus)+378 0000053`be0b4ea0 0000054`0d1e6d88 0000053`be0e6ef0 00007fc`58061582
System_ni!System.Net.LazyAsyncResult.Complete(IntPtr)+51 0000054`0d009210 0000053`be14fc68 0000053`ba92e020 0000000`00000000
System_ni!System.Net.LazyAsyncResult.ProtectedInvokeCallback(System.Object, IntPtr)+c7 0000054`0d009210 0000054`0d009270 0000000`00000000 0000053`d3fe3bb8
System_ni!System.Net.Security._SslStream.ProcessFrameBody(Int32, Byte[], Int32, Int32, System.Net.AsyncProtocolRequest)+149 0000054`0d1e6bd8 0000053`0000021f 0000053`be0b4fe0 0000053`be14fcb8
System_ni!System.Net.Security._SslStream.ReadHeaderCallback(System.Net.AsyncProtocolRequest)+a8 0000054`0d009270 00007fc`58054b6f 0000054`0d009368 00007fc`5a203190
System_ni!System.Net.AsyncProtocolRequest.CompleteRequest(Int32)+3b 0000054`0d009270 0000054`0d1e6bd8 0000054`0d0092b0 0000053`be14fcb8
System_ni!System.Net.FixedSizeReader.CheckCompletionBeforeNextRead(Int32)+27 0000000`00000000 000c32e`2350e352 0000000`00000000 00007fc`580167e6
System_ni!System.Net.FixedSizeReader.ReadCallback(System.IAsyncResult)+77 0000000`00000000 0000000`00000000 0000000`00000001 0000000`00000000
System_ni!System.Net.LazyAsyncResult.Complete(IntPtr)+51 0000054`0d0092b0 00007fc`69af39a8 0000053`ba92e650 00007f5`fef8e000
mscorlib_ni!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+162 00007fc`69af39a8 0000053`ba92df58 0000000`00000000 0000000`00000000
mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)+14 0000000`00000000 00007fc`5a21ab6e 0000053`ba92e480 0000000`00000000
mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)+52 0000054`0d0092b0 00007fc`5d942394 0000000`00000000 00007fc`58018126
System_ni!System.Net.ContextAwareResult.Complete(IntPtr)+95 00007fc`5a3f07d8 0000054`0d0092b0 0000054`0d0092b0 0000000`00000001
System_ni!System.Net.LazyAsyncResult.ProtectedInvokeCallback(System.Object, IntPtr)+c7 0000054`0d0092b0 0000053`ba92e508 0000000`00000000 00007fc`69885afb
System_ni!System.Net.Sockets.BaseOverlappedAsyncResult.CompletionPortCallback(UInt32, UInt32, System.Threading.NativeOverlapped*)+121 0000053`ba92e5a0 0000054`00000005 0000053`ef05b5e0 0000000`00000000
mscorlib_ni!System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32, UInt32, System.Threading.NativeOverlapped*)+7c 0000000`00000000 0000000`00000005 0000053`d7b8af48 0000000`00000004
clr!CallDescrWorkerInternal+83 00007fc`6c22f468 0000000`00004b9c 0000000`00004b9c 0000053`ba92e620
clr!CallDescrWorkerWithHandler+4e 0000053`ba92e938 0000000`00000000 0000053`ba92e650 0000000`00000000
clr!DispatchCallSimple+67 0000053`ba92e938 0000053`d7b8af48 0000000`00000005 0000000`00000000
clr!BindIoCompletionCallBack_Worker+c7 0000000`00000000 00007fc`69962080 0000053`ba92e950 0000053`ba92e8b0
[[GCFrame]] 0000000`00000000 0000000`00000000 0000000`00000000 0000000`00000000
clr!ManagedThreadBase_DispatchInner+39 0000053`ba92e8b0 0000000`ffffffff 0000000`0000013c 00007fc`69429bef
clr!ManagedThreadBase_DispatchMiddle+6c 0000000`00000000 00007fc`6959e91b 00007fc`69d27650 00007fc`69429ba7
clr!ManagedThreadBase_DispatchOuter+75 0000000`00000000 0000053`937a6d00 0000053`937a6d00 0000000`00000005
[[DebuggerU2MCatchHandlerFrame]] 0000000`00000000 0000000`00000000 0000000`00000000 0000000`00000000
clr!ManagedThreadBase_FullTransitionWithAD+2f 0000000`00000001 0000000`00000000 0000000`00000000 00007fc`6943f7f5
clr!BindIoCompletionCallbackStubEx+b9 00007fc`699621c0 0000000`80010000 0000053`937a6d00 0000000`00000001
clr!BindIoCompletionCallbackStub+9 0000000`00000001 0000000`80010000 0000000`80010000 0000053`937a6d00
clr!ThreadpoolMgr::CompletionPortThreadStart+5fc 0000000`00000000 0000000`00000000 0000000`00000001 0000000`00000005
clr!Thread::intermediateThreadProc+86 0000000`00000000 0000000`00000000 0000000`00000000 0000000`00000000
kernel32!BaseThreadInitThunk+1a 0000000`00000000 0000000`00000000 0000000`00000000 0000000`00000000
ntdll!RtlUserThreadStart+1d 0000000`00000000 0000000`00000000 0000000`00000000 0000000`00000000