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Connector errors, timeout, restart needed.
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@atripp Yes, we are running nginx. But I will look into the keep-alive connections and see if that can give some hint on the problem.
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It is still an issue, tested to update the host Ubuntu to the latest 18.04 packages to see if something gets better from that (including a later docker).
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Hi @patchlings,
Have you enabled the nginx HTTP Stub Status module on your nginx proxy? I would be interested to see the number of open and waiting connections. Although this article is old, nginx: See Active connections / Connections Per Seconds seems to show a pretty easy configuration to see this status. I would be curious to see these counts when the problem exists. Would you be able to enable this and post the counts when everything is working and when it is not?
Thanks,
Rich -
@rhessinger I will look into that!
Meanwhile, I tested to run "kill -QUIT $MONO_PID" to get some thread dumps from the mono process when the problem appears.
"Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool I/O Selector" at <unknown> <0xffffffff> at (wrapper managed-to-native) System.Threading.ThreadPool.RequestWorkerThread () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.EnsureThreadRequested () [0x0001f] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Enqueue (System.Threading.IThreadPoolWorkItem,bool) [0x00071] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPool.UnsafeQueueCustomWorkItem (System.Threading.IThreadPoolWorkItem,bool) [0x00007] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object_byte (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) System.Net.Sockets.Socket.Receive_internal (intptr,byte*,int,System.Net.Sockets.SocketFlags,int&,bool) [0x00000] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.Socket.Receive_internal (System.Net.Sockets.SafeSocketHandle,byte*,int,System.Net.Sockets.SocketFlags,int&,bool) [0x0000c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.Socket.Receive (byte[],int,int,System.Net.Sockets.SocketFlags,System.Net.Sockets.SocketError&) [0x0002e] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.Socket.Receive (byte[],int,int,System.Net.Sockets.SocketFlags) [0x00000] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.NetworkStream.Read (byte[],int,int) [0x00065] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Data.SqlClient.SNI.SslOverTdsStream/<ReadInternal>d__11.MoveNext () [0x000e8] in <0864334e7e474248b37afca9b637daa9>:0 at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1<int>.Start<System.Data.SqlClient.SNI.SslOverTdsStream/<ReadInternal>d__11> (System.Data.SqlClient.SNI.SslOverTdsStream/<ReadInternal>d__11&) [0x0002c] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Data.SqlClient.SNI.SslOverTdsStream.ReadInternal (byte[],int,int,System.Threading.CancellationToken,bool) [0x0004d] in <0864334e7e474248b37afca9b637daa9>:0 at System.Data.SqlClient.SNI.SslOverTdsStream.Read (byte[],int,int) [0x00009] in <0864334e7e474248b37afca9b637daa9>:0 at Mono.Net.Security.MobileAuthenticatedStream/<>c__DisplayClass66_0.<InnerRead>b__0 () [0x0002b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.Tasks.Task`1<int>.InnerInvoke () [0x0000f] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.Execute () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.ExecutionContextCallback (object) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.ExecuteWithThreadLocal (System.Threading.Tasks.Task&) [0x00034] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.ExecuteEntry (bool) [0x0004a] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Timer-Scheduler" at <unknown> <0xffffffff> at (wrapper managed-to-native) System.Threading.WaitHandle.Wait_internal (intptr*,int,bool,int) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.WaitHandle.WaitOneNative (System.Runtime.InteropServices.SafeHandle,uint,bool,bool) [0x00044] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.WaitHandle.InternalWaitOne (System.Runtime.InteropServices.SafeHandle,long,bool,bool) [0x00014] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.WaitHandle.WaitOne (long,bool) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.WaitHandle.WaitOne (int,bool) [0x00019] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.WaitHandle.WaitOne (int) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Timer/Scheduler.SchedulerThread () [0x0003c] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadHelper.ThreadStart_Context (object) [0x00014] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) [0x0002b] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadHelper.ThreadStart () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) object.runtime_invoke_void__this__ (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "<unnamed thread>" at <unknown> <0xffffffff> at (wrapper managed-to-native) Interop/Sys.Read (intptr,byte*,int) [0x00000] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at Interop/Sys.Read (Microsoft.Win32.SafeHandles.SafeFileHandle,byte*,int) [0x00012] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.IO.CoreFX.FileSystemWatcher/RunningInstance.TryReadEvent (System.IO.CoreFX.FileSystemWatcher/RunningInstance/NotifyEvent&) [0x00027] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.IO.CoreFX.FileSystemWatcher/RunningInstance.ProcessEvents () [0x002dc] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.IO.CoreFX.FileSystemWatcher/RunningInstance/<>c.<Start>b__14_0 (object) [0x00000] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.Tasks.Task.InnerInvoke () [0x00025] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.Execute () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.ExecutionContextCallback (object) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.ExecuteWithThreadLocal (System.Threading.Tasks.Task&) [0x00034] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.ExecuteEntry (bool) [0x0004a] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.ThreadPoolTaskScheduler/<>c.<.cctor>b__10_0 (object) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadHelper.ThreadStart_Context (object) [0x00025] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) [0x0002b] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadHelper.ThreadStart (object) [0x0000f] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_void__this___object (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Finalizer" "<unnamed thread>" at <unknown> <0xffffffff> at (wrapper managed-to-native) Interop/Sys.Read (intptr,byte*,int) [0x00000] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at Interop/Sys.Read (Microsoft.Win32.SafeHandles.SafeFileHandle,byte*,int) [0x00012] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.IO.CoreFX.FileSystemWatcher/RunningInstance.TryReadEvent (System.IO.CoreFX.FileSystemWatcher/RunningInstance/NotifyEvent&) [0x00027] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.IO.CoreFX.FileSystemWatcher/RunningInstance.ProcessEvents () [0x002dc] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.IO.CoreFX.FileSystemWatcher/RunningInstance/<>c.<Start>b__14_0 (object) [0x00000] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.Tasks.Task.InnerInvoke () [0x00025] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.Execute () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.ExecutionContextCallback (object) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.ExecuteWithThreadLocal (System.Threading.Tasks.Task&) [0x00034] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.Task.ExecuteEntry (bool) [0x0004a] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.Tasks.ThreadPoolTaskScheduler/<>c.<.cctor>b__10_0 (object) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadHelper.ThreadStart_Context (object) [0x00025] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) [0x0002b] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadHelper.ThreadStart (object) [0x0000f] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_void__this___object (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 "Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 ... a lot more rows ... Running Execution Dispatcher...Is there a way to attach a complete log file? this forum will only allow 32000 chars :-)
-
Hi @patchlings ,
I was doing some Docker research around this issue. Something I found Docker users complaining about was an issue with the total number of available connections on the host. It seems that the more containers running on a host (especially with database containers on it), the connection count can get spread a bit thin under load. Have you tried increasing the max number of connections? Here is a StackOverflow about increasing them Increasing the maximum number of TCP/IP connections in Linux.
Also, how many connectors do you have on your NuGet feed?
Thanks,
Rich -
@rhessinger We have enabled the stub_status for Nginx, when the problem appeared just now the status showed the following page:
Active connections: 15
server accepts handled requests
428494 428494 756561
Reading: 0 Writing: 2 Waiting: 13We have some network connection monitoring with prometheus for the host and they show nothing specific (see attached image)
-
@rhessinger said in Connector errors, timeout, restart needed.:
Also, how many connectors do you have on your NuGet feed?
Sorry, I missed this question... We have four connectors (but only uses three of them):
And when I looked that up I noticed that the one we don't use was marked with error, removed it.
-
-
@rhessinger 99% NuGet connector errors.
-
Hi @patchlings,
Thank you very much for the information. I'm researching the issue more on our side. I may send over some more questions your way while I'm working on this.
Thanks,
Rich -
Now it's seems flaky again:
nginx status:
Active connections: 57
server accepts handled requests
462208 462208 840656
Reading: 0 Writing: 30 Waiting: 27Main web UI can't be reached at all.
Ransudo kill -QUIT $MONO_PIDand got myself a huge thread dump with a lot of entries like this (let me know if you want me to supply the entire dump, (it's more then the allowed 32k chars):"Thread Pool Worker" at <unknown> <0xffffffff> at (wrapper managed-to-native) object.__icall_wrapper_mono_monitor_enter_v4_internal (object,intptr) [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Net.HttpListener.RegisterContext (System.Net.HttpListenerContext) [0x00035] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnReadInternal (System.IAsyncResult) [0x0014c] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpConnection.OnRead (System.IAsyncResult) [0x00006] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.Sockets.SocketAsyncResult/<>c.<Complete>b__27_0 (object) [0x0000b] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <c453bf849bb84e719dbec0475e99db95>:0 at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <c453bf849bb84e719dbec0475e99db95>:0 at (wrapper runtime-invoke) <Module>.runtime_invoke_bool (object,intptr,intptr,intptr) [0x0002a] in <c453bf849bb84e719dbec0475e99db95>:0 -
One interesting observation is that when the system "freezes" there seems to be no traffic at all (12:30):
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Performing strace on the mono process gives a lot of:
[pid 26706] recvfrom(39, "", 8, 0, NULL, NULL) = 0 [pid 26706] recvfrom(39, "", 8, 0, NULL, NULL) = 0 [pid 26706] recvfrom(39, "", 8, 0, NULL, NULL) = 0 [pid 26706] recvfrom(39, "", 8, 0, NULL, NULL) = 0 [pid 26706] recvfrom(39, "", 8, 0, NULL, NULL) = 0 [pid 26706] recvfrom(39, "", 8, 0, NULL, NULL) = 0 [pid 26706] recvfrom(39, "", 8, 0, NULL, NULL) = 0Then I found this: https://stackoverflow.com/questions/24000534/tracing-socket-file-descriptor-back-to-bound-address
So the next step will be to see if I can find out which socket that is actually appearing in the strace.
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Hi @patchlings ,
Thanks for all this information. Would you be able to get me an open thread count for when everything is running fine and when things are not? You should be able to find it by running
sudo ps huH p <PID_OF_MONO_PROCESS> | wc -l. Also, are you running these commands inside the docker image? Or on the host?Thanks,
Rich -
@rhessinger Hi, if I run it on the host (or in the actual container) it seems to vary between 25-45, haven't seem anything different between when it behaves bad:
ubuntu@proget:/opt/provision/additional$ sudo ps huH p 12436 | wc -l 29 ubuntu@proget:/opt/provision/additional$ sudo ps huH p 12436 | wc -l 44 -
Hi @patchlings,
Thank you for checking this for me. So the good thing is that this is definitely not a threading issue. Can you give me a stub status when it's working during normal use and one after it starts behaving poorly?
Thanks,
Rich -
@rhessinger I will do that.
One note, it seems that running on debug logging level makes it a little more unstable. We are back to normal "warning" now and now it seems to be back at our regular "once a day" frequency. With debug it felt like 5 times a day.
-
Hi @patchlings,
Thanks! I'm not surprised that debug exaccerbates the issue, but it's definitely good to know.
Thanks,
Rich -
Now it misbehaves...
Active connections: 6 server accepts handled requests 115659 115659 179524 Reading: 0 Writing: 1 Waiting: 5Accessing feeds/default will show a "There was an error with a connector: The operation has timed out." All other feeds work as expected.
ubuntu@proget:~$ sudo ps huH p 18819 |wc -l 33In the admin interface:
Request URL: https://nuget.org/api/v2/Search()?$top=25&$filter=IsAbsoluteLatestVersion&searchTerm=%27%27&targetFramework=%27%27&includePrerelease=true&semVerLevel=2.0.0 System.Net.WebException: The operation has timed out. at System.Net.HttpWebRequest.RunWithTimeoutWorker[T] (System.Threading.Tasks.Task`1[TResult] workerTask, System.Int32 timeout, System.Action abort, System.Func`1[TResult] aborted, System.Threading.CancellationTokenSource cts) [0x000f8] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Net.HttpWebRequest.EndGetResponse (System.IAsyncResult asyncResult) [0x00020] in <4d8f95b7df544b3fa1a27dda924b4424>:0 at System.Threading.Tasks.TaskFactory`1[TResult].FromAsyncCoreLogic (System.IAsyncResult iar, System.Func`2[T,TResult] endFunction, System.Action`1[T] endAction, System.Threading.Tasks.Task`1[TResult] promise, System.Boolean requiresSynchronization) [0x0000f] in <c453bf849bb84e719dbec0475e99db95>:0 --- End of stack trace from previous location where exception was thrown --- at Inedo.ProGet.Feeds.StrongConnector.GetDirectResponseAsync (System.String url) [0x000eb] in <dacb7de90ce24964b2da21b67ac5e1d1>:0 at Inedo.ProGet.Feeds.StrongConnector.GetCachedResponseAsync (System.String url) [0x000a8] in <dacb7de90ce24964b2da21b67ac5e1d1>:0 at Inedo.ProGet.Feeds.StrongConnector.GetCachedTextReaderAsync (System.String url) [0x00075] in <dacb7de90ce24964b2da21b67ac5e1d1>:0 at Inedo.ProGet.Feeds.NuGet.NuGetFeedClient.PerformRequestWithAbsoluteUrlAsync (System.String fullUrl) [0x000d9] in <dacb7de90ce24964b2da21b67ac5e1d1>:0strace doesn't show anything obvious.
Restart docker container and now the /feed/default shows no problem. nginx status:
Active connections: 6 server accepts handled requests 115829 115829 180229 Reading: 0 Writing: 1 Waiting: 5 -
Hi @patchlings,
Thanks for all the data. I really appreciate your help with this! I'm currently reviewing our code to see if I can find a correlation with this.
Thanks,
Rich
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