After a while, my server does nothing and yet uses 1 CPU core

[obones]

Hello,

I’ve been observing something strange with one of my RO based server where, after a few days, it eats up one CPU core while it has nothing to do, no clients are there.
Using Process Explorer, I can see that it’s thread $1860 that eats up the CPU core and taking a dump of all threads with madExcept, I get this:

main thread ($1964):
73f3355a +0ea KERNELBASE.dll                 WaitForMultipleObjectsEx
746e8873 +063 user32.dll                     MsgWaitForMultipleObjects
0053e147 +06f MyServer.exe  System.Classes  TThread.WaitFor
0053d32a +046 MyServer.exe  System.Classes  TThread.Destroy
0040a144 +008 MyServer.exe  System          TObject.Free
00669de9 +211 MyServer.exe  Vcl.SvcMgr      TServiceApplication.Run
0066a783 +007 MyServer.exe  uROComboService TROService.Run
00bf92d4 +0d8 MyServer.exe  MyServer       initialization
745162c2 +022 KERNEL32.DLL                   BaseThreadInitThunk

thread $bb4 (TROThreadTimer):
73f3355a +0ea KERNELBASE.dll                        WaitForMultipleObjectsEx
008de405 +0d9 MyServer.exe  uIPAsyncSocket         TIPBaseAsyncSocket.BeginSend
00410390 +010 MyServer.exe  System                 @IntfClear
0040dc4c +0e4 MyServer.exe  System                 @FinalizeArray
0040db3c +024 MyServer.exe  System                 @FinalizeRecord
00410390 +010 MyServer.exe  System                 @IntfClear
008d549e +1ae MyServer.exe  uROBaseSuperHttpServer TROBaseSuperHTTPServer.cbCleanup
0059bae6 +056 MyServer.exe  System.SyncObjs        THandleObject.WaitFor
006e3545 +00d MyServer.exe  uROThreadTimer         TROThreadTimer.IntExecute
006e2f4b +07f MyServer.exe  uROInitializedThread   TROInitializedThread.Execute
004b02f3 +02b MyServer.exe  madExcept              HookedTThreadExecute
0053d129 +049 MyServer.exe  System.Classes         ThreadProc
0040beac +028 MyServer.exe  System                 ThreadWrapper
004b01d9 +00d MyServer.exe  madExcept              CallThreadProcSafe
004b023e +032 MyServer.exe  madExcept              ThreadExceptFrame
745162c2 +022 KERNEL32.DLL                          BaseThreadInitThunk
>> created by main thread ($1964) at:
006e2eac +020 MyServer.exe  uROInitializedThread   TROInitializedThread.Create

thread $12fc (TIPSocketWorkerThread):
76b4497c +0bc ws2_32.dll                         select
008df9fa +23a MyServer.exe uIPAsyncSocket       TIPSocketWorkerThread.IntExecute
006e2f4b +07f MyServer.exe uROInitializedThread TROInitializedThread.Execute
004b02f3 +02b MyServer.exe madExcept            HookedTThreadExecute
0053d129 +049 MyServer.exe System.Classes       ThreadProc
0040beac +028 MyServer.exe System               ThreadWrapper
004b01d9 +00d MyServer.exe madExcept            CallThreadProcSafe
004b023e +032 MyServer.exe madExcept            ThreadExceptFrame
745162c2 +022 KERNEL32.DLL                       BaseThreadInitThunk
>> created by main thread ($1964) at:
006e2eac +020 MyServer.exe uROInitializedThread TROInitializedThread.Create

thread $158c (TIdUDPListenerThread):
76b4497c +bc ws2_32.dll                   select
008423ba +4a MyServer.exe IdStackWindows TIdSocketListWindows.FDSelect
00842358 +20 MyServer.exe IdStackWindows TIdSocketListWindows.SelectRead
00849cea +06 MyServer.exe IdSocketHandle TIdSocketHandle.Select
0089b3ef +2b MyServer.exe IdUDPServer    TIdUDPListenerThread.Run
0085f0cd +f5 MyServer.exe IdThread       TIdThread.Execute
004b02f3 +2b MyServer.exe madExcept      HookedTThreadExecute
0053d129 +49 MyServer.exe System.Classes ThreadProc
0040beac +28 MyServer.exe System         ThreadWrapper
004b01d9 +0d MyServer.exe madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                 BaseThreadInitThunk
>> created by main thread ($1964) at:
0085f2ce +52 MyServer.exe IdThread       TIdThread.Create

thread $1530 (TIdUDPListenerThread):
76b4497c +bc ws2_32.dll                   select
008423ba +4a MyServer.exe IdStackWindows TIdSocketListWindows.FDSelect
00842358 +20 MyServer.exe IdStackWindows TIdSocketListWindows.SelectRead
00849cea +06 MyServer.exe IdSocketHandle TIdSocketHandle.Select
0089b3ef +2b MyServer.exe IdUDPServer    TIdUDPListenerThread.Run
0085f0cd +f5 MyServer.exe IdThread       TIdThread.Execute
004b02f3 +2b MyServer.exe madExcept      HookedTThreadExecute
0053d129 +49 MyServer.exe System.Classes ThreadProc
0040beac +28 MyServer.exe System         ThreadWrapper
004b01d9 +0d MyServer.exe madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                 BaseThreadInitThunk
>> created by main thread ($1964) at:
0085f2ce +52 MyServer.exe IdThread       TIdThread.Create

thread $7a4 (TServiceStartThread):
73f25e83 +93 KERNELBASE.dll                WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                WaitForSingleObject
73cca0a7 +57 sechost.dll                   StartServiceCtrlDispatcherW
00669bbb +07 MyServer.exe  Vcl.SvcMgr     TServiceStartThread.Execute
004b02f3 +2b MyServer.exe  madExcept      HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes ThreadProc
0040beac +28 MyServer.exe  System         ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                  BaseThreadInitThunk
>> created by main thread ($1964) at:
00669b50 +54 MyServer.exe  Vcl.SvcMgr     TServiceStartThread.Create

thread $1644:
73f25e83 +93 KERNELBASE.dll                WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                WaitForSingleObject
0053e174 +9c MyServer.exe  System.Classes TThread.WaitFor
00668ed1 +75 MyServer.exe  Vcl.SvcMgr     TService.DoStart
00668dfd +95 MyServer.exe  Vcl.SvcMgr     TService.Main
00669307 +83 MyServer.exe  Vcl.SvcMgr     TServiceApplication.DispatchServiceMain
00669112 +0e MyServer.exe  Vcl.SvcMgr     ServiceMain
004b01d9 +0d MyServer.exe  madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                  BaseThreadInitThunk
>> created by thread $7a4 (TServiceStartThread) at:
73cdce41 +00 sechost.dll

thread $19b0 (TServiceThread):
746fa746 +26 user32.dll                   GetMessageW
00668618 +48 MyServer.exe Vcl.SvcMgr     TServiceThread.ProcessRequests
00668495 +f1 MyServer.exe Vcl.SvcMgr     TServiceThread.Execute
004b02f3 +2b MyServer.exe madExcept      HookedTThreadExecute
0053d129 +49 MyServer.exe System.Classes ThreadProc
0040beac +28 MyServer.exe System         ThreadWrapper
004b01d9 +0d MyServer.exe madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                 BaseThreadInitThunk
>> created by thread $1644 at:
00668383 +1b MyServer.exe Vcl.SvcMgr     TServiceThread.Create

thread $7a0 (TIPSocketWorkerThread):
73f3355a +0ea KERNELBASE.dll                      WaitForMultipleObjectsEx
0059bae6 +056 MyServer.exe  System.SyncObjs      THandleObject.WaitFor
008df9ca +20a MyServer.exe  uIPAsyncSocket       TIPSocketWorkerThread.IntExecute
006e2f4b +07f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +02b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +049 MyServer.exe  System.Classes       ThreadProc
0040beac +028 MyServer.exe  System               ThreadWrapper
004b01d9 +00d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +032 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +022 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $12fc (TIPSocketWorkerThread) at:
006e2eac +020 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $b40 (TROPooledThread):
73f25e83 +93 KERNELBASE.dll                      WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                      WaitForSingleObject
008cebc7 +0b MyServer.exe  uROThreadPool        TROSemaphore.WaitFor
008ce58c +38 MyServer.exe  uROThreadPool        TROPooledThread.IntExecute
006e2f4b +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $12fc (TIPSocketWorkerThread) at:
006e2eac +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $12a0 (TROThreadTimer):
73f3355a +ea KERNELBASE.dll                      WaitForMultipleObjectsEx
00410390 +10 MyServer.exe  System               @IntfClear
007d7fd5 +71 MyServer.exe  uROSessions          TROCustomSessionManager.DoNotifySessionsChangesListener
0040a81d +1d MyServer.exe  System               @AfterConstruction
004affb5 +19 MyServer.exe  madExcept            InterceptClassDestroy
0040a135 +09 MyServer.exe  System               TObject.Destroy
007d83b2 +7a MyServer.exe  uROSessions          TROInMemorySessionManager.DoClearSessions
007d739a +5a MyServer.exe  uROSessions          TROCustomSessionManager.ClearSessions
0059bae6 +56 MyServer.exe  System.SyncObjs      THandleObject.WaitFor
006e3545 +0d MyServer.exe  uROThreadTimer       TROThreadTimer.IntExecute
006e2f4b +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $b40 (TROPooledThread) at:
006e2eac +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $19e4 (TROPooledThread):
73f25e83 +93 KERNELBASE.dll                      WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                      WaitForSingleObject
008cebc7 +0b MyServer.exe  uROThreadPool        TROSemaphore.WaitFor
008ce58c +38 MyServer.exe  uROThreadPool        TROPooledThread.IntExecute
006e2f4b +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $12fc (TIPSocketWorkerThread) at:
006e2eac +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $15fc (TROPooledThread):
73f25e83 +93 KERNELBASE.dll                      WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                      WaitForSingleObject
008cebc7 +0b MyServer.exe  uROThreadPool        TROSemaphore.WaitFor
008ce58c +38 MyServer.exe  uROThreadPool        TROPooledThread.IntExecute
006e2f4b +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $7a0 (TIPSocketWorkerThread) at:
006e2eac +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $1674 (TROPooledThread):
73f25e83 +93 KERNELBASE.dll                      WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                      WaitForSingleObject
008cebc7 +0b MyServer.exe  uROThreadPool        TROSemaphore.WaitFor
008ce58c +38 MyServer.exe  uROThreadPool        TROPooledThread.IntExecute
006e2f4b +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $12fc (TIPSocketWorkerThread) at:
006e2eac +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $1404 (TROPooledThread):
73f25e83 +93 KERNELBASE.dll                      WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                      WaitForSingleObject
008cebc7 +0b MyServer.exe  uROThreadPool        TROSemaphore.WaitFor
008ce58c +38 MyServer.exe  uROThreadPool        TROPooledThread.IntExecute
006e2f4b +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $12fc (TIPSocketWorkerThread) at:
006e2eac +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $12c4 (TROPooledThread):
73f25e83 +93 KERNELBASE.dll                      WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                      WaitForSingleObject
008cebc7 +0b MyServer.exe  uROThreadPool        TROSemaphore.WaitFor
008ce58c +38 MyServer.exe  uROThreadPool        TROPooledThread.IntExecute
006e2f4b +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $12fc (TIPSocketWorkerThread) at:
006e2eac +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $1860 (TIPSocketWorkerThread):
0059bdec +04 MyServer.exe System.SyncObjs      TEvent.ResetEvent
006e2f4b +7f MyServer.exe uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe System.Classes       ThreadProc
0040beac +28 MyServer.exe System               ThreadWrapper
004b01d9 +0d MyServer.exe madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                       BaseThreadInitThunk
>> created by thread $12fc (TIPSocketWorkerThread) at:
006e2eac +20 MyServer.exe uROInitializedThread TROInitializedThread.Create

thread $18f4:
745162c2 +22 KERNEL32.DLL  BaseThreadInitThunk

thread $1554:
745162c2 +22 KERNEL32.DLL  BaseThreadInitThunk

Repeating the snapshot, I always get the same result, so it seems as if the $1860 thread is stuck inside some loop invoking TEvent.ResetEvent continuously.

If I restart the service, the CPU usage goes back to 0% for a few days, and the same snapshot gives this:

main thread ($1f70):
0065e829 +149 MyServer.exe Vcl.Forms       TApplication.Idle
0065da4f +017 MyServer.exe Vcl.Forms       TApplication.HandleMessage
00669d5b +183 MyServer.exe Vcl.SvcMgr      TServiceApplication.Run
0066a783 +007 MyServer.exe uROComboService TROService.Run
00bfa31c +0d8 MyServer.exe MyServer       initialization
745162c2 +022 KERNEL32.DLL                  BaseThreadInitThunk

thread $3b8:
745162c2 +22 KERNEL32.DLL  BaseThreadInitThunk

thread $bdc:
745162c2 +22 KERNEL32.DLL  BaseThreadInitThunk

thread $1eb8:
745162c2 +22 KERNEL32.DLL  BaseThreadInitThunk

thread $de8 (TROThreadTimer):
73f3355a +ea KERNELBASE.dll                      WaitForMultipleObjectsEx
0059bae6 +56 MyServer.exe  System.SyncObjs      THandleObject.WaitFor
006e3569 +0d MyServer.exe  uROThreadTimer       TROThreadTimer.IntExecute
006e2f6f +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by main thread ($1f70) at:
006e2ed0 +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $1128 (TIPSocketWorkerThread):
76b4497c +0bc ws2_32.dll                         select
008dfa1e +23a MyServer.exe uIPAsyncSocket       TIPSocketWorkerThread.IntExecute
006e2f6f +07f MyServer.exe uROInitializedThread TROInitializedThread.Execute
004b02f3 +02b MyServer.exe madExcept            HookedTThreadExecute
0053d129 +049 MyServer.exe System.Classes       ThreadProc
0040beac +028 MyServer.exe System               ThreadWrapper
004b01d9 +00d MyServer.exe madExcept            CallThreadProcSafe
004b023e +032 MyServer.exe madExcept            ThreadExceptFrame
745162c2 +022 KERNEL32.DLL                       BaseThreadInitThunk
>> created by main thread ($1f70) at:
006e2ed0 +020 MyServer.exe uROInitializedThread TROInitializedThread.Create

thread $1db8 (TIdUDPListenerThread):
76b4497c +bc ws2_32.dll                   select
00835783 +cb MyServer.exe IdWinsock2     Stub_select
008423de +4a MyServer.exe IdStackWindows TIdSocketListWindows.FDSelect
0084237c +20 MyServer.exe IdStackWindows TIdSocketListWindows.SelectRead
00849d0e +06 MyServer.exe IdSocketHandle TIdSocketHandle.Select
0089b413 +2b MyServer.exe IdUDPServer    TIdUDPListenerThread.Run
0085f0f1 +f5 MyServer.exe IdThread       TIdThread.Execute
004b02f3 +2b MyServer.exe madExcept      HookedTThreadExecute
0053d129 +49 MyServer.exe System.Classes ThreadProc
0040beac +28 MyServer.exe System         ThreadWrapper
004b01d9 +0d MyServer.exe madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                 BaseThreadInitThunk
>> created by main thread ($1f70) at:
0085f2f2 +52 MyServer.exe IdThread       TIdThread.Create

thread $708 (TIdUDPListenerThread):
76b4497c +bc ws2_32.dll                   select
008423de +4a MyServer.exe IdStackWindows TIdSocketListWindows.FDSelect
0084237c +20 MyServer.exe IdStackWindows TIdSocketListWindows.SelectRead
00849d0e +06 MyServer.exe IdSocketHandle TIdSocketHandle.Select
0089b413 +2b MyServer.exe IdUDPServer    TIdUDPListenerThread.Run
0085f0f1 +f5 MyServer.exe IdThread       TIdThread.Execute
004b02f3 +2b MyServer.exe madExcept      HookedTThreadExecute
0053d129 +49 MyServer.exe System.Classes ThreadProc
0040beac +28 MyServer.exe System         ThreadWrapper
004b01d9 +0d MyServer.exe madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                 BaseThreadInitThunk
>> created by main thread ($1f70) at:
0085f2f2 +52 MyServer.exe IdThread       TIdThread.Create

thread $50 (TServiceStartThread):
73f25e83 +93 KERNELBASE.dll                WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                WaitForSingleObject
73cca0a7 +57 sechost.dll                   StartServiceCtrlDispatcherW
00669bbb +07 MyServer.exe  Vcl.SvcMgr     TServiceStartThread.Execute
004b02f3 +2b MyServer.exe  madExcept      HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes ThreadProc
0040beac +28 MyServer.exe  System         ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                  BaseThreadInitThunk
>> created by main thread ($1f70) at:
00669b50 +54 MyServer.exe  Vcl.SvcMgr     TServiceStartThread.Create

thread $147c:
73f25e83 +93 KERNELBASE.dll                WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                WaitForSingleObject
0053e174 +9c MyServer.exe  System.Classes TThread.WaitFor
00668ed1 +75 MyServer.exe  Vcl.SvcMgr     TService.DoStart
00668dfd +95 MyServer.exe  Vcl.SvcMgr     TService.Main
00669307 +83 MyServer.exe  Vcl.SvcMgr     TServiceApplication.DispatchServiceMain
00669112 +0e MyServer.exe  Vcl.SvcMgr     ServiceMain
004b01d9 +0d MyServer.exe  madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                  BaseThreadInitThunk
>> created by thread $50 (TServiceStartThread) at:
73cdce41 +00 sechost.dll

thread $1b8c (TServiceThread):
746fa746 +26 user32.dll                   GetMessageW
00668618 +48 MyServer.exe Vcl.SvcMgr     TServiceThread.ProcessRequests
00668495 +f1 MyServer.exe Vcl.SvcMgr     TServiceThread.Execute
004b02f3 +2b MyServer.exe madExcept      HookedTThreadExecute
0053d129 +49 MyServer.exe System.Classes ThreadProc
0040beac +28 MyServer.exe System         ThreadWrapper
004b01d9 +0d MyServer.exe madExcept      CallThreadProcSafe
004b023e +32 MyServer.exe madExcept      ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                 BaseThreadInitThunk
>> created by thread $147c at:
00668383 +1b MyServer.exe Vcl.SvcMgr     TServiceThread.Create

thread $1ea8 (TROPooledThread):
73f25e83 +93 KERNELBASE.dll                      WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                      WaitForSingleObject
008cebeb +0b MyServer.exe  uROThreadPool        TROSemaphore.WaitFor
008ce5b0 +38 MyServer.exe  uROThreadPool        TROPooledThread.IntExecute
006e2f6f +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $1128 (TIPSocketWorkerThread) at:
006e2ed0 +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $1e8 (TROThreadTimer):
73f3355a +ea KERNELBASE.dll                      WaitForMultipleObjectsEx
0059bae6 +56 MyServer.exe  System.SyncObjs      THandleObject.WaitFor
006e3569 +0d MyServer.exe  uROThreadTimer       TROThreadTimer.IntExecute
006e2f6f +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $1ea8 (TROPooledThread) at:
006e2ed0 +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

thread $1ebc (TROPooledThread):
73f25e83 +93 KERNELBASE.dll                      WaitForSingleObjectEx
73f25ddd +0d KERNELBASE.dll                      WaitForSingleObject
008cebeb +0b MyServer.exe  uROThreadPool        TROSemaphore.WaitFor
008ce5b0 +38 MyServer.exe  uROThreadPool        TROPooledThread.IntExecute
006e2f6f +7f MyServer.exe  uROInitializedThread TROInitializedThread.Execute
004b02f3 +2b MyServer.exe  madExcept            HookedTThreadExecute
0053d129 +49 MyServer.exe  System.Classes       ThreadProc
0040beac +28 MyServer.exe  System               ThreadWrapper
004b01d9 +0d MyServer.exe  madExcept            CallThreadProcSafe
004b023e +32 MyServer.exe  madExcept            ThreadExceptFrame
745162c2 +22 KERNEL32.DLL                        BaseThreadInitThunk
>> created by thread $1128 (TIPSocketWorkerThread) at:
006e2ed0 +20 MyServer.exe  uROInitializedThread TROInitializedThread.Create

In this case, all threads are doing nothing but wait for external events to occur.
Is this something that you have already seen?
What should I be trying, looking at to pinpoint the origin of this issue?

A few technical details:

ROSDK 9.4 (yeah, I know, an update is long overdue)
ROBroadcastServer + RODiscoveryServer
ROIpSuperHTTPServer
BinMessage
AESEnveloppe
Windows 2016 x64 build 14393

Any pointers are most welcome.

[mh (marc hoffman)]

@obones

ROSDK 9.4 (yeah, I know, an update is long overdue)

@obones

Any pointers are most welcome.

My first pointer, TBH, would indeed be to update

[obones]

@mh

My first pointer, TBH, would indeed be to update

Yes, it’s on the table, but I would really like to have a firm understanding as to why this “lock up” happens before doing the update. There are always rough edges when doing an update.

[EvgenyK (Evgeny Karpov)]

Hi,

it could be some issue with synapse superhttp server and how it works with sockets.
in v10 we created servers (http, superhttp, tcp, supertcp) w/o using 3rd party libraries like indy/synapse. they may work more stable in some scenarios.

can you test your project with ROD v10?