c# - HttpWebResponse.GetResponseStream() (似乎)毫无异常(exception)地失败

Question

我一直在想这个问题。在我们的一台客户端(Windows 7、.NET 2.0)机器上，以下代码似乎失败了(导致应用程序关闭)，但似乎没有抛出任何异常。

在日志中打印了“发送休息请求”，然后什么也没有。我的期望是将打印以下日志消息之一(异常之一或信息消息之一)。

查看事件日志显示 Windows 错误报告服务大约在此时启动然后停止，但没有创建转储文件。

如能深入了解可能发生的情况或如何获取更多信息进行调试，我们将不胜感激。谢谢

   try
   {
       System.Net.ServicePointManager.Expect100Continue = false;
       System.Net.ServicePointManager.UseNagleAlgorithm = false;
       HttpWebRequest webRequest = ProxiedHttpWebRequest.CreateWithProxy(web_uri);
       webRequest.Method = request_method;
       if (content_type != null)
       {
           webRequest.ContentType = content_type;
       }
       webRequest.Method = request_method;
       if (data != null)
       {
           webRequest.ContentLength = data.Length;   //Count bytes to send
       }
       else
       {
           webRequest.ContentLength = 0;
       }
       webRequest.KeepAlive = true;
       if (webRequest.Method == "POST")
       {
           //write post data
           using (Stream os = webRequest.GetRequestStream())
           {
                os.Write(data, 0, data.Length);
            }
       }
       if (headers != null)
       {
           foreach (KeyValuePair<string, string> pair in headers)
           {
              webRequest.Headers.Add(pair.Key, pair.Value);
           }
       }
       Logger.Info("Sending rest request");
       using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse())
       {
            if (webResponse != null)
            {
                Logger.Info("received response");
                ResponseCode = webResponse.StatusCode;
                using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
                {
                    string response = sr.ReadToEnd().Trim();
                    return response;
                }
            }
            else
            {
                Logger.Info("a null response was received from the web");
            }
        }
        return null;
    }
    catch (WebException we)
    {
        Logger.Warn(TraceLogger.GenerateErrorStringFromException(we));
        throw we;
    }
    catch (Exception e)
    {
        Logger.Warn(TraceLogger.GenerateErrorStringFromException(e));
        throw e;
    }

编辑:我应该补充说这是一个暂时性错误(它每隔几天就会失败一次，而且只在这台机器上)。代码在 200 多台机器上运行

EDIT2:我还使用以下代码启动代码以捕获未处理的异常:

           // Add the event handler for handling non-UI thread exceptions to the event. 
            AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;

            // Add the event handler for handling UI thread exceptions to the event.
            Application.ThreadException += Application_ThreadException;
            // Set the unhandled exception mode to force all Windows Forms errors to go through
            // our handler.
            Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);

EDIT3:记录。日志记录代码绝对有可能是崩溃的原因。我正在使用非常稳定的 apache 中的 Log4Net 和默认在每次日志请求后刷新的 RollingFileAppender。当日志级别使得警告不会被记录时，也会发生错误。

EDIT4:运行 procdump 后，我能够在程序崩溃时捕获该程序的转储。在 Windbg 中打开它并运行 !analyze -v

FAULTING_IP: 
+ae31be0
00000000`00000000 ??              ???
EXCEPTION_RECORD:  ffffffffffffffff -- (.exr 0xffffffffffffffff)
ExceptionAddress: 0000000000000000
   ExceptionCode: 80000003 (Break instruction exception)
  ExceptionFlags: 00000000
NumberParameters: 0
FAULTING_THREAD:  0000000000001404

PROCESS_NAME:  app_2_0_0_122.exe
ERROR_CODE: (NTSTATUS) 0x80000003 - {EXCEPTION}  Breakpoint  A breakpoint has been reached.
EXCEPTION_CODE: (HRESULT) 0x80000003 (2147483651) - One or more arguments are invalid
MOD_LIST: <ANALYSIS/>
NTGLOBALFLAG:  0
APPLICATION_VERIFIER_FLAGS:  0
MANAGED_STACK: !dumpstack -EE
No export dumpstack found
ADDITIONAL_DEBUG_TEXT:  Followup set based on attribute [Is_ChosenCrashFollowupThread] from Frame:[0] on thread:[PSEUDO_THREAD]
LAST_CONTROL_TRANSFER:  from 000007fef6ebce72 to 0000000076c0933a
DEFAULT_BUCKET_ID:  STACKIMMUNE
PRIMARY_PROBLEM_CLASS:  STACKIMMUNE
BUGCHECK_STR:  APPLICATION_FAULT_STACKIMMUNE_NOSOS_WRONG_SYMBOLS
STACK_TEXT:  
00000000`00000000 00000000`00000000 app_2_0_0+0x0

SYMBOL_NAME:  app_2_0_0
FOLLOWUP_NAME:  MachineOwner
MODULE_NAME: app_2_0_0
IMAGE_NAME:  app_2_0_0
DEBUG_FLR_IMAGE_TIMESTAMP:  0
STACK_COMMAND:  ** Pseudo Context ** ; kb
FAILURE_BUCKET_ID:  STACKIMMUNE_80000003_app_2_0_0!Unloaded
BUCKET_ID:  X64_APPLICATION_FAULT_STACKIMMUNE_NOSOS_WRONG_SYMBOLS_app_2_0_0

编辑:- WindDbg 的输出

0:000> !threads - .. 输出已删除并更正下面的输出

<罢工>0:000> !pe 未找到导出 pe .. 下面是正确的输出

<罢工>0:000> !EEStack -EE 未找到导出 EEStack - 下面是正确的输出

加载 sos 和 clr 并运行 !analyze -v 后，WindDbg 还产生了以下堆栈

STACK_TEXT:  
00000000`0024e6d8 000007fe`f6ebce72 : 00000000`0024f000 00000000`0024e5d1 00000000`00000000 00000000`00000000 : user32!ZwUserWaitMessage+0xa
00000000`0024e6e0 000007fe`f0a1ec14 : 00000000`027f3260 00000000`0024e7c0 000007fe`f095f548 00000000`00000001 : mscorwks!DoNDirectCallWorker+0x62
00000000`0024e770 000007fe`f0a1e278 : 00000000`02857a00 00000000`00000001 00000000`ffffffff 00000000`00000000 : System_Windows_Forms_ni+0x35ec14
00000000`0024e9c0 000007fe`f0a1dce5 : 00000000`027f3260 00000000`ffffffff 00000000`02857998 000007fe`f104cd48 : System_Windows_Forms_ni+0x35e278
00000000`0024eb10 000007ff`001804a5 : 00000000`00000000 00000000`00000000 00000000`0024e888 00000000`0000000c : System_Windows_Forms_ni+0x35dce5
00000000`0024eb70 000007fe`f6ebd432 : 00000000`027f3668 00000000`00000000 000007ff`00033fa8 000007fe`f6d62fa9 : 0x7ff`001804a5
00000000`0024ebf0 000007fe`f6dab7a3 : 00000000`00000002 00000000`00000027 000007fe`f6c77340 00000000`00000000 : mscorwks!CallDescrWorker+0x82
00000000`0024ec40 000007fe`f729a981 : 00000000`0024ed78 00000000`00000000 00000000`0024ef80 00000000`00000008 : mscorwks!CallDescrWorkerWithHandler+0xd3
00000000`0024ece0 000007fe`f6e086db : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`0024f1e0 : mscorwks!MethodDesc::CallDescr+0x2b1
00000000`0024ef20 000007fe`f6e2bd54 : 00000000`00000000 00000000`00000000 0000000d`00d6000a 00000000`00000000 : mscorwks!ClassLoader::RunMain+0x22b
00000000`0024f180 000007fe`f7386c9d : 00000000`0024f7d0 00000000`00000000 00000000`0076bbc8 00000000`00000200 : mscorwks!Assembly::ExecuteMainMethod+0xbc
00000000`0024f470 000007fe`f6e3929f : 00000000`00000000 00000000`00000000 00000000`00000000 000007fe`f6e55c12 : mscorwks!SystemDomain::ExecuteMainMethod+0x47d
00000000`0024fa40 000007fe`f6e1bfdc : ffffffff`fffffffe 00000000`00000000 00009fee`00000000 00000000`00000000 : mscorwks!ExecuteEXE+0x47
00000000`0024fa90 000007fe`f7923309 : ffffffff`ffffffff 00000000`0075dbd0 00000000`00000000 00000000`0024fa98 : mscorwks!CorExeMain+0xac
00000000`0024faf0 000007fe`f7a15b21 : 000007fe`f6e1bf30 000007fe`f79232c0 00000000`00000000 00000000`00000000 : mscoreei!CorExeMain+0x41
00000000`0024fb20 00000000`7677652d : 000007fe`f7920000 00000000`00000000 00000000`00000000 00000000`00000000 : mscoree!CorExeMain_Exported+0x57
00000000`0024fb50 00000000`76e6c541 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0xd
00000000`0024fb80 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x1d

编辑:下面 !pe 的结果。有趣的是，它试图加载的 dll 存在。它是服务和应用程序组件使用的实用程序 dll 的自动生成序列化。

0:000> !pe
Exception object: 0000000002831e48
Exception type: System.BadImageFormatException
Message: Could not load file or assembly 'Utilities_2_0_0_122.XmlSerializers, Version=2.0.0.122, Culture=neutral, PublicKeyToken=0bd8b79f92cc7463' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.
InnerException: System.BadImageFormatException, use !PrintException 00000000028325c0 to see more
StackTrace (generated):
    SP               IP               Function
    000000000024E740 0000000000000001 System.Reflection.Assembly._nLoad(System.Reflection.AssemblyName, System.String, System.Security.Policy.Evidence, System.Reflection.Assembly, System.Threading.StackCrawlMark ByRef, Boolean, Boolean)
    000000000024E740 000007FEF5DEBF61 System.Reflection.Assembly.InternalLoad(System.Reflection.AssemblyName, System.Security.Policy.Evidence, System.Threading.StackCrawlMark ByRef, Boolean)
    000000000024E7D0 000007FEF5E249E4 System.Reflection.Assembly.Load(System.Reflection.AssemblyName)
    000000000024E810 000007FEF42A5C0A System.Xml.Serialization.TempAssembly.LoadGeneratedAssembly(System.Type, System.String, System.Xml.Serialization.XmlSerializerImplementation ByRef)

StackTraceString: <none>
HResult: 8013101b
0:000> !PrintException 00000000028325c0
Exception object: 00000000028325c0
Exception type: System.BadImageFormatException
Message: Could not load file or assembly 'Utilities_2_0_0_122.XmlSerializers, Version=2.0.0.122, Culture=neutral, PublicKeyToken=0bd8b79f92cc7463' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.
InnerException: <none>
StackTrace (generated):
<none>
StackTraceString: <none>
HResult: 8013101b

编辑:根据要求提供 GenerateErrorStringFromException 的来源

    public static string GenerateErrorStringFromException(Exception e)
    {
        try
        {
            string s = "";
            s += "Outer Exception." + "\n";
            s += "ExceptionType: " + e.GetType().Name + "\n";
            s += "Message: " + e.Message + "\n";
            s += "Source: " + e.Source + "\n";
            s += "StackTrace: " + e.StackTrace + "\n";
            s += "TargetSite: " + e.TargetSite + "\n";
            string indent = "\t";
            Exception ie = e;
            while (ie.InnerException != null)
            {
                ie = ie.InnerException;

                s += "Inner Exception." + "\n";
                s += indent + "ExceptionType: " +
                     ie.GetType().Name + "\n";
                s += indent + "Message: " + ie.Message + "\n";
                s += indent + "Source: " + ie.Source + "\n";
                s += indent + "StackTrace: " + ie.StackTrace + "\n";
                s += indent + "TargetSite: " + ie.TargetSite + "\n";

                indent += "\t";
            }
            return s;
        }
        catch (Exception)
        {
            return
                "Fatal problem, an error was generated while printing an exception - no message given on orginal issue ";
        }
    }

编辑:应该早点包含这个。客户端机器是 x64，目标构建是 Any_CPU。客户端安装了 .NET 4.5，目标平台是 .NET 2.0。

编辑:!threads 和 !EEStack -EE 的输出

0:000> !threads
ThreadCount: 8
UnstartedThread: 0
BackgroundThread: 6
PendingThread: 0
DeadThread: 1
Hosted Runtime: no
                                              PreEmptive                                                Lock
       ID OSID        ThreadOBJ     State   GC     GC Alloc Context                  Domain           Count APT Exception
   0    1 1404 000000000075dbd0      6020 Enabled  0000000000000000:0000000000000000 0000000000754c60     0 Ukn System.BadImageFormatException (0000000002831e48)
   2    2 1540 0000000000763bd0      b220 Enabled  0000000000000000:0000000000000000 0000000000754c60     0 Ukn (Finalizer)
   5    3 1ac0 000000001aedff20   880b220 Enabled  0000000002b11a50:0000000002b135c0 0000000000754c60     0 Ukn (Threadpool Completion Port)
   6    4 1530 000000001aee0da0    80a220 Enabled  0000000000000000:0000000000000000 0000000000754c60     0 Ukn (Threadpool Completion Port)
   8    6  41c 000000001c5d4960   180b220 Enabled  0000000000000000:0000000000000000 0000000000754c60     0 Ukn (Threadpool Worker) System.ArgumentException (0000000002a676d8)
  10    5  dfc 000000001ba94600   180b220 Enabled  0000000002b19680:0000000002b1b5c0 0000000000754c60     2 Ukn (Threadpool Worker) System.ArgumentException (0000000002add658)
  14    8 1e6c 000000001c9c2bf0   200b220 Enabled  0000000000000000:0000000000000000 0000000000754c60     1 Ukn
XXXX    7    0 000000001c9b69a0      9820 Enabled  0000000000000000:0000000000000000 0000000000754c60     0 Ukn
0:000> !EEEStack -EE
No export EEEStack found
0:000> !EEStack -EE
---------------------------------------------
Thread   0
Unable to load image C:\Windows\assembly\NativeImages_v2.0.50727_64\System.Windows.Forms\95674cb72317e3a5380ea450b913786f\System.Windows.Forms.ni.dll, Win32 error 0n2
*** WARNING: Unable to verify checksum for System.Windows.Forms.ni.dll
Child-SP         RetAddr          Call Site
000000000024e770 000007fef0a1e278 System_Windows_Forms_ni!System.Windows.Forms.Application+ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32, Int32, Int32)+0x7d4
000000000024e9c0 000007fef0a1dce5 System_Windows_Forms_ni!System.Windows.Forms.Application+ThreadContext.RunMessageLoopInner(Int32, System.Windows.Forms.ApplicationContext)+0x578
000000000024eb10 000007ff001804a5 System_Windows_Forms_ni!System.Windows.Forms.Application+ThreadContext.RunMessageLoop(Int32, System.Windows.Forms.ApplicationContext)+0x65
000000000024eb70 000007fef6ebd432 app_2_0_0_122!app_2_0_0_122.exe!Unknown+0x245
---------------------------------------------
Thread   2
Child-SP         RetAddr          Call Site
---------------------------------------------
Thread   5
Child-SP         RetAddr          Call Site
---------------------------------------------
Thread   6
Child-SP         RetAddr          Call Site
---------------------------------------------
Thread   8
Child-SP         RetAddr          Call Site
---------------------------------------------
Thread  10
*** WARNING: Unable to verify checksum for mscorlib.ni.dll
Child-SP         RetAddr          Call Site
000000001d82e220 000007fef0a1e278 System_Windows_Forms_ni!System.Windows.Forms.Application+ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32, Int32, Int32)+0x7d4
000000001d82e470 000007fef0a1dce5 System_Windows_Forms_ni!System.Windows.Forms.Application+ThreadContext.RunMessageLoopInner(Int32, System.Windows.Forms.ApplicationContext)+0x578
000000001d82e5c0 000007fef109f253 System_Windows_Forms_ni!System.Windows.Forms.Application+ThreadContext.RunMessageLoop(Int32, System.Windows.Forms.ApplicationContext)+0x65
000000001d82e620 000007ff001ac37d System_Windows_Forms_ni!System.Windows.Forms.Form.ShowDialog(System.Windows.Forms.IWin32Window)+0x763
000000001d82e910 000007ff001abce4 app_2_0_0_122!app_2_0_0_122.exe!Unknown+0x4dd
000000001d82ea00 000007ff001ab803 app_2_0_0_122!app_2_0_0_122.exe!Unknown+0x34
000000001d82ea50 000007ff001aaf9c app_2_0_0_122!app_2_0_0_122.exe!Unknown+0x113
000000001d82ead0 000007ff001a8706 app_2_0_0_122!app_2_0_0_122.exe!Unknown+0x23c
000000001d82eb70 000007ff001a85f8 app_2_0_0_122!app_2_0_0_122.exe!Unknown+0x96
000000001d82ebf0 000007fef5dedd38 Utilities_2_0_0_122!Utilities_2_0_0_122.dll!Unknown+0x58
000000001d82ec40 000007fef6ebd432 mscorlib_ni!System.Threading.ExecutionContext.runTryCode(System.Object)+0x178
000000001d82f4e0 000007fef5e2edd6 mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)+0x62
000000001d82f530 000007fef6ebd432 mscorlib_ni!System.Threading._TimerCallback.PerformTimerCallback(System.Object)+0x86
---------------------------------------------
Thread  14
Unable to load image C:\Windows\assembly\NativeImages_v2.0.50727_64\System\af0a0b96a02f9925eb84392ee65a5cfa\System.ni.dll, Win32 error 0n2
*** WARNING: Unable to verify checksum for System.ni.dll
Child-SP         RetAddr          Call Site
000000002202f090 000007fef5104487 mscorlib_ni!System.Threading.WaitHandle.WaitAny(System.Threading.WaitHandle[], Int32, Boolean)+0x64
000000002202f0f0 000007fef5dd2bbb System_ni!System.Net.TimerThread.ThreadProc()+0x327
000000002202f1c0 000007fef5e6aadd mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)+0x9b
000000002202f210 000007fef6ebd432 mscorlib_ni!System.Threading.ThreadHelper.ThreadStart()+0x4d

编辑:procdump 参数 procdump.exe -h -e -t app_2_0_0_122.exe C:\Temp\Dump.dump

它也值得包括 WinDbg 输出的第一行，我假设它是转储的触发器 *** Hung window detected: 180a5c

Answer 1

这一行很奇怪:

ERROR_CODE: (NTSTATUS) 0x80000003 - {EXCEPTION}  Breakpoint  A breakpoint has been reached.

您的记录器代码中有一些 Debugger.Break 或一些 Debug.Assert 吗？