在我们的应用程序中，我们目前正在移动到System.Threading.Tasks.Dataflow来管理所有通信。但是现在每次我们在任何自定义SynchronizationContext中使用我们的网络客户端/服务器类时，我们都会得到一个异常。
"System.Threading。ExecutionContext不实现接口System.IDisposable"。
我不明白这怎么可能。我们从不改变或玩弄任何线程执行上下文。最接近它的是
SynchronizationContext.SetSynchronizationContext (new GtkSynchronizationContext ());
Scheduler = TaskScheduler.FromCurrentSynchronizationContext ();
Factory = new TaskFactory (Scheduler);
我不明白为什么自定义SynchronizationContext会使DataFlow这样崩溃。下面是导致DataFlow异常的应用程序的输出。
madrang@Qosmio-X770:~$ '/home/madrang/WorkSpace/linsft/Source/Invensys/Build/runbuild'
Engine Initialize started
==============================================================================
Application Information
------------------------------------------------------------------------------
Program : /home/madrang/WorkSpace/linsft/Source/Invensys/Build/Bin/Linsft.Engine.dll
Time : 14/04/2013 04:46:02
User : madrang
Computer : Qosmio-X770
OS : Linux64
Processors : 8
Working Set : 0
Framework : 4.0.30319.1
Run Time : 00:00:01.6015700
------------------------------------------------------------------------------
Loaded Modules
------------------------------------------------------------------------------
/usr/bin/mono||0
/usr/bin/mono||3031040
/usr/lib/mono/gac/Mono.Posix/4.0.0.0__0738eb9f132ed756/Mono.Posix.dll|4.0.0.0|188416
/usr/lib/mono/gac/System.Runtime.Serialization/3.0.0.0__b77a5c561934e089/System.Runtime.Serialization.dll|3.0.0.0|196608
/usr/lib/mono/gac/System.ServiceModel/3.0.0.0__b77a5c561934e089/System.ServiceModel.dll|3.0.0.0|1396736
/usr/lib/mono/gac/System/4.0.0.0__b77a5c561934e089/System.dll|4.0.0.0|1748992
/usr/lib/mono/gac/System.Xml/4.0.0.0__b77a5c561934e089/System.Xml.dll|4.0.0.0|1273856
/usr/lib/mono/gac/System.Core/4.0.0.0__b77a5c561934e089/System.Core.dll|4.0.0.0|798720
/home/madrang/WorkSpace/linsft/Source/Invensys/Build/Bin/NLog.dll|2.0.0.0|319488
/home/madrang/WorkSpace/linsft/Source/Invensys/Build/Bin/Mono.Addins.dll|1.0.0.0|237568
/home/madrang/WorkSpace/linsft/Source/Invensys/Build/Bin/Mono.Addins.Setup.dll|1.0.0.0|131072
/lib/x86_64-linux-gnu/libnss_files-2.17.so||49152
/lib/x86_64-linux-gnu/libnss_nis-2.17.so||45056
/lib/x86_64-linux-gnu/libnsl-2.17.so||94208
/lib/x86_64-linux-gnu/libnss_compat-2.17.so||32768
/usr/lib/mono/4.0/mscorlib.dll|4.0.0.0|2867200
/usr/lib/locale/locale-archive||2920448
/lib/x86_64-linux-gnu/libc-2.17.so||1826816
/lib/x86_64-linux-gnu/libpthread-2.17.so||98304
/lib/x86_64-linux-gnu/libdl-2.17.so||12288
/lib/x86_64-linux-gnu/librt-2.17.so||28672
/lib/x86_64-linux-gnu/libm-2.17.so||1060864
/lib/x86_64-linux-gnu/ld-2.17.so||143360
/usr/lib/mono/gac/System.Configuration/4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll|4.0.0.0|126976
/home/madrang/WorkSpace/linsft/Source/Invensys/Build/Bin/Linsft.Engine.dll|0.5.4849.6350|36864
/home/madrang/WorkSpace/linsft/Source/Invensys/Build/Invensys.exe|1.0.4845.22748|8192
/run/shm/mono.8910||4096
------------------------------------------------------------------------------
Loaded Assembly
------------------------------------------------------------------------------
Mono.Posix, 4.0.0.0
System.Runtime.Serialization, 3.0.0.0
System.ServiceModel, 3.0.0.0
System, 4.0.0.0
System.Configuration, 4.0.0.0
System.Xml, 4.0.0.0
System.Core, 4.0.0.0
NLog, 2.0.0.0
Mono.Addins, 1.0.0.0
Mono.Addins.Setup, 1.0.0.0
Linsft.Engine, 0.5.4849.6350
Invensys, 1.0.4845.22748
mscorlib, 4.0.0.0
==============================================================================
Registed new scheduler: ThreadPool
Addin Loaded: Linsft.Engine
Assembly Loaded ICSharpCode.SharpZipLib, 2.84.0.0
Assembly Loaded Mono.Addins.CecilReflector, 1.0.0.0
Assembly Loaded Mono.CSharp, 4.0.0.0
Assembly Loaded NLog.Extended, 2.0.0.0
Assembly Loaded xunit, 1.9.1.1600
Assembly Loaded xunit.extensions, 1.9.1.1600
Assembly Loaded xunit.runner.utility, 1.9.1.1600
Addin Loaded: Linsft.Invensys
Starting new task in default scheduler: Linsft.CommandExtensionNode: Id=Linsft.Core.IdleScheduler.Initialize, Linsft.Core.IdleScheduler.Initialize()
Assembly Loaded Linsft.Core, 1.0.4850.6090
Assembly Loaded Linsft.Configuration, 0.0.0.1
Assembly Loaded Linsft.Network, 0.0.0.1
Assembly Loaded Linsft.Storage, 0.0.0.1
Assembly Loaded Linsft.Validator.Base, 1.0.0.22749
Assembly Loaded System.Threading.Tasks.Dataflow, 0.0.4303.21337
Assembly Loaded Ionic.Zip.Reduced, 1.9.1.8
Assembly Loaded Linsft.Helper, 1.0.4845.22748
Addin Loaded: Linsft.Core
Idle Scheduler Initialize
Idle Scheduler Started
Registed new scheduler: Idle
Starting pending task for: Idle
Scheduler Idle loaded, unlock Initialize
Assembly Loaded Mono.Security, 4.0.0.0
Starting new task in default scheduler: Linsft.CommandExtensionNode: Id=Linsft.Core.Gui.InitializeGtk, Linsft.Core.Gui.GtkScheduler.Initialize()
Addin Loaded: Linsft.Core.Gui
Assembly Loaded atk-sharp, 3.0.0.0
Assembly Loaded cairo-sharp, 1.10.0.0
Assembly Loaded gdk-sharp, 3.0.0.0
Assembly Loaded gio-sharp, 3.0.0.0
Assembly Loaded glib-sharp, 3.0.0.0
Assembly Loaded gtk-dotnet, 3.0.0.0
Assembly Loaded gtk-sharp, 3.0.0.0
Assembly Loaded pango-sharp, 3.0.0.0
Assembly Loaded Linsft.Core.Gui, 1.0.4850.6091
Gtk Scheduler Initialize
Scheduler not loaded, Will be started later: Linsft.CommandExtensionNode: Id=Linsft.Core.Gui.ShowMainWindow, Scheduler=Gtk, Linsft.Core.Gui.MainWindow.ShowWindow()
Gtk Scheduler Started
Starting new task in default scheduler: Linsft.CommandExtensionNode: Id=Linsft.Commander.Initialize, Linsft.Commander.Terminal.Initialize()
Addin Loaded: Linsft.Commander
Assembly Loaded Linsft.Commander, 1.0.4852.8576
Telnet server started: [ServicePoint: Address=tcp://127.0.0.1:8090/, ConnectionName=tcp, ConnectTimeout=15000, Port=8090]
Registed new scheduler: Gtk
Starting pending task for: Gtk
Building ExtendedWindow
Completed Building ExtendedWindow
Building MainWindow
Linsft.Core Opening Configuration Storage
Opening Container, Class=Linsft.Core.Configuration, Method=.cctor
Linsft.Core Configuration Loaded Sucessfully
MainWindow Width=800, Height=600
MainWindow X=65, Y=24
Completed Building MainWindow
Engine Initialize completed
TcpConnectionListener Connection Request: [ServicePoint: Address=tcp://127.0.0.1:8090/, ConnectionName=tcp, ConnectTimeout=15000, Port=8090]
Telnet client connected: [ServicePoint: Address=tcp://127.0.0.1:43544/, ConnectionName=tcp, ConnectTimeout=15000, Port=43544]
TcpConnectionListener received a new connection: [ServicePoint: Address=tcp://127.0.0.1:43544/, ConnectionName=tcp, ConnectTimeout=15000, Port=43544]
System.Threading.ExecutionContext doesn't implement interface System.IDisposable
Stacktrace:
at System.Threading.Tasks.Dataflow.Internal.Common.CreateCopyAndRun (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) <0x00071>
at System.Threading.Tasks.Dataflow.Internal.Common.InvokeCallbackWithContext (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) <0x0003b>
at System.Threading.Tasks.Dataflow.Internal.TargetCore`1.ProcessMessagesLoopWithExecutionContext () <0x0011f>
at System.Threading.Tasks.Dataflow.Internal.TargetCore`1.<ProcessAsyncIfNecessary_Slow>b__3 (object) <0x00033>
at System.Threading.Tasks.TaskActionInvoker/ActionObjectInvoke.Invoke (System.Threading.Tasks.Task,object,System.Threading.Tasks.Task) <0x00023>
at System.Threading.Tasks.Task.InnerInvoke () <0x0005c>
at System.Threading.Tasks.Task.ThreadStart () <0x001cf>
at System.Threading.Tasks.Task.Execute () <0x0000f>
at System.Threading.Tasks.TpScheduler.TaskExecuterCallback (object) <0x0004b>
at (wrapper runtime-invoke) <Module>.runtime_invoke_void__this___object (object,intptr,intptr,intptr) <0xffffffff>
Native stacktrace:
mono() [0x4961e9]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xfbd0) [0x7fbd34914bd0]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x37) [0x7fbd34574037]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x148) [0x7fbd34577698]
mono() [0x5cdd7f]
mono() [0x5cde02]
mono() [0x497eaf]
mono() [0x4985c4]
[0x41751bba]
Debug info from gdb:
Could not attach to process. If your uid matches the uid of the target
process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf
ptrace: Operation not permitted.
No threads.
=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================
/home/madrang/WorkSpace/linsft/Source/Invensys/Build/invensys: line 5: 8910 Aborted (core dumped) mono "$INVENSYSDIR/Invensys.exe"
在Mono上运行
madrang@Qosmio-X770:~$ mono --version
Mono JIT compiler version 2.10.8.1 (Debian 2.10.8.1-5ubuntu1)
Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: amd64
Disabled: none
Misc: softdebug
LLVM: supported, not enabled.
GC: Included Boehm (with typed GC and Parallel Mark)
任何想法都是受欢迎的，因为我现在开始了第二周的阅读文档和代码，试图找到解决这个问题的方法。
谢谢,Madrang
我的怀疑是，不知何故你引用了一个版本的ExecutionContext是pre-。NET 4.0。你会注意到，在。net 4.0之前，ExecutionContext没有实现IDisposable:
http://msdn.microsoft.com/en-us/library/system.threading.executioncontext (v =应用程序). aspx
上面的显示您正在使用。net 4.0，但是无论如何您可以想到如何在您的应用程序中引入旧版本的ExecutionContext吗?你是否碰巧在使用。net 3.5反向移植的System.Threading.dll?响应式扩展?
我不是mono的用户，但是mono的ExecutionContext实现了。net 4.0的IDisposable吗我检查过了)?看看这个:https://github.com/mono/mono/blob/master/mcs/class/corlib/System.Threading/ExecutionContext.cs
它显示它有，但我不知道你正在使用的mono当前版本是否有该代码。
应该等....我的一个同事找到了一个非常简单的解决方法。
madrang@Qosmio-X770:~$ /opt/mono-3/bin/mono --version
Mono JIT compiler version 3.0.7 (tarball Sat Mar 30 14:45:04 UTC 2013)
Copyright (C) 2002-2012 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: amd64
Disabled: none
Misc: softdebug
LLVM: supported, not enabled.
GC: Included Boehm (with typed GC and Parallel Mark)
现在在mono 3下运行，它工作得很好。这可能是最新的mono 2版本的bug