自托管的C＃ASP.NET WEB.API应用程序停止响应生产中的HTTP GET / POST操作。我从生产服务器获取了内存转储。 dmp中唯一不寻常的是死线数量相对较多。
截断!Threads输出：
0:000> !Threads
ThreadCount: 116
UnstartedThread: 0
BackgroundThread: 5
PendingThread: 0
DeadThread: 110
Hosted Runtime: no
XXXX 2d 04b87ca0 1019820 Enabled 00000000:00000000 0015e800 0 Ukn (Threadpool Worker)
XXXX 2e 04b87390 1019820 Enabled 00000000:00000000 0015e800 0 Ukn (Threadpool Worker)
XXXX 55 04b86a80 1019820 Enabled 00000000:00000000 0015e800 0 Ukn (Threadpool Worker)
XXXX 53 04b86188 1019820 Enabled 00000000:00000000 0015e800 0 MTA (Threadpool Worker)
XXXX 54 04b858a8 1019820 Enabled 00000000:00000000 0015e800 0 MTA (Threadpool Worker)
该应用有121个System.Threading.Thread个对象：
0:000> !dumpheap -stat -type System.Threading.Thread
total 0 objects
Statistics:
MT Count TotalSize Class Name
79b59b8c 1 20 System.Threading.ThreadHelper
79b9297c 2 64 System.Threading.ThreadStart
79b9ff90 2 168 System.Threading.ThreadAbortException
79ba0128 121 5808 System.Threading.Thread
Total 126 objects
看一些线索，似乎没有任何引用使它们保持活着。示例线程：
0:000> !do 051c5578
Name: System.Threading.Thread
MethodTable: 79ba0128
EEClass: 798d8ed8
Size: 48(0x30) bytes
File: C:\WINDOWS\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll
Fields:
MT Field Offset Type VT Attr Value Name
79b88b84 400077f 4 ....Contexts.Context 0 instance 00000000 m_Context
79b9b5c4 4000780 8 ....ExecutionContext 0 instance 00000000 m_ExecutionContext
79b9fb08 4000781 c System.String 0 instance 00000000 m_Name
79b9ffdc 4000782 10 System.Delegate 0 instance 00000000 m_Delegate
79ba6500 4000783 14 ...ation.CultureInfo 0 instance 00000000 m_CurrentCulture
79ba6500 4000784 18 ...ation.CultureInfo 0 instance 00000000 m_CurrentUICulture
79b9f744 4000785 1c System.Object 0 instance 00000000 m_ThreadStartArg
79b9ab88 4000786 20 System.IntPtr 1 instance 4b77aa0 DONT_USE_InternalThread
79ba2ad4 4000787 24 System.Int32 1 instance 2 m_Priority
79ba2ad4 4000788 28 System.Int32 1 instance 8 m_ManagedThreadId
79b8b878 4000789 18c ...LocalDataStoreMgr 0 shared static s_LocalDataStoreMgr
>> Domain:Value 0015e800:NotInit <<
79b8e434 400078a c ...alDataStoreHolder 0 shared TLstatic s_LocalDataStore
>> Thread:Value <<
检查GC根源：
0:000> !gcroot 051c5578
Note: Roots found on stacks may be false positives. Run "!help gcroot" for
more info.
Scan Thread 0 OSTHread 590
Scan Thread 2 OSTHread 1510
Scan Thread 3 OSTHread c24
Scan Thread 5 OSTHread 14f8
Scan Thread 8 OSTHread 1d48
Scan Thread 9 OSTHread 1e4c
如何继续诊断以找出导致此问题的原因？