.net – System.Diagnostics.EventLog – 连接到系统的设备无法运行

我做了一些谷歌,没有任何“设备附加”错误与事件日志有任何关系.我也在Micosoft fourm发布了问题,但没有回复.以为我会给你们一个机会.这里是问题的链接. https://social.msdn.microsoft.com/Forums/en-US/d484d9dc-d9eb-4d19-97b8-9ae4db63e041/systemdiagnosticseventlog-a-device-attached-to-the-system-is-not-functioning?forum=netfxbcl

这是错误消息：

System.ComponentModel.Win32Exception was caught
  ErrorCode=-2147467259
  HResult=-2147467259
  Message=A device attached to the system is not functioning
  NativeErrorCode=31
  Source=System
  StackTrace:
       at System.Diagnostics.EventLogInternal.InternalWriteEvent(UInt32 eventID,UInt16 category,EventLogEntryType type,String[] strings,Byte[] rawData,String currentMachineName)
       at System.Diagnostics.EventLogInternal.WriteEntry(String message,Int32 eventID,Int16 category,Byte[] rawData)
       at System.Diagnostics.EventLog.WriteEntry(String message,EventLogEntryType type)
       at VB_Braums_ClassLib.LogIt.WriteEventLog(String Entry,EventLogEntryType eventType,String Source) in Corp01Vol1MisPccodeMs.netProductionLibsProductionLibsProdLibCommon.vb:line 3666
  InnerException:

这段代码在库中,所以我创建了一个“hello world”来演示这个问题.我会在最后发布.这个.net 4框架已经在我们的代码中存在了一段时间.我们开始从XP升级到Win 7.基本上,事件日志大小限制为32667号码.所以我们进行了测试,如果字符串大于那个,那么我们将把它写成32000字节的卡盘.在两个不同的win7框中,我们收到“设备附加”错误消息.在XP机器上运行相同的代码,它的工作原理.哦,Win 7盒子是64位.我想知道胜利7 32位是否会有同样的问题？其他人可以复制它吗？ tmpsize似乎是不同的数字,但如果你玩它,你可以把它降到数字x作品和(x 1)没有.介于30000和32000之间.从大多数snighfict价值开始并向下移动,我打赌它在31000 – 31900范围内.

Module Module1
    Sub Main()

        Dim logName As String = "BraumsLog"
        Dim objEventLog As New System.Diagnostics.EventLog()
        Dim needCreate As Boolean = False
        Dim Source As String = ""
        If Source.Length = 0 Then Source = "Test"
        Dim Entry As String = "".PadLeft(64000,"1"c)

        'Register the App as an Event Source
        If EventLog.SourceExists(Source) Then
            Dim slog As String = EventLog.LogNameFromSourceName(Source,".")
            If slog <> logName Then EventLog.DeleteEventSource(Source) : needCreate = True
        Else
            needCreate = True
        End If

        If needCreate Then EventLog.CreateEventSource(Source,logName)
        objEventLog.Source = Source

        '*************************************
        '*********** New Code ****************
        objEventLog.MaximumKilobytes = 20480
        objEventLog.ModifyOverflowPolicy(OverflowAction.OverwriteAsNeeded,0)
        '*************************************
        '*************************************

        'WriteEntry is overloaded; this is one
        'of 10 ways to call it
        Dim tmp As String = ""
        Dim tmpSize As Integer = 32000 '31890 works 31891 does not
        Do While Entry.Length > tmpSize
            tmp = Entry.Substring(0,tmpSize - 1)
            objEventLog.WriteEntry(tmp,EventLogEntryType.Information)
            Debug.WriteLine(tmp.Length.ToString)
            Entry = Entry.Substring(tmpSize)
        Loop
        tmp = Entry
        objEventLog.WriteEntry(tmp,EventLogEntryType.Information)
    End Sub

End Module

但我发现在Log4Net上报告了一个错误,当写入大约30.000个字符的日志消息时,日志文件可能会损坏.
https://issues.apache.org/jira/browse/LOG4NET-360

我们现在将重新创建日志文件并在写入新日志条目之前剪切字符串.手指交叉,这有助于(评论赞赏).

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