This is the situation:
I have written a Windows Service that monitors the Domain Controllers Security eventlog for certain events.
It filters the eventmessages and sends email if a filter is matched.
The service runs fine until our HR-->Active Directory import runs.
This adds ca. 2000 events to the Security eventlog within 2 seconds.
After this, the service still runs, but doesn't respond to new events anymore.
Hopefully someone can point me in the right direction to solve this
Public Class EventLogWatcherService
Private Shared signal As AutoResetEvent
Protected Overrides Sub OnStart(ByVal args() As String)
' This is where the service starts
'Start the Event Log Watcher Service as a new thread
Dim workerThread = New Thread(AddressOf WatchEventLog)
'Write start message to Eventlog
WriteLogMessage("Service Started", EventLogEntryType.Information)
Public Sub WatchEventLog()
'Set new event
signal = New AutoResetEvent(False)
'Connect to the OS-Security Eventlog
Dim logwatcherlog = New EventLog("Security", ".", "LogMonitoringService")
logwatcherlog.Source = "LogMonitoringService"
'Add event handler to the Security Eventlog. This triggers at new events
AddHandler logwatcherlog.EntryWritten, New System.Diagnostics.EntryWrittenEventHandler(AddressOf EventLog1_EntryWritten)
logwatcherlog.EnableRaisingEvents = True
'Wait for Event
Public Sub EventLog1_EntryWritten(ByVal [source] As Object, ByVal e As entryWrittenEventArgs)
'Check the Events on EventID's. On match a new thread is fired to handle this event.
If e.Entry.InstanceId = "4728" Or e.Entry.InstanceId = "4729" Then
Dim thread As New Threading.Thread(AddressOf FoundEventToHandle)
Public Sub FoundEventToHandle(ByVal e As EntryWrittenEventArgs)
‘Filters the eventmessage and sends an email on a filter match.
'** WHEN HR-->AD IMPORT IS RUN, THIS PART ISN"T REACHED**
'Dispose the current Entry to prevent unresponive service
'Sleep short and Signal for complete