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.NET Forum / .NET Framework / New Users / July 2006Windows service timeout
Hello everybody. I'm currently developing a windows service. In OnStart a launch two threads that carry on some work while the service is running. My problem comes from the fact that once the service is installed, it just time out at system startup and don't start. But i'm able to start it manually once i'm logged in. I read in a page something about signed assemblyes, saying that clr have to verify the executable at startup, causing the delay. I just unsigned the assembly and still face the same problem. I also notice that some compilation of the solution start at system starup, and othes does not, with out aparent reason, because there is no code change. Any sugestion? Here is my code for OnStart method. /// <summary> /// Method launched on service start. /// </summary> /// <param name="args">none</param> protected override void OnStart(string[] args) { ThreadPool.QueueUserWorkItem(new WaitCallback(JobWs), null); ThreadPool.QueueUserWorkItem(new WaitCallback(JobManteinance), null); //// Write info to eventlog, so controler detects the service start. eventLog.WriteEntry("Service started", EventLogEntryType.Information); } JobWs and JobManteinance are two functions that do all the work. Thanks in advance. There's a general question about how you are installing the service and how you are starting it. For example, it has a dependency on the Eventlog service, so there's a chance it will fail when it starts up after a reboot unless it's configured to be dependent on the Event Log service. There may be other services it's dependent on (such as RPC). You're probably crashing in OnStart and you time out because you never return properly from it. Your model isn't one I'd use. OnStart is like an event that lets you do some initialization. It's typically not the place to start threads that do all the work on the service, IMO. Usually the Main method is where you use System.ServiceProcess.ServiceBase to call run on an instance of your service class. You should also worry about putting something in OnStop to shut down your threads in an orderly manner.  SignaturePhil Wilson [MVP Windows Installer] ---- > Hello everybody. I'm currently developing a windows service. In OnStart > a launch two threads that carry on some work while the service is [quoted text clipped - 25 lines] > JobWs and JobManteinance are two functions that do all the work. > Thanks in advance. Hello Phil, thanks for your answer. So, you suggest that I only shoul initialize variables in OnStart method? And how do I start the threads then? Could you provide some code example of the model you talk about? Another question is: If i do my service dependant on other, windows will launch first the necesary services before launching mine? It is the first windows service i write and in the examples i saw in internet people usually start the threads in OnStart event. I'm also overwriting the OnStop event handler, an there I stop the threads I launched. As they are not cooperating in any way, it's not important the order. Any help would be apreciated. Thanks again. Oscar Acosta > There's a general question about how you are installing the service and how > you are starting it. For example, it has a dependency on the Eventlog [quoted text clipped - 42 lines] > > JobWs and JobManteinance are two functions that do all the work. > > Thanks in advance. If you set up the dependencies correctly then yes, your service will start after the event log service has started. There are always lots of ways to do something, but this is the general model for services that I prefer: http://www.codeproject.com/csharp/cron.asp where a thread belonging to the class is started in OnStart and stopped in OnStop, and the thread runs some method you implement. However it's cleaner to use a ManualResetEvent that the thread checks periodically so that it can shut down cleanly, rather than Thread.Abort used there. Your ThreadPool doesn't seem to deal with the case where the service gets stopped (how do you shut down the threads etc). So you might get into some issues when you try to stop your service unless you deal with that. However I suspect your crashing problem at boot time is your dependency on the event log service. SignaturePhil Wilson [MVP Windows Installer] ---- > Hello Phil, thanks for your answer. So, you suggest that I only shoul > initialize variables in OnStart method? And how do I start the threads [quoted text clipped - 62 lines] >> > JobWs and JobManteinance are two functions that do all the work. >> > Thanks in advance. Hello Phil. Thanks a lot, you were completely rigth about it, I added the dependency and the service now starts fine! I was using the ThreadPool because I was getting mad about the reason for the service not starting. So I thougt that maybe the overhead caused by the new threads were the problem, and I decided to use the threadpool thinking that maybe as those threads were already created by the framework i could win some miliseconds ;) Thanks a lot again! Oscar Acosta > If you set up the dependencies correctly then yes, your service will start > after the event log service has started. [quoted text clipped - 80 lines] > >> > JobWs and JobManteinance are two functions that do all the work. > >> > Thanks in advance. Hello again. I have one more question. Is there any way to know all the services that mine depends on? Thanks, Oscar Acosta > If you set up the dependencies correctly then yes, your service will start > after the event log service has started. [quoted text clipped - 80 lines] > >> > JobWs and JobManteinance are two functions that do all the work. > >> > Thanks in advance. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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