Question

我写了这样一个窗口服务：

  public partial class Service1 : ServiceBase
{
    private Thread writerThread;
    private Thread messageThread;
    private bool stopNow;

    public Service1()
    {
    }

    private void MessageThread()
    {
        while (stopNow == false)
        {
            try
            {
               //Do Something
                Thread.Sleep(10000);
            }
            catch (Exception e)
            {
                GLogWriter.Write(String.Format("Critical exception {0}. Inner Exception {1} ", e.Message, e.InnerException.Message), LogCategories.Generic, TraceEventType.Critical);
                OnStop();
            }
        }
    }

    private void WriterThread()
    {
        bool checkGruppoIndirizzi = true;

        while (stopNow == false)
        {
            try
            {
                //Do something else
                Thread.Sleep(10000);
            }
            catch (Exception e)
            {
                GLogWriter.Write(String.Format("Critical exception {0}. Inner Exception {1} ", e.Message, e.InnerException.Message), LogCategories.Generic, TraceEventType.Critical);
                OnStop();
            }
        }
    }

    protected override void OnStart(string[] args)
    {
        GLogWriter.Write("SERVICE IS STARTING", LogCategories.Generic, TraceEventType.Information);

        this.stopNow = false;

        writerThread = new Thread(new ThreadStart(this.WriterThread));
        writerThread.Start();

        this.messageThread = new Thread(new ThreadStart(this.MessageThread));
        this.messageThread.Start();
    }

    protected override void OnStop()
    {
        GLogWriter.Write("SERVICE IS STOPPING", LogCategories.Generic, TraceEventType.Information);
        stopNow = true;
        writerThread.Join(1000);
        messageThread.Join(1000);
        GLogWriter.Write("SERVICE STOP SUCCESSFUL", LogCategories.Generic, TraceEventType.Information);
    }
}

}

问题是当我捕获异常时，显然没有调用OnStop（）并且服务在没有记录“SERVICE IS STOPPING”消息的情况下立即停止

Answer 1

请查看Windows事件日志以查看您获得的错误或异常类型。如果它是一个程序异常，它肯定会被catch捕获。所以我怀疑服务在系统级别抛出异常。

应该通过事件日志来诊断。

Answer 2

当服务的线程停止工作时，

OnStop()方法不应被调用。这是一个特殊的过程，应该由服务控制管理器调用。换句话说，OnStop()是应该在需要时正常停止服务的过程。有人打电话OnStop() - ＆gt;服务已停止。它不是相反的（服务中发生的事情 - ＆gt;线程退出 - ＆gt; OnStop()被调用）

Answer 3

这是因为以下一行：

GLogWriter.Write(String.Format("Critical exception {0}. Inner Exception {1} ", e.Message, e.InnerException.Message), LogCategories.Generic, TraceEventType.Critical);

InnerException并不总是一个对象，而是null。

将该行更改为：

GLogWriter.Write(String.Format("Critical exception {0}. Inner Exception {1} ", e.Message, ((e.InnerException == null) ? string.Empty : e.InnerException.Message)), LogCategories.Generic, TraceEventType.Critical);

捕获未处理的异常Windows服务

3 个答案: