C# 服务器未运行异常冻结我的windows服务

在我们的内部网中，我们有一个包含两个计时器的windows服务。第一个每5分钟工作一次，获取Active Directory用户列表并用它更新数据库；第二个每小时工作一次，并做一些其他事情

有时，网络上的维护工作开始，服务内部逻辑捕获异常并将其写入日志。它始终是同一个-服务器无法运行。之后，两个计时器似乎都停止工作，但服务的状态为“已启动”，再也没有发生任何事情

异常处理如下所示：

void UserSyncTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
    try
    {
        new ADUsersSync().Sync();
    }
    catch(Exception exc) {
        Log.ErrorFormat("UserSyncTimer_Elapsed: Exception {0}", exc);
    }
}

2014-08-31 14:12:49,956 [10] DEBUG PortalService.BLL.ADUsersSync  - ADUsersSync Debug: in main catch and exception: The server is not operational.

2014-08-31 14:12:49,966 [10] ERROR PortalService.BLL.ADUsersSync  - System.Runtime.InteropServices.COMException (0x8007203A): The server is not operational.

   at System.DirectoryServices.SearchResultCollection.ResultsEnumerator.MoveNext()
   at PortalService.BLL.ADUsersSync.Sync()
2014-08-31 14:17:50,169 [5] DEBUG PortalService.BLL.ADUsersSync  - ADUsersSync Debug: in main catch and exception: The server is not operational.

2014-08-31 14:17:50,170 [5] ERROR PortalService.BLL.ADUsersSync  - System.Runtime.InteropServices.COMException (0x8007203A): The server is not operational.

   at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail)
   at System.DirectoryServices.DirectoryEntry.Bind()
   at System.DirectoryServices.DirectoryEntry.get_AdsObject()
   at System.DirectoryServices.DirectorySearcher.FindAll(Boolean findMoreThanOne)
   at System.DirectoryServices.DirectorySearcher.FindAll()
   at TNTPortalService.BLL.ADUsersSync.Sync()

同步功能中有一个主要的try-catch块：

public void Sync()
{

    try
    {
        DirectoryEntry Ldap = new DirectoryEntry("LDAP://OU=Users,OU=MOS1,OU=CCE,DC=portal,DC=ru");
        DirectorySearcher searcher = new DirectorySearcher(Ldap);
        searcher.Filter = "(&(objectClass=user)(objectCategory=Person)(memberOf:1.2.840.113556.1.4.1941:=CN=All Users,OU=DL,OU=Groups,DC=portal,DC=ru)) ";
        SearchResultCollection _s = searcher.FindAll();
        foreach (SearchResult sr in _s)
        {
        //... some code ..
        }
    }
    catch (Exception e)
    {
        Log.DebugFormat("ADUsersSync Debug: in main catch and exception: {0}",           e.Message);
        Log.Error(e);
    }
}

日志如下所示：

void UserSyncTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
    try
    {
        new ADUsersSync().Sync();
    }
    catch(Exception exc) {
        Log.ErrorFormat("UserSyncTimer_Elapsed: Exception {0}", exc);
    }
}

2014-08-31 14:12:49,956 [10] DEBUG PortalService.BLL.ADUsersSync  - ADUsersSync Debug: in main catch and exception: The server is not operational.

2014-08-31 14:12:49,966 [10] ERROR PortalService.BLL.ADUsersSync  - System.Runtime.InteropServices.COMException (0x8007203A): The server is not operational.

   at System.DirectoryServices.SearchResultCollection.ResultsEnumerator.MoveNext()
   at PortalService.BLL.ADUsersSync.Sync()
2014-08-31 14:17:50,169 [5] DEBUG PortalService.BLL.ADUsersSync  - ADUsersSync Debug: in main catch and exception: The server is not operational.

2014-08-31 14:17:50,170 [5] ERROR PortalService.BLL.ADUsersSync  - System.Runtime.InteropServices.COMException (0x8007203A): The server is not operational.

   at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail)
   at System.DirectoryServices.DirectoryEntry.Bind()
   at System.DirectoryServices.DirectoryEntry.get_AdsObject()
   at System.DirectoryServices.DirectorySearcher.FindAll(Boolean findMoreThanOne)
   at System.DirectoryServices.DirectorySearcher.FindAll()
   at TNTPortalService.BLL.ADUsersSync.Sync()

如何防止服务冻结

---

另外，由于未处理SearchResultCollection，导致内存泄漏，并在服务器上消耗1.5GB RAM。为下一次fial提供指导，以便与公司it支持部门进行深入检查

您是否为您的

DirectoryEntry

提供了正确的LDAP地址？是的，它在其余时间都可以正常工作