Re: ManagementEventWatcher.start=OutOfMemoryException

From: Manfred Braun (aa_at_bb.cc)
Date: 04/12/04 

Date: Mon, 12 Apr 2004 23:00:41 +0200

Hello Willy and All,

in the meantime, I grabbed out an old script, which does similar the same
and astoundingly, it produces the same error. The exact output from the
catch in C# is:

Exception:System.OutOfMemoryException: Not enough storage is available to
complete this operation.
   at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32
errorCode, IntPtr errorInfo)
   at System.Management.ManagementEventWatcher.Start()
   at EventlogTestWatcher.Run() in
d:\Develop\Dev\Experimente\cs\Projetcs\EventlogCollectorService\Tools\Eventl
ogTestWat
cher1.cs:line 88

[Sorry, this is a more full blown version, but pricipially the same;But so
the line-number is naturally another on].
And I cannot imagine, what type of storage could be meant, disk and memory
are all enough present.

About the "authority": This is how [if ;-) ] I understand WMI. In this case
the authority is the remote machine itself, where the given user must exist
and has that password. BTW, not to mention, the accounts all have admin
rights there. I have to specify different user/pass for each machine to
connect to, but this is an exception, my most machines are domain-members.
If I am back into work tomorrow, I'll test a W2k-W2K query using a
domain-account having admin rights on both sides - but this is not my
requested need :-(
The code works the same, if I omit the "Authority" and specify the
"computer\user" syntax for the username.

I just added

  co.Impersonation = ImpersonationLevel.Impersonate;
  co.Authentication = AuthenticationLevel.Connect;

to the code, but the error remains the same.
I remember, that there were changes to the default DCOM security settings
between different OS versions, but I do not exactly remember, which
difference. I have had a look at all my testmachines with DCOMCNFG and the
settings are all the same, for NT4/W2K/XP [connect/identify].

Thanks for your help so far!!!
Best regards,
Manfred

"Willy Denoyette [MVP]" <willy.denoyette@pandora.be> wrote in message
news:%23XdymmMIEHA.3848@tk2msftngp13.phx.gbl...
> Can't try it out right now, but here are some hints...
> Did you try to set ImpersonationLevel.Impersonate, this is the default on
> W2K and higher but not on NT4.
> Did you try using wbemtest.exe to diagnose the problems source?
> In your original post you said none of the machines are domain members,
why
> did you specify the Authority?
> Can you put your Start method in a try/catch block to make sure the
> exception is thrown by Start.
>
> Willy.
>
> "Manfred Braun" <aa@bb.cc> wrote in message
> news:eYVanzLIEHA.3040@TK2MSFTNGP09.phx.gbl...
> > Hi Willy and All,
> >
> > ok, I striped the code down to a functional minimum, here it is:
> >
> >
> > //ProbDemoTest.cs
> >
> > using System;
> > using System.Management;
> >
> > public class ProbDemo
> > {
> > public static void Main()
> > {
> > ManagementEventWatcher watcher;
> > ConnectionOptions co;
> > ManagementPath mp;
> > ManagementScope ms;
> > WqlEventQuery weq;
> >
> > co = new ConnectionOptions();
> > co.Timeout = new TimeSpan(0, 0, 60);
> > co.EnablePrivileges = true;
> > co.Authority = "NTLMDOMAIN:x100";
> > co.Username = "tester";
> > co.Password = "abc";
> >
> > mp = new ManagementPath();
> > mp.NamespacePath = @"\root\cimv2";
> > mp.Server = "x100";
> > ms = new ManagementScope(mp, co);
> > weq = new WqlEventQuery("select * from __InstanceCreationEvent where
> > TargetInstance isa 'Win32_NTLogEvent'");
> > watcher = new ManagementEventWatcher(ms, weq);
> > watcher.EventArrived += new
EventArrivedEventHandler(ProbDemo.OnMessage);
> > watcher.Start(); //ERROR
> >
> > Console.WriteLine("Press enter to finish querying...");
> > Console.ReadLine();
> > }
> >
> > public static void OnMessage(object sender, EventArrivedEventArgs e)
> > {
> > Console.WriteLine("Event, event...");
> > ManagementBaseObject mbo =
> > (ManagementBaseObject)e.NewEvent["TargetInstance"];
> > string msg = ((string) mbo["Message"]).Trim();
> > Console.WriteLine(msg);
> > }
> >
> > }
> >
> >
> > Luckily [???], this small version has the same error-behavior ....
> >
> > Thanks so far and
> > best regards,
> > Manfred
> >
> >
> > "Willy Denoyette [MVP]" <willy.denoyette@pandora.be> wrote in message
> > news:Owi%23QYKIEHA.1048@TK2MSFTNGP12.phx.gbl...
> >> Please post a complete sample that illustrates the problem, whithout
any
> >> code it's hard to tell what's the cause of such an exception.
> >>
> >> Willy.
> >>
> >> "Manfred Braun" <aa@bb.cc> wrote in message
> >> news:%23ta73rJIEHA.1220@tk2msftngp13.phx.gbl...
> >> > Hi All,
> >> >
> >> > I am writing on a small tool in C#, which creates a
> > ManagementEventWatcher
> >> > to receives events from a remote machine. Astoundingly, this behaves
> >> > different between different OS. It works fine, if the exe runs on
> > Windows
> >> > 2000 and connects to NT4 or XP, but it cannot connect to other
Windows
> >> > 2000
> >> > machines. If the exe runs on XP, it can connect to Windows 2000 and
> >> > othe
> >> > machines as well.
> >> >
> >> > I get the error in the subject line, with text "Not enough storage is
> >> > available to complete this operation."
> >> >
> >> > All effected boxes have about 200 MB free memory [and not sure, that
> >> > "sorage", form the error-message, means memory] ;-) and I am sure,
> >> > it's
> > a
> >> > securiry issue. I compared the DCOM settings and they are the same
for
> > all
> >> > tested computers [again, which are NT4, XP and Windows 2000]. None of
> > this
> >> > test-machines is member of any domain and I specify explicitely
> >> > username
> >> > and
> >> > password, which are valid on the remote computer and work fine for
> >> > other
> >> > methods [DirectoryEntry, specifying credentials and this works!!!!!,
> > even
> >> > for Windows 2000!!!].
> >> >
> >> > I made some tests to vary my connection-settings for the Windows 2000
> >> > machine and also tried to explicitely set ImpersonationLevel and
> >> > Authentication in code, without any success.
> >> >
> >> > Any help would be really very welcomed, I am out of hope!
> >> >
> >> > Best regards,
> >> > Manfred Braun
> >> >
> >> > (Private)
> >> > Mannheim
> >> > Germany
> >> >
> >> > mailto:_manfred.braun_@manfbraun.de
> >> > (Remove the anti-spam-underscore to mail me!)
> >> >
> >> >
> >> >
> >>
> >>
> >
> >
>
>

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