[2 days left] What’s wrong with your cloud strategy? Learn why multicloud solutions matter with Nimble Storage.Register Now

x
?
Solved

C# Memory leak with ConcurrentQueue

Posted on 2012-12-26
3
Medium Priority
?
504 Views
Last Modified: 2015-05-29
0 down vote favorite
      

i have memory leak when using ConcurrentQueue :
requestObject request = xxx;

Item obj= new Item ();
obj.MessageReceived += obj_MessageReceived;
obj.Exited += obj_Exited;

request.Key = obj.Key;

obj.AddRequest(request);

_queue.TryAdd(obj.Key, obj);

Open in new window


In the "Exited" callback, i dispose the resource :
void LiveSphere_Exited(string key)
{
   Item instance;

   _queue.TryRemove(key, out instance);

Task.Factory.StartNew(() =>
{
    var wait = new SpinWait();
                while (instance.MessageCount > 0)
                {
                    wait.SpinOnce();
                }
            }).ContinueWith((t) =>
            {
                if (instance != null)
                {
                    //Cleanup resources
                    instance.MessageReceived -= obj_MessageReceived;
                    instance.Exited -= obj_Exited;
                    instance.Dispose();
                    instance = null;
                }
            });

Open in new window

When i profile the code, i still have a root referenced "Item" object but i don't know where i can dispose..., The exited method is triggered and the _queue has removed the "Item" object from the queue.

When i read documentation, the concurrentqueue copy the reference into the queue.

Can you help me to find out where the memory leak is?

Thank you,

Kind Regards.
0
Comment
Question by:Dnx_7
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 8

Expert Comment

by:hpdvs2
ID: 38721157
Are you sure nothing else is holding on to the Item object?  I can see you grabbed a reference from your code, and called the dispose method, however, something else may still have a reference to it.  which means it will never get collected.

You referred to this:
i still have a root referenced "Item" object
I'm wondering if that means you are looking at another reference still tied to the object.  For instance, are you removing an item from a tree, but still leaving parent/child references intact, or something similar?
0
 
LVL 2

Accepted Solution

by:
Dnx_7 earned 0 total points
ID: 38721212
Hi,

Thank you for your quick response.

No where else, the "Item" object is used, the "Item" object is declared within a method, add to a concurrentqueue and that's it.

The item triggered the "Exited" when the item can be disposed, what i do in the Exited Callback method.

i still have a rooted ref, i double check inside the "Item" object but everything is cleared about resources
0
 
LVL 2

Author Closing Comment

by:Dnx_7
ID: 40802069
i found myself the solution
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

We all know that functional code is the leg that any good program stands on when it comes right down to it, however, if your program lacks a good user interface your product may not have the appeal needed to keep your customers happy. This issue can…
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
This tutorial will teach you the special effect of super speed similar to the fictional character Wally West aka "The Flash" After Shake : http://www.videocopilot.net/presets/after_shake/ All lightning effects with instructions : http://www.mediaf…

656 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question