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  1. Forum
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  5. QuickOPC-Classic in .NET
  7. Reading, Writing, Subscriptions, Property Access
  9. Memory Leak in GetPropertyValue

Memory Leak in GetPropertyValue

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13 Jan 2014 10:22 #1660 by DavidGSAB
Replied by DavidGSAB on topic Memory Leak in reading values
Thanx!

I will update and confirm.

/David

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13 Jan 2014 07:47 #1658 by support
Replied by support on topic Memory Leak in reading values
Dear Sir,
we have fixed the problem. Thank you again for reporting it.

Fix for QuickOPC 5.23 is in builds 5.23.1024.1 and later, and this build is now the one that is in the public download area of this site.

Fix for QuickOPC 5.30 is in builds 5.30.1024.1 and later, and this build is now the one that is in the public download area of this site.

Best regards
The following user(s) said Thank You: DavidGSAB

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08 Jan 2014 09:59 #1657 by DavidGSAB
Replied by DavidGSAB on topic Memory Leak in reading values
Thanx!

As of now we have to regulary log in (every 3 days) into our customers server and restart the service to prevent dataloss so it is a bit urgent to have some sort of hotfix or workaround as soon as possible.

Thank you again for the fast responce

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08 Jan 2014 09:48 #1656 by support
Replied by support on topic Memory Leak in reading values
Thank you.
I was able to reproduce the issue (with QuickOPC 5.30.513.1, actually).
I will let you know when we have a resolution.
Best regards

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07 Jan 2014 15:11 #1655 by DavidGSAB
Replied by DavidGSAB on topic Memory Leak in reading values
Hi!

The version on BaseLib is 5.21.175.1

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07 Jan 2014 12:23 #1654 by admin
Replied by admin on topic Memory Leak in reading values
Hello,

thank you for this information. Which QuickOPC version and build are you using please? (most reliable way to find out: right-click on one of the assemblies, select Properties, and find the version info on the Details tab).

Best regards

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07 Jan 2014 09:31 #1652 by DavidGSAB
Memory Leak in reading values was created by DavidGSAB
Hi!

We have detected a memoryleak when reading values from OPC. I made a consolprogram that duplicates the problem. The leak is not big but our application runs as a Windows Service and eventually crashes due to "SystemOutOfMemory" Exception. We have isolated the problem to be in the GetProperty method.

This code shows an example which results in a memoryleak:
static void Main(string[] args)
        {
            while (true)
            {
                ReadValue();
                Thread.Sleep(10);
            }
 
        }
 
        private static EasyDAClient Client;
 
        private static string ReadValue()
        {
            if(Client == null)
                Client = new EasyDAClient();
 
            return Client.GetPropertyValue(@"localhost", "OPCLabs.KitServer.2", "Boilers.Boiler #1.CC1001.Input1", 2).ToString();
        }

Is there another way we can do this to avoid the leak?

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  1. Forum
  3. Discussions
  5. QuickOPC-Classic in .NET
  7. Reading, Writing, Subscriptions, Property Access
  9. Memory Leak in GetPropertyValue
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