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Memory Leak in Alarm&Event

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07 May 2014 12:56 #1938 by support

Replied by support on topic Memory Leak in Alarm&Event

I have modified the test to use our simulation server, and I am currently running it with version 5.23.1162.1.

For record, the modified code is as follows:

Code:

Imports OpcLabs.EasyOpc.AlarmsAndEvents

Public Class Form1

    Dim EasyAEClient As New EasyAEClient
    Dim AEFilter As New AESubscriptionFilter
    Dim MyHandle As Integer
    Dim State As Object

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim areas(0) As String
        areas(0) = "Resource"
        AEFilter.Areas = New AENodeDescriptor() {"Simulation"}
        AddHandler EasyAEClient.MultipleNotifications, AddressOf EasyAEClient_MultipleNotifications
        MyHandle = EasyAEClient.SubscribeEvents("", "OPCLabs.KitEventServer.2", 100, State, AEFilter)
    End Sub

    Private Sub EasyAEClient_MultipleNotifications(ByVal sender As Object, ByVal ev As EasyAEMultipleNotificationsEventArgs)
        For i As Integer = 0 To ev.ArgsArray.Count - 1
            Dim e = ev.ArgsArray(i)
            If Not e.Event Is Nothing Then
                Label1.Text += 1
            End If
        Next
    End Sub

End Class

I will let you know when I have the results.

BTW, how many events per minute do you have, very roughly?
Thank you

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Filliolej
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07 May 2014 08:03 #1933 by Filliolej

Replied by Filliolej on topic Memory Leak in Alarm&Event

This is the trend of Private Bytes used... in one day!

Attachments:

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Filliolej
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06 May 2014 11:32 - 06 May 2014 11:40 #1925 by Filliolej

Replied by Filliolej on topic Memory Leak in Alarm&Event

This is the Windows form application that we are using for test

Code:

Public Class Form1

    Dim EasyAEClient As New OpcLabs.EasyOpc.AlarmsAndEvents.EasyAEClient
    Dim AEFilter As New OpcLabs.EasyOpc.AlarmsAndEvents.AESubscriptionFilter
    Dim MyHandle As Integer
    Dim State As Object

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim areas(0) As String
        areas(0) = "Resource"
        AEFilter.Areas = areas
        AddHandler EasyAEClient.MultipleNotifications, AddressOf EasyAEClient_MultipleNotifications
        MyHandle = EasyAEClient.SubscribeEvents("", "HIMA.TEST-XAE-AE.1", 100, State, AEFilter)
    End Sub

    Private Sub EasyAEClient_MultipleNotifications(ByVal sender As Object, ByVal ev As OpcLabs.EasyOpc.AlarmsAndEvents.EasyAEMultipleNotificationsEventArgs)

        Try

            For i As Integer = 0 To ev.ArgsArray.Count - 1
                Dim e = ev.ArgsArray(i)
                If Not e.Event Is Nothing Then
                    If e.Event.QualifiedSourceName <> "System" Then
                        Label1.Text += 1
                    End If
                End If
            Next

        Catch ex As Exception

        End Try

    End Sub

End Class

Waiting for your reply

Regards

Last edit: 06 May 2014 11:40 by support. Reason: [code] usage

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06 May 2014 09:21 #1924 by support

Replied by support on topic Memory Leak in Alarm&Event

The 5.12 license won't work with 5.30, and normally you would need to buy an upgrade.

But if you can show that the memory leak is present in 5.12 and not in 5.23 or 5.30, I will get you the upgraded license for free. If it is present in 5.23/5.30 as well, we will fix it there - and in such case you will get it for free as well. Do not expect version 5.12 be fixed.

But the whole thing assumes that there is a reproducible case.

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Filliolej
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06 May 2014 09:17 #1923 by Filliolej

Replied by Filliolej on topic Memory Leak in Alarm&Event

Yes I see that there are new versions.
Can I use the 5.30 version with my licence for 5.12?

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06 May 2014 09:05 #1922 by support

Replied by support on topic Memory Leak in Alarm&Event

Hello,
thank you for reporting this.

Do you have a sample code that shows this? Of course we can put it together here, but if we had yours, it would be more likely that we will be able to reproduce it.

Also, 5.12 is a fairly old version. Currently we make bug fixes to versions 5.23 and 5.30.

Best regards,

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Filliolej
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06 May 2014 08:56 #1920 by Filliolej

Memory Leak in Alarm&Event was created by Filliolej

Hi,
we have detected a memory leak when we use the Alarm & Event Notification. In particular, our application is always on and, after a couple of days the memory used by itself become from 20MB to 500MB.
We made all check and it appens only when the we declare a new instance of
"OpcLabs.EasyOpc.AlarmsAndEvents.EasyAEClient" and add a handler
"AddHandler EasyAEClient.MultipleNotifications, AddressOf EasyAEClient_MultipleNotifications".
This appens also if no events arrive.

We are using a QuickOPC-Classic 5.12

Thanks

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