SSHClient: ForwardedPortLocal: memory issue
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Descrizione
Hello,
I am using the following code below. I call this ConnectSSH() every 5 seconds (as a test to see how it performs)
After I let this run a night, i see that the used memory increased significantly, and it keeps rising.
After some investigation on my own, i notice that when I remove the "forwardedportlocal" object, (so I don't make such an object, and I obviously don't start it) Then there is no memory issue. The client is created, and then disposed cleanly.
I can see this happening the diagnostic tool of visual studio.
I already added portfwld.stop() and portfwld.dispose() together with of course SshClient.disconnect() and SshClient.dispose()
but that did not help.
I made a version in vb.net and also one in c#, but the results are the same.
I also Commented the connection to the database to show that this is not the issue.
I hope someone can give me some insight of what is happening, or perhaps what I am doing wrong?
class mySQLviaSHH
{
public void ConnectSSH()
{
using (var SSHClient = new SshClient("myhost", "administrator", "mypassword"))
{
try
{
// Console.WriteLine("Trying SSH connection...")
SSHClient.Connect();
if (SSHClient.IsConnected)
Console.WriteLine("SSH connection is active");
else
Console.WriteLine("SSH connection has failed");
Console.WriteLine("Trying port forwarding...");
var portFwld = new ForwardedPortLocal("127.0.0.1", "127.0.0.1", 3306);
SSHClient.AddForwardedPort(portFwld);
portFwld.Start();
if (portFwld.IsStarted)
Console.WriteLine("Port forwarded: {0}", portFwld.ToString());
else
Console.WriteLine("Port forwarding has failed.");
}
catch (SshException e)
{
Console.WriteLine("SSH client connection error: {0}", e.Message);
}
}
}
}
Public Sub ConnectSSH()
Using SSHClient = New SshClient("myhost", "administrator", "mypassword")
Try
Console.WriteLine("Trying SSH connection...")
SSHClient.Connect()
If SSHClient.IsConnected Then
Console.WriteLine("SSH connection is active")
Else
Console.WriteLine("SSH connection has failed")
End If
Console.WriteLine(vbCrLf & "Trying port forwarding...")
Dim portFwld = New ForwardedPortLocal("127.0.0.1", "127.0.0.1", 3306)
SSHClient.AddForwardedPort(portFwld)
portFwld.Start()
If portFwld.IsStarted Then
Console.WriteLine("Port forwarded: {0}", portFwld.ToString())
' 'Dim dbConnect As DBConnect = New DBConnect(portFwld.BoundHost, "wcs_sch", "root", "dbpassword", "3306")
' 'Dim ct = dbConnect.Count("wcs_msg_host")
' 'Console.WriteLine(ct.ToString())
Else
Console.WriteLine("Port forwarding has failed.")
End If
Catch e As SshException
Console.WriteLine("SSH client connection error: {0}", e.Message)
Catch e As System.Net.Sockets.SocketException
Console.WriteLine("Socket connection error: {0}", e.Message)
End Try
End Using
End Sub
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Direzione di ricerca
Inizia dal punto di ingresso ConnectSSH e dalla creazione ripetuta di ForwardedPortLocal mostrata nel report. Riproduci lo scenario durante la notte o con chiamate ripetute, quindi traccia il ciclo di vita del port forwarding e il comportamento di rilascio; il lavoro è completato quando le connessioni ripetute non mostrano più un uso della memoria in costante aumento.
Scritto dal modello di indicizzazione a partire dal testo della issue.
Valutazione
- Stack tecnologico
- csharp
- Ambito
- networking
- Tipo di issue
- Bug
- Difficoltà
- 4/5
- Tempo stimato
- 3-5 giorni
- Stato di attività
- Ferma
- Chiarezza
- Da chiarire
- Idoneità per principianti
- 30/100