DaveMT
February 27, 2014, 10:12am
1
I'm doing some testing for network errors..
Aspose.Email for .Net 4.0
version: 3.8.0.0
On a local newtork, then connect VPN to the company network
After I connect, I click on a button to check network state:
Try LogLocally("Connection: " & oImapClient.ConnectionState.ToString) Catch ex As Exception LogLocally("Catch: " & ex.Message) End Try
(works fine)
Then I diconnect VPN, recheck, the .ConnectionState call can not be trapped
System.IO.IOException was unhandled HResult=-2146232800 Message=Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host. Source=System StackTrace: at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size) at ..Write(Byte[] , Int32 , Int32 ) at ..Flush() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() InnerException: System.Net.Sockets.SocketException HResult=-2147467259 Message=An existing connection was forcibly closed by the remote host Source=System ErrorCode=10054 NativeErrorCode=10054 StackTrace: at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags) at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size) InnerException:
Is there a safer way to ceck for the connection being open?
Thanks, Dave
Hi Dave, Please accept my apologies for delayed response. I have tried to reproduce the issue in my local environment and have not been able to reproduce the issue. Can you please guide us further for how to set up the desired test environment on our end with which you are able to reproduce the issue. Please share the feedback in this regard so that we may proceed to help you further. Thanks and Best Regards,
DaveMT
February 28, 2014, 7:31am
3
On a local network
Connect to company network with VPN
Open connection to Exchange server
Check Conneciton
Drop VPN
Check Conneciton - causes failure 100% of the time
Hi Dave,
Thank you for the feedback.
It seems that the error may arise due to the network stream that is broken before tested for the connection state. We are currently in process of releasing Aspose.Email for .NET 3.9.0 that will take a couple of days more to be available for download and includes some improvements to the ImapClient as well. I would request you to please test this issue with the upcoming version and let us know your feedback then. We’ll further investigate it and assist you in this regard. Your cooperation is highly appreciated in this regard.
DaveMT
February 28, 2014, 12:45pm
5
Great… let me know if you want it tested before then… Dave
Hi Dave,
Since the new release is already under QA process, we request you to please wait until the new release is published and available for testing at your end.
Any update on this? Or where I can find out?
Thanks.. Dave
Thanks got it downloaded.. do you have an example of the order of the connecitons now?
I have this:
oImapClient = New ImapClient(Server, User, Password) oImapClient.Connect(True) oImapClient.SelectFolder(ImapFolderInfo.InBox)
But Connect says.. it's obsolete... examples still have it the 'old' way. Taking out the connect, errors in the SelectFolder call
Thansk.. Dave
Hi Dave, The connect and Login methods are now obsolete and there is no need to use them. Could you please give it a try using the following code sample as it is working at my end. Please let us know your feedback then. Sample Code:
ImapClient client = new
ImapClient ();
client.Host = "exchange.domain.com" ;
client.Username = "username" ;
client.Password = "password" ;
client.SelectFolder(ImapFolderInfo .InBox);
ImapMessageInfoCollection coll = client.ListMessages();
Console .WriteLine("Total
Count: " + coll.Count);
foreach (ImapMessageInfo
msgInfo in coll)
{
MailMessage msg =
client.FetchMessage(msgInfo.UniqueId);
}
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DaveMT
May 21, 2014, 7:26am
11
Thanks for the example.. but, this does not work
the .SelectFolder call causes an exception, and no message is set on the Catch ex as Exception
going back to 3.8, adding the connect back in.. works fine
Hi Dave,
We are sorry for any inconvenience caused to you.
I have tested the scenario again using Aspose.Email for .NET 4.1.0 and found that above mentioned sample code is working fine. As you mentioned that you don’t get any exception, I would like to share that now Aspose has provided new feature for logging activity by ImapClient and Pop3Client similar to SmtpClient . You may please use this feature to log the activity as mentioned here and let us know your feedback. We will try to provide assistance as soon as possible in this regard.
DaveMT
May 21, 2014, 1:13pm
13
Well.. we'll have to skip this upgrade then... thanks
Try oImapClient.SelectFolder(ImapFolderInfo.InBox) Catch ex As Exception
End Try
I just get ex.message = "ConnectFailure"
Hi Dave,
We recently identified an issue with default port number of IMAP client and that has been logged as NETWORKNET-34368 in our issue tracking system for further consideration by our development team. This issue was raised only when the ImapClient was initialized and used as follow:
ImapClient client = new ImapClient(“[exchange.aspose.com](http://exchange.aspose.com/)”, “asposeemail.test3”, “pwd”);
client.SelectFolder(ImapFolderInfo.InBox);
Other initializaitions of ImapClient didn’t raise this issue. The same may be the reason for the error that you are facing. I have linked this thread with the logged issue so that once the upcoming version of Aspose.Email for .NET is available, you’ll be notified and may test the issue.
We are sorry for the inconvenience caused to you in this regard.
The issues you have found earlier (filed as NETWORKNET-34368) have been fixed in this update .
This message was posted using Notification2Forum from Downloads module by Aspose Notifier . (2)