ASG
IBM
Zystems
Cressida
Icon
Netflexity
 
  MQSeries.net
Search  Search       Tech Exchange      Education      Certifications      Library      Info Center      SupportPacs      LinkedIn  Search  Search                                                                   FAQ  FAQ   Usergroups  Usergroups
 
Register  ::  Log in Log in to check your private messages
 
RSS Feed - WebSphere MQ Support RSS Feed - Message Broker Support

MQSeries.net Forum Index » General IBM MQ Support » VPN switches to sleep mode, IBM XMS listener stops receiving

Post new topic  Reply to topic
 VPN switches to sleep mode, IBM XMS listener stops receiving « View previous topic :: View next topic » 
Author Message
dudetom
PostPosted: Fri Oct 20, 2017 5:37 am    Post subject: VPN switches to sleep mode, IBM XMS listener stops receiving Reply with quote

Apprentice

Joined: 29 Sep 2017
Posts: 45

In a production environment, we have IBM MQ Client v8.0.0.5 running and connected to the Queue Manager server. The connection is established using a VPN tunnel. Our System Engineer said that one of our servers was upgraded and that led to VPN switching to sleep mode until data passes from our side to the server but that didn't happen.
The IBM listener that was running during that time didn't receive any event about a connection that was closed.

All the messages were stacked on the server queue and the client side listener couldn't consume those because the VPN was sleeping. On application level I have no idea how I can discover such behavior (VPN going to sleep). The System Engineer says to implement some kind of pinging system which pings the IBM server each 15 minute so the connection (VPN tunnel) stays open.

I read about heartbeat and keepalive intervals. Are these meant to be used in such problems like this?

How I connect (.NET IBM.XMS library):


Code:
var factoryFactory = XMSFactoryFactory.GetInstance(XMSC.CT_WMQ);
var cf = factoryFactory.CreateConnectionFactory();

cf.SetStringProperty(XMSC.WMQ_HOST_NAME, host);
cf.SetIntProperty(XMSC.WMQ_PORT, port);
cf.SetStringProperty(XMSC.WMQ_CHANNEL, channel);
cf.SetIntProperty(XMSC.WMQ_CONNECTION_MODE, XMSC.WMQ_CM_CLIENT);
cf.SetStringProperty(XMSC.WMQ_QUEUE_MANAGER, queuemanager);
cf.SetStringProperty(XMSC.USERID, user);
cf.SetStringProperty(XMSC.PASSWORD, password);
cf.SetIntProperty(XMSC.WMQ_CLIENT_RECONNECT_OPTIONS, XMSC.WMQ_CLIENT_RECONNECT);

connection = cf.CreateConnection();
connection.ExceptionListener = ExceptionCallback;
session = connection.CreateSession(false, AcknowledgeMode.AutoAcknowledge);
destination = session.CreateQueue(queuename);
consumer = session.CreateConsumer(destination);
consumer.MessageListener = listener;
connection.Start();


private void ExceptionCallback(Exception ex)
{
   //log exception, in case of unexpected error -> exit with code -1
}


Thanks for any help!! I'm clueless
Back to top
View user's profile Send private message
Vitor
PostPosted: Fri Oct 20, 2017 6:59 am    Post subject: Re: VPN switches to sleep mode, IBM XMS listener stops recei Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA

dudetom wrote:
The IBM listener that was running during that time didn't receive any event about a connection that was closed.


The VPN wouldn't raise an event. It thinks the listener has disconnected and therefore there's nothing to talk to.

dudetom wrote:
On application level I have no idea how I can discover such behavior (VPN going to sleep).


You almost certainly can't.

dudetom wrote:
The System Engineer says to implement some kind of pinging system which pings the IBM server each 15 minute so the connection (VPN tunnel) stays open.

I read about heartbeat and keepalive intervals. Are these meant to be used in such problems like this?
.

Yes. Speak to your MQ admin.
_________________
Honesty is the best policy.
Insanity is the best defence.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic  Reply to topic Page 1 of 1

MQSeries.net Forum Index » General IBM MQ Support » VPN switches to sleep mode, IBM XMS listener stops receiving
Jump to:  



You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Protected by Anti-Spam ACP
 
 


Theme by Dustin Baccetti
Powered by phpBB © 2001, 2002 phpBB Group

Copyright © MQSeries.net. All rights reserved.