Lotus Notes Error “Network operation did not complete in a reasonable amount of time” Resolution
I was working from home yesterday (had a dentist appointment to get my root canal crowned, and 2 fillings) and ran into an issue with Lotus Notes when I tried to send an email. Basiclly it failed with “Network operation did not complete in a reasonable amount of time”. But wait, pings never get lost, reverse dns is fine (wasn’t sure if notes did a reverse check when you sent or not) and my connectivity within VPN is perfect. So I pull out wireshark (which is a great packet troubleshooting program if you’ve never used or heard of it) went to send my mail and got:
So I checked out the packet and found:
So when I send the packet it has an MTU size of 1500 and I never get it back. My guess is it hit the firewall, went through (with some possibly destination information) and got blocked on its way back. The re-transmissions were obviously because the client didn’t get the packet back.
So I lowered my MTU for my vpn device tun0 (you can find your device that vpn is on by running ifconfig or /sbin/ifconfig if /sbin is not in your $PATH).
To lower your MTU run:
sudo ifconfig tun0 mtu 1300
started a sniff, resent and all was good.
3 Comments to Lotus Notes Error “Network operation did not complete in a reasonable amount of time” Resolution
Seems like your maximum segment size (mss) is not lowered on the way to the server. If you are running a recent kernel, maybe the problem is related to the one described here: http://lwn.net/Articles/304791/
ben.kevanNovember 6, 2008
Hey Georg,
Thanks a ton.. that looks quite helpful. I am going to change the tcp timestamp to see if the issue goes away, and if it does, I’ll blame it on the issue you’ve pasted.
I am running 2.6.27.4 :o) .. most likely the reason I see the issue.
Thanks a ton for that.. I’ll write up a bit on that when I read more.
cwxwwwxwwxwxDecember 23, 2008
well, hi admin adn people nice forum indeed. how’s life? hope it’s introduce branch 
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November 6, 2008