Re: User Disconnect Issues
- From: Tom Hula <thula@xxxxxxxxxxxx>
- Date: Mon, 10 Nov 2008 15:18:10 -0500
We had a similar issue on our Series A400 and we ended up tracing the whole thing to a single individual that was logging on, entering our menu, running a Speedware application that was resource hungry and then using a "no longer available" option to escape out of that Speedware application and then going into yet another application off a menu...Parent...child...grandchild...sometimes great-grandchild. And doing this same thing on 3 different sessions. People would just randomly get knocked off because the system was getting overwhelmed...I guess. After eliminating that escape option from the Speedware application, it's turned into a few times a year, but not every day like before.
Tom Hula
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From: "Wong, Wilson" <wwong@xxxxxxxxxxx>
Sent: Monday, November 10, 2008 2:23 PM
To: <HP3000-L@xxxxxxxxxxxxx>
Subject: [HP3000-L] User Disconnect Issues
We have been experiencing a lot of user disconnects issues lately and have not had a lot of success in pinpointing what is causing the problem nor finding a good solution. We have multiple HP3000 processors located here on site and the problem seems to be occurring on almost all of them but we have not found any commonality. We have checked our network, hardware, software, configurations, etc. with no luck.
Here is an additional description of the problem.
For some time now our user community has experienced a variety of disconnects and we are running out of ideas to check. The typical behaviors observed is, the user will be working in VPlus screens and transitioning between screen, often to a non-VPlus screen (e.g. a menu), they will see their screen go blank and after a bit the client (Minisoft or Reflections) will report a disconnect.
We have performed a variety of network tests and believe the network to be stable and substantially error free. We have added memory to the 3000 as well as looked at the networking tuning parameters. We have rebuilt the workstations and reviewed power-saver, terminal emulator, network settings. But clearly we have missed something.
In the packet captures we have done on the HP3000 side, the work station seems to be working fine for some extended period of time, and we will see several duplicate ACK issued from the client and several retransmission from the HP3000 then the connection "goes away". Occasionally we have seen a RST issued from the HP3000, but generally not. At this point the HP3000 user session is also terminated.
Any help would be much appreciated.
Thanks, Wilson Wong
Wilson Wong
HP3000 Systems Administrator
WA State Board for Community and Technical Colleges
3101 Northup Way, Suite 100
Bellevue, WA 98004
(425) 803-9764
wwong@xxxxxxxxxxx
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