From: "Stephen J. Orth"
I don't have an solution for you but I would love to know how to stop these
issues as they are regular problems facing our OEM Clients.
We have talked to our Clients about port time outs, external scanning software,
etc. We have made adjustments on our side where we can...but we just cannot
seem to stop these issues. What is worse, we really don't have any more
suggestions for our Clients as this is only linked to 4D.
I haven't been following this thread closely Steve, but here's something
else to keep an eye on and consider....
We too are having issues with one of our customers (with Windows merged
app server), who has been having relatively frequent client
disconnections. We believe there were TWO different issues at work...
We managed to solve quite a few of those by ensuring the Power Settings
on the Windows server were set to 'High Performance', not 'Balanced' --
you should be able to find info about those settings by searching the
net etc.
The second issue has been much more problematic -- it appears to us,
that in v17 (at least), 4D Server is capable of autonomously setting the
'Reject New Connections' option, without user input. That is, we've
seen a significant number of client disconnections, where upon
investigation we've seen that the '... New Connections' button on the
Application Server page of the Administration Window has been reading
'Accept New Connections', indicating that the server is NO LONGER
accepting connections. Every time we then use the server UI to click
this button, the Server application crashes in a most unladylike manner.
Tim Nevels (if I recall correctly), reported to us a couple of months
ago that he'd seen the same issue, once.
We've been working with 4D Australia, and forwarding info to 4D France
to try and find out under what circumstances the internal server engine
will change the text on that button from 'Reject New Connections' to
'Accept New Connections', but so far 4D France appears to be unwilling
to share that info. I figure it may not necessarily be a bug in 4D, but
if we knew what conditions triggered the behavior we might be able to
solve the problem if it's environmental. That is, somehow the engine is
recognising that there's a condition where there are no new connections
being accepted, and so it changes the text on the button to 'Accept New
Connections, without a user actually pressing that button.
Previously I thought we were going mad, and that there should be no need
for the server engine to be able to autonomously change the text on that
button, other than when a user actually clicks the button, however if
you look at the documentation for v17R4 you'll see that there is a new
REJECT NEW CONNECTIONS command coming..... maybe someone has been
working on this internal code for a while and has changed something....?
We now ensure, for the time being, that the DBA leaves the Application
Server page of the Administration Window open at all times, so that we
can see if the button text has changed when they report massed client
disconnections.
This is an ongoing nightmare for us. :-(
Cheers,
Allan Udy
Golden Micro Solutions Ltd, Blenheim, New Zealand
http://www.golden.co.nz<http://www.golden.co.nz>
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