[Zope-DB] win32 odbc DA constantly losing connection

Alex Cowan alex@funcom.com
Wed, 26 Feb 2003 09:26:26 +0100

I guess the moral of the story is windows sucks for things you want to stay

However this may help, I had a similar problem with a local connection
forwarding DA, it kept closing for now apparent reason.

So I added this into the python script to be 100% sure it was open.

context.Zope_DA_Connection_name.connect('connection string')

connection string is not the name of the data source object, its the string
you use to connect to the actual data source (ie database@host:port username


----- Original Message -----
From: "T. Muddletin" <x@Vex.Net>
To: <zope-db@zope.org>
Sent: Wednesday, February 26, 2003 9:10 AM
Subject: [Zope-DB] win32 odbc DA constantly losing connection

> I've been having a very annoying time with zope's ODBC DA, on windows.
> After a half dozen or so queries it would lose its connection to a
> postgresql database (running on freebsd on the lan).
> When i'd try to re-"open" the database in zope i'd get "Invalid
> connection string: dsn" (where 'dsn' is the name of the odbc data
> source).
> Yet the data source is okay. Other apps maintain their connection. The
> only way i seem to get zope to reconnect though is to shut it down and
> restart it completely.
> In desperation searching for alternatives i finally got slightly old
> psycopg working using the binary found on zope.org at
> http://www.zope.org/Members/pvl/PsycopgWin32 and I was a (relatively)
> happy camper again... things seemed grand.
> And then suddenly this DA lost its connection also. Distressing!
> However, there was a difference... when i tried to re-open this
> connection i see the error: "psycopg.OperationalError FATAL: Sorry,
> too many clients already"
> AH!! So that's it! Now at least I know what seems to be the actual
> problem. I'm still not happy about the DA completely shutting down...
> what's it doing with all those other connections it is holding open?
> But at least now I can try to work with the problem and increase the
> connections available in postgresql or something.
> Bloody unhelpful ms ODBC error messages!
> Okay, back to work now.
> --
> Tim Middleton | Cain Gang Ltd | I have lived through whole tragedies
> x@veX.net     | www.Vex.Net   | without speaking a word. --Dost. (GC)
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