I think you are right or at least this is the impression I had the last time on this subject. I plan to move from MultiEC locking manager to ERXEC ec. As usual, I could be wrong..
----- Original Message -----
From: Matteo Centro
To: Paul Dunkler
Cc: webobjects-dev@lists.apple.com Dev Apple ; Wonder Project
Sent: Monday, July 09, 2012 6:47 PM
Subject: Re: [Wonder-disc] ERXEC and locking
Actually I noticed that removing all the locks (even the forgotten ones)
seems to have solved the problem... I had 100000 unique users on 22 instances
running for a day and no deadlocks.
Any thoughts about stuff that is done in the Session.terminate? I need to do
some cleanup if the session terminates, do I get automatic lock unlock in that
scenario or the termination happens in a separate thread and so I have to
manually lock/unlock?
Thanks,
Matteo
On Mon, Jul 9, 2012 at 12:19 PM, Paul Dunkler <paul.dunk...@xyrality.com>
wrote:
I recently "Wonderized" a legacy WO application and I have a strange race
condition that happens very rarely and only under extremely high load.
Application extends ERXApplication, Session extends ERXSession and so on,
I removed all "new EOEditingContext()" and replaced them with
ERXEC.newEditingContext()
but
I forgot to remove some ec.lock() and ec.unlock()
I am quite convinced that removing all locks and unlocks will bring me to
a non deadlocking situation but I still want some reassurements
I read a lot of stuff and I'm here to ask to you gurus a final word on
the locking rule I inferred from what I read:
If you always use ERXEC you can safely remove all lock and unlocks except
for stuff that happen in background threads...
Is it true?
I think yes, its true. We are actually using Wonder Editing Contexts only
and do not have any other locking stuff. Everything runs fine.
What about stuff that happens in session.terminate()? I would say that it
should have explicit lock/unlocks but any opinions are welcome.
Thanks,
Matteo
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