Hi Chuck,
many thanks for your answer.
Am 13.09.2012 20:06, schrieb Chuck Hill:
Hi Susanne,
On 2012-09-13, at 8:57 AM, Susanne Schneider wrote:
Hi all,
please allow me to add one question regarding this interesting topic.
Alexis Tual (my mail client has problem with correct quoting) has suggested for
EOF background handling:
<snip>
ec.lock();
try {
// huge loop to compute stats
for (i = 0; i < 1000000; i++) {
// doing stuff with ec...
// cycling the ec
if (i % 100 == 0) {
ec.unlock();
ec.dispose();
ec = newEditingContextForMyWork();
ec.lock();
}
}
} finally {
ec.unlock();
}
</snip>
Now my question: is it correct to dispose the ec after unlock or would it be
better to do this beforehand, like:
ec.dipsose();
ec.unlock();
It is correct to unlock it before disposing it.
Good to know, we will do it this way.
If I turn on the ec-lock logging in my application, there are many remarks from the
Finalizers like: "*** EOEditingContext: access with no lock: _eoForGID()!" Is
this a real problem or can it be ignored?
I am not sure, can you send the full stack trace?
There is nor real exception, just the logging message. We have turned on
debugging with
NSLog.debug.setAllowedDebugLevel(NSLog.DebugLevelInformational);
NSLog.allowDebugLoggingForGroups(NSLog.DebugGroupMultithreading);
EOObjectStore._resetAssertLock();
in the application constructor because we were experiencing sporadic
deadlocks and hoped to get some information of any EC locking problem
that way. Besides other information (about real unlocked ec usage) this
results in messages like
[120726 18:54:07] DEBUG <Finalizer> com.webobjects - ***
EOEditingContext: access with no lock: _eoForGID()!
at random intervals (whenever the garbage collection is done). There
seem to be nothing related to this message. Explicitly disposing any
local ec seems to help regarding this special message. But because I am
not so familiar with the EOF internals, I was not sure if this is a real
problem or just too chatty logging.
Best regards.
Susanne
--
Susanne Schneider
Coordinator secuTrial Development
iAS interActive Systems GmbH
Dieffenbachstraße 33 c, D-10967 Berlin
fon +49(0)30 22 50 50 - 498
fax +49(0)30 22 50 50 - 451
mail susanne.schnei...@interactive-systems.de
web http://www.interActive-Systems.de
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