Re: Strange EOF exception
Re: Strange EOF exception
- Subject: Re: Strange EOF exception
- From: Ulrich Köster <email@hidden>
- Date: Thu, 22 Jan 2004 17:34:44 +0100
Hi,
may be I'm totally wrong but shouldn't it be
eo.setVal(EOKeyValueCoding.NullValue);
instead of
eo.setVal(null);
Ulrich
Am 22.01.2004 um 17:23 schrieb Pierre Bernard:
> Hi!
>
> My colleague's sample code reads like this:
>
> private void testEditingContext() {
> boolean isLocking = true;
>
> EOEditingContext ec = new EOEditingContext();
> try {
> if (isLocking)
> ec.lock();
> NSArray allEOs = EOUtilities.objectsForEntityNamed(ec,
> "TestEntity");
> NSLog.out.appendln("fetched " + allEOs.count() + "
> objects");
> TestEntity eo = (TestEntity) allEOs.lastObject();
> NSLog.out.appendln("eo = " + eo);
>
> eo.setVal(null);
>
> try {
> ec.saveChanges();
> } catch (NSValidation.ValidationException ve) {
> ve.printStackTrace();
> }
>
> NSLog.out.appendln("ec.hasChanges ? " + ec.hasChanges());
> NSLog.out.appendln("ec.updatedObjects = " +
> ec.updatedObjects());
>
> ec.deleteObject(eo);
> ec.saveChanges();
> } catch (Exception e) {
> e.printStackTrace();
> } finally {
> if (isLocking)
> ec.unlock();
> }
> }
>
> TestEntity has a validateForSave() method which always throws a
> validation exception. Thus the first save attempt will always fail.
>
> We unfortunately have no longer have WO 5.2.1 installed anywhere.
>
> I guess the problem is with some clean-up happening or not as the
> first attempt at saveChanges() fails. Looks like some field is reset
> to null.If we are unlucky it might even be related to garbage
> collection. That would make the problem only randomly reproducible.
>
> I have no workaround, but will be glad to hear about any.
>
> Pierre.
>
> -----Original Message-----
> From: Ben Ketteridge [mailto:email@hidden]
> Sent: Thursday, January 22, 2004 5:11 PM
> To: Pierre Bernard
> Cc: WebObjects Developers; Apple WO Dev
> Subject: Re: Strange EOF exception
>
>
> Pierre Bernard wrote:
>> I was just about to write a bug report about this. Well, I will within
>> the next few days...
>>
>> I am seeing this if after saving an object failed over a validation
>> error
>> I attempt to delete the offinding object. A colleage has written a
>> test > case I still have to look into. It appears that the bug cannot
>> be
>> reproduced on a WebObjects 5.1.3 machine.
>>
>> I'd be glad to have more information about this. Let's hope someone at
>> Apple will feel this is worth a quick fix. Such unexpected crashes
>> are no
>> no good ... at all.
>
> Can you reproduce it under WO5.2.1?
>
> The operation where we see this error is certainly one where EOs are
> being deleted, though I'm not sure what validation our delete might be
> failing!
>
> Could it be contention? (I doubt it myself)
>
> Are you aware of any kind of workaround?
>
> --
> Kind Regards
> Ben.
>
> Dr Ben Ketteridge
> email@hidden
>
> Team Leader,
> ProAct International,
> PO Box 100, Denbigh, UK.
> Tel: 01745 817161 ext. 322
>
>
>
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