As an important note, I decided to try changing from an SQLite store
to an XML store. No more crashing!
I'd really like to use SQLite, though, in this program. I have no
clue where to look for info on SQLite compatibility with particular
types of data, though, if that is indeed the issue. If I missed a
document, I'd love to have a link. :)
Cheers,
Andrew
On Feb 27, 2008, at 8:15 PM, Andrew Merenbach wrote:
Hi, all,
I made a discovery today: a program of mine, which has multiple
document types, freezes upon saving for a second time after changes
have been made (following a first save). I tried interrupting using
GDB, and I also tried using Spin Control. Below is (what I think is
relevant) from what Spin Control displayed.
* Details of a common example: My program maintains a list of
entries in a table view using Core Data entities in an
NSArrayController subclass. If after my first save I add an entry
and then delete it, my program will save again without freezing. If
I add one and do not delete it, it will cause a freeze-up.
A search for the words "core," "data," and "hang" yielded an
interesting discussion on saving to a persistent store, but failed
to find anything that I thought was relevant to my situation.
I am using Leopard and Xcode 3. I would be happy to post relevant
code, if only I knew what code (out of more than eighty files) to
post. This problem may very well be with my code, but I have no
clue where to look. Basically, I suppose that I'm asking: what sort
of programming error would yield a hang involving a call to -
[NSSQLiteConnection execute] (as you might see below)? My actions
before the hang involve new items being added through -
[NSArrayController add:].
Any ideas would be helpful!
Cheers,
Andrew
Call graph:
742 Thread_4d03
742 start
742 main
742 NSApplicationMain
742 -[NSApplication run]
742 -[NSApplication sendEvent:]
742 -[NSApplication _handleKeyEquivalent:]
742 -[NSMenu performKeyEquivalent:]
742 -[NSCarbonMenuImpl
performActionWithHighlightingForItemAtIndex:]
742 -[NSMenu performActionForItemAtIndex:]
742 -[NSApplication sendAction:to:from:]
742 -[NSDocument
saveDocumentWithDelegate:didSaveSelector:contextInfo:]
742 -[NSDocument
saveToURL:ofType:forSaveOperation:delegate:didSaveSelector:contextInfo
:]
742 -[NSDocument
_saveToURL:ofType:forSaveOperation:delegate:didSaveSelector:contextInfo
:]
742 -[NSDocument
saveToURL:ofType:forSaveOperation:error:]
742 -[NSPersistentDocument
writeSafelyToURL:ofType:forSaveOperation:error:]
742 -[DLBasicDocument
writeToURL:ofType:forSaveOperation:originalContentsURL:error:]
742 -[NSPersistentDocument
writeToURL:ofType:forSaveOperation:originalContentsURL:error:]
742 -[NSManagedObjectContext
save:]
742 -
[NSPersistentStoreCoordinator(_NSInternalMethods)
executeRequest:withContext:]
742 -[NSSQLCore
executeRequest:withContext:]
742 -[NSSQLCore
saveChanges:]
742 -[NSSQLCore
performChanges]
742 -[NSSQLCore
_performChangesWithAdapterOps:]
742 -
[NSSQLConnection performAdapterOperations:]
742 -
[NSSQLiteConnection insertRow:]
742 -
[NSSQLiteConnection execute]
742 _execute
482 usleep
$UNIX2003
482
nanosleep$UNIX2003
482
__semwait_signal
482
__semwait_signal
260
sqlite3_step
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