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objective-cparse-platformpfuserpffacebookutilsbftask

Parse login hang since Facebook 4.0.x with [PFFacebookUtils initializeFacebookWithApplicationLaunchOptions:launchOptions] (semaphore_wait_slow trap)

Since updating Facebook to v4.0.x and the latest Parse libraries, my app is hanging, seemingly when trying to log in the user.

My stack trace looks like this:

enter image description here

I had a very similar problem previously, answered here: Parse crash when calling [PFFacebookUtils initializeFacebook] - semaphore_wait_trap

However that solution no longer works, since it seems [PFUser currentUser] has been replaced with [PFUser(Private) _getCurrentUserWithOptions:] and [BFTask(Private) waitForResult:withMainThreadWarning:] where it gets stuck.

In my app, I've subclassed PFUser to a class called MPLUser, and overridden the user method. Not sure if this might be something to do with the issue?

+ (MPLUser *)user
{
    return (MPLUser *)[PFUser user];
}

Once this starts occurring, it becomes impossible to launch the app. However, I usually manage to launch the app a few times before the lock starts happening. It usually happens after a crash...

I'm using pod 'ParseFacebookUtilsV4' and have updates all libraries to latest versions.

UPDATE:

Here's more stack trace from another thread, that is seemingly trying to log on:

enter image description here enter image description here

I initialise Parse and Facebook in the following order. If I reverse the calls, it crashes: 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [self initDefaults];
    [self initialiseApplicationSpecifics];
    [self setupParseWithOptions:launchOptions];
    [self enableCrashReporting];
    [self setupIAPs]; 
//etc... 
}


- (void)initialiseApplicationSpecifics
{
    [Flurry setCrashReportingEnabled:YES];
    [self registerParseSubclasses];
    [ParseCrashReporting enable];
    [Parse enableLocalDatastore];
#ifdef MPL
    [Parse setApplicationId:@"xxxyyy"
                  clientKey:@"xxxyyy"];
    [Flurry startSession:@"xxxyyy"];
#elif MGM
    [Parse setApplicationId:@"yyyxxx"
                  clientKey:@"yyyxxx"];
    [Flurry startSession:@"yyyxxx"];
#endif
}

- (void)setupParseWithOptions:(NSDictionary *)launchOptions
{
    [PFFacebookUtils initializeFacebookWithApplicationLaunchOptions:launchOptions];
    [PFTwitterUtils initializeWithConsumerKey:@"aaaabbbb"
                               consumerSecret:@"bbbbaaaa"];
    [PFAnalytics trackAppOpenedWithLaunchOptions:launchOptions];
}
Solution

  • Seems to be fixed with parse 1.7.2

    According to v1.7.2 — April 27, 2015

    New: Local Data Sharing for Extensions and WatchKit. Improved nullability annotations for ParseFacebookUtils.
    Fixed: logOutInBackground with block callback not called on main thread. Fixed: Potential compilation error with using imports for PFSubclassing.h.
    Fixed: Not persistent currentUser if saving automatic user via saveEventually.
    Fixed: Rare deadlock scenario with using ParseFacebookUtils and currentUser.
    Fixed: Rare issue with pinning multiple objects in a row to the same pin.
    Fixed: Rare scenario when user could be not linked with Facebook.
    Improved performance and reliability of Local Datastore. Performance improvements.
    Other small bug fixes.