GKSession alloc / release / alloc = leaks and crashes - iphone

Question

I've got an app that throws out the GKSession and makes a new one under various conditions (connection timeout, session fails, etc.). I'm getting memory leaks, though, and it sometimes crashes after a few loops through the reconnect.
Here's my code:
- (void) netConnect:(id) sender {
NSLog(#"allocating GKSession");
currentSession = [[GKSession alloc] initWithSessionID:nil displayName:nil sessionMode:GKSessionModePeer];
currentSession.delegate = self;
currentSession.available = YES;
currentSession.disconnectTimeout = 0;
[currentSession setDataReceiveHandler: self withContext:nil];
}
- (void) netDisconnect:(id) sender {
NSLog(#"DISCONNECTING BY REQUEST");
[currentSession disconnectFromAllPeers];
[currentSession setAvailable:NO];
[currentSession setDelegate:nil];
[currentSession setDataReceiveHandler:nil withContext:nil];
[currentSession release];
currentSession = nil;
}
There's a timer that waits for a successful connection; if it doesn't get one, netDisconnect is called, followed by netConnect again after a 5-second NSTimer delay.
I'm getting leaked GKList, GKTable, and GKAutoPeerIDTable objects, and crashes like this (always occurs after the alloc) :
Date/Time: 2010-09-05 09:35:59.426 -0700
OS Version: iPhone OS 4.0.2 (8A400)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000a
Crashed Thread: 0
Thread 0 Crashed:
0 libobjc.A.dylib 0x0000286c objc_msgSend + 16
1 CoreFoundation 0x000756ea __CFCopyFormattingDescription + 174
2 CoreFoundation 0x00081c8e __CFStringAppendFormatCore + 8666
3 CoreFoundation 0x000146ac _CFStringCreateWithFormatAndArgumentsAux + 64
4 CoreFoundation 0x00014660 CFStringCreateWithFormatAndArguments + 16
5 CoreFoundation 0x0001463c CFStringCreateWithFormat + 16
6 SystemConfiguration 0x00003272 SCDynamicStoreCreateWithOptions + 62
7 SystemConfiguration 0x000033d0 SCDynamicStoreCreate + 12
8 GameKitServices 0x000020ce gckRegisterForNetworkChanges + 154
9 GameKitServices 0x000035c0 GCKSessionCreate + 788
10 GameKitServices 0x00035e7a -[GKSessionInternal initWithSessionID:displayName:session:sessionMode:] + 274
11 GameKit 0x0000fda8 -[GKSession initWithSessionID:displayName:sessionMode:] + 76
Here's another one:
Sun Sep 5 10:28:52 thinner someapp[424] <Warning>: allocating GKSession
Sun Sep 5 10:28:52 thinner someapp[424] <Error>: -[__NSCFData UTF8String]: unrecognized selector sent to instance 0x10a710
Sun Sep 5 10:28:52 thinner someapp[424] <Error>: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFData UTF8String]: unrecognized selector sent to instance 0x10a710'
*** Call stack at first throw:
(
0 CoreFoundation 0x31a9ffd3 __exceptionPreprocess + 114
1 libobjc.A.dylib 0x3428a8a5 objc_exception_throw + 24
2 CoreFoundation 0x31aa3a77 -[NSObject(NSObject) doesNotRecognizeSelector:] + 102
3 CoreFoundation 0x31aa2f15 ___forwarding___ + 508
4 CoreFoundation 0x31a35680 _CF_forwarding_prep_0 + 48
5 GameKitServices 0x327aff13 -[GKSessionInternal initWithSessionID:displayName:session:sessionMode:] + 426
6 GameKit 0x31c15daf -[GKSession initWithSessionID:displayName:sessionMode:] + 82
7 someapp 0x0000584b -[MainViewController netConnect:] + 126
Questions:
• Is this the right way to release and re-allocate GKSessions?
• Should I not be tearing down and re-allocating GKSessions between connections to begin with?

Answer 1

This is a known issue. The workaround is to not pass in nil for the sessionID:
[[GKSession alloc] initWithSessionID:#"com.put.something.here" displayName:nil sessionMode:GKSessionModePeer];