Re: Possible leak from NSURLConnection sendSynchronousRequest on iPhone

So it turns out we were aware of this issue, and we know what's wrong.  We should address this at some point in the future, but for now please stick with the asynchronous version of the API to avoid the leak.  Alternatively, I believe that turning off the NSURLCache on a per request basis may work around this.

Please let me know if either of those two don't work for you.

thanks!

On Nov 10, 2008, at 3:18 PM, Mark Pauley wrote:

That's interesting.  It could be a leak... what API are you using?

It's interesting that it only happens with sendSynchronousRequest:returningResponse:error...

I'll mock up a quick test to see if I can't reproduce.

On Nov 10, 2008, at 2:27 PM, Ladd Van Tol wrote:

So I have an iPhone app that makes a number of threaded calls to -[NSURLConnection sendSynchronousRequest:returningResponse:error:]. When I run the app on the device with the Leaks instrument, I get a periodic 3.5KB leak. So far I haven't been able to tie this leak back to any specific network calls on my part, owing to the async nature of the CF networking stuff.

Instruments reports the attached stack trace.

Any thoughts? Is this a real leak?

Thanks,

Ladd

33 libSystem.B.dylib   17.50 Kb     malloc

32 libSystem.B.dylib   17.50 Kb     pthread_create

31 libSystem.B.dylib   10.50 Kb     si_async_call

30 libSystem.B.dylib   10.50 Kb     getaddrinfo_async_call

29 libSystem.B.dylib   10.50 Kb     getaddrinfo_async_start

28 CFNetwork   10.50 Kb     _CreateMasterAddressLookup

27 CFNetwork   10.50 Kb     CFHostStartInfoResolution

26 CFNetwork   10.50 Kb     CFHostStartInfoResolution

25 CFNetwork   10.50 Kb     _ScheduleAndStartLookup

24 CFNetwork   10.50 Kb     _SocketStreamStartLookupForOpen_NoLock

23 CFNetwork   10.50 Kb     _SocketStreamOpen

22 CoreFoundation   10.50 Kb     _CFStreamOpen

21 CoreFoundation   10.50 Kb     CFWriteStreamOpen

20 CFNetwork   10.50 Kb     httpWrFilterOpen

19 CoreFoundation   10.50 Kb     _CFStreamOpen

18 CoreFoundation   10.50 Kb     CFWriteStreamOpen

17 CFNetwork   10.50 Kb     scheduleNewRequest

16 CFNetwork   10.50 Kb     _CFNetConnectionEnqueue_internal

15 CFNetwork   10.50 Kb     _CFNetConnectionEnqueue

14 CFNetwork   10.50 Kb     httpStreamOpen

13 CoreFoundation   10.50 Kb     _CFStreamOpen

12 CoreFoundation   10.50 Kb     CFReadStreamOpen

11 CFNetwork   10.50 Kb     createAndOpenStream

10 CFNetwork   10.50 Kb     httpProtocolStart

9 CFNetwork   10.50 Kb     CFURLProtocolStartLoad

8 CFNetwork   10.50 Kb     _CFURLConnectionProcessServerEvents

7 CFNetwork   10.50 Kb     muxerSourcePerform

6 CoreFoundation   10.50 Kb     CFRunLoopRunSpecific

5 CoreFoundation   10.50 Kb     CFRunLoopRunInMode

4 Foundation   10.50 Kb     +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:]

3 Foundation   10.50 Kb     -[NSThread main]

2 Foundation   10.50 Kb     __NSThread__main__

1 libSystem.B.dylib   10.50 Kb     _pthread_body

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