我正在使用DigitalDj的AudioStreamer项目（https://github.com/DigitalDJ/AudioStreamer）在我的应用程序中在后台传输音频。当应用程序位于前台时，一切正常，但有时它会在后台崩溃。这是一个非常奇怪的崩溃日志。
Incident Identifier: F6F6B97C-1943-460D-8A4E-5608B47E6989
CrashReporter Key: 3a88f20a9e18f468445bddc212b7aa673c6dc89b
Hardware Model: iPod4,1
Process: iMixtapes [1075]
Path: /var/mobile/Applications/7C64D2D8-0C63-4A73-8452-763209481693/iMixtapes.app/iMixtapes
Identifier: iMixtapes
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2011-02-18 13:24:15.849 +0530
OS Version: iPhone OS 4.2.1 (8C148)
Report Version: 104
Exception Type: 00000020
Exception Codes: 0x8badf00d
Highlighted Thread: 6
Application Specific Information:
iMixtapes[1075] has active assertions beyond permitted time:
{(
<SBProcessAssertion: 0x66ce420> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66f2970> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66c60b0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b4970> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66c7850> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66e55a0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66c5e40> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b47d0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66eaba0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66ebfe0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66f1da0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66afb90> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b18b0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x275940> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b1820> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x2c88a0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b7b70> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b7700> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66c6230> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66793a0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66ad010> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66c7820> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b7d20> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b7180> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66f2530> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66f2720> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b72a0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66f21e0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66f2650> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b73c0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b7830> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x6691270> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66c6010> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66b1ac0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x2733f0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0x66e74e0> identifier: UIKitBackgroundCompletionTask process: iMixtapes[1075] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1075 preventSuspend preventIdleSleep
)}
Elapsed total CPU time (seconds): 86.390 (user 41.340, system 45.050), 14% CPU
Elapsed application CPU time (seconds): 6.290, 1% CPU
Thread 0:
0 libSystem.B.dylib 0x31093268 mach_msg_trap + 20
1 libSystem.B.dylib 0x31095354 mach_msg + 44
2 CoreFoundation 0x30416648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x30415ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x30415c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x30415b88 CFRunLoopRunInMode + 52
6 GraphicsServices 0x31eec4a4 GSEventRunModal + 108
7 GraphicsServices 0x31eec550 GSEventRun + 56
8 UIKit 0x313cf322 -[UIApplication _run] + 406
9 UIKit 0x313cce8c UIApplicationMain + 664
10 iMixtapes 0x00002348 main (main.m:14)
11 iMixtapes 0x000022fc start + 32
Thread 1:
0 libSystem.B.dylib 0x310bf974 kevent + 24
1 libSystem.B.dylib 0x31169704 _dispatch_mgr_invoke + 88
2 libSystem.B.dylib 0x31169174 _dispatch_queue_invoke + 96
3 libSystem.B.dylib 0x31168b98 _dispatch_worker_thread2 + 120
4 libSystem.B.dylib 0x3110d24a _pthread_wqthread + 258
5 libSystem.B.dylib 0x31105970 start_wqthread + 0
Thread 2:
0 libSystem.B.dylib 0x31093268 mach_msg_trap + 20
1 libSystem.B.dylib 0x31095354 mach_msg + 44
2 CoreFoundation 0x30416648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x30415ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x30415c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x30415b88 CFRunLoopRunInMode + 52
6 WebCore 0x35b32124 RunWebThread(void*) + 332
7 libSystem.B.dylib 0x3110c886 _pthread_start + 242
8 libSystem.B.dylib 0x31101a88 thread_start + 0
Thread 3:
0 libSystem.B.dylib 0x31093268 mach_msg_trap + 20
1 libSystem.B.dylib 0x31095354 mach_msg + 44
2 CoreFoundation 0x30416648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x30415ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x30415c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x30415b88 CFRunLoopRunInMode + 52
6 Foundation 0x302fb5f6 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 206
7 Foundation 0x302d9192 -[NSThread main] + 38
8 Foundation 0x302d2242 __NSThread__main__ + 966
9 libSystem.B.dylib 0x3110c886 _pthread_start + 242
10 libSystem.B.dylib 0x31101a88 thread_start + 0
Thread 4:
0 libSystem.B.dylib 0x3110b9f0 __semwait_signal + 24
1 libSystem.B.dylib 0x310c07ec _pthread_cond_wait + 748
2 libSystem.B.dylib 0x310c03d2 pthread_cond_wait + 26
3 CoreMedia 0x3290cb14 WaitOnCondition + 4
4 CoreMedia 0x3290ca5a FigSemaphoreWaitRelative + 66
5 MediaToolbox 0x32a8bc9c fpa_AsyncMovieControlThread + 48
6 CoreMedia 0x32928f76 figThreadMain + 166
7 libSystem.B.dylib 0x3110c886 _pthread_start + 242
8 libSystem.B.dylib 0x31101a88 thread_start + 0
Thread 5:
0 libSystem.B.dylib 0x310b768c select$DARWIN_EXTSN + 20
1 CoreFoundation 0x3044d662 __CFSocketManager + 582
2 libSystem.B.dylib 0x3110c886 _pthread_start + 242
3 libSystem.B.dylib 0x31101a88 thread_start + 0
Thread 6:
0 libSystem.B.dylib 0x3110b9f0 __semwait_signal + 24
1 libSystem.B.dylib 0x310c07ec _pthread_cond_wait + 748
2 libSystem.B.dylib 0x310c03d2 pthread_cond_wait + 26
3 iMixtapes 0x000946d8 -[AudioStreamer enqueueBuffer] (AudioStreamer.m:1885)
4 iMixtapes 0x00095514 -[AudioStreamer handleAudioPackets:numberBytes:numberPackets:packetDescriptions:] (AudioStreamer.m:2196)
5 iMixtapes 0x0008f4ce MyPacketsProc (AudioStreamer.m:151)
6 AudioToolbox 0x3281e376 AudioFileStreamWrapper::CallPacketsProc(unsigned long, unsigned long, void const*, AudioStreamPacketDescription*, bool) + 122
7 AudioToolbox 0x3283a87a MP3AudioStream::GeneratePackets(AudioFileStreamContinuation&) + 818
8 AudioToolbox 0x3281e5e4 AudioFileStreamWrapper::ParseBytes(unsigned long, void const*, unsigned long) + 180
9 AudioToolbox 0x3281de6c AudioFileStreamParseBytes + 132
10 iMixtapes 0x0009410e -[AudioStreamer handleReadFromStream:eventType:] (AudioStreamer.m:1754)
11 iMixtapes 0x0008f58e ASReadStreamCallBack (AudioStreamer.m:222)
12 CoreFoundation 0x3044ef6a _signalEventSync + 70
13 CoreFoundation 0x3044f842 _cfstream_solo_signalEventSync + 58
14 CoreFoundation 0x3044c7ee _CFStreamSignalEvent + 326
15 CoreFoundation 0x3044c6a0 CFReadStreamSignalEvent + 4
16 CFNetwork 0x32fe2a66 HTTPReadStream::streamEvent(unsigned long) + 94
17 CFNetwork 0x32fe2adc HTTPReadStream::_streamCB(__CFReadStream*, unsigned long, void*) + 24
18 CoreFoundation 0x3044ef6a _signalEventSync + 70
19 CoreFoundation 0x3044eefe _cfstream_shared_signalEventSync + 198
20 CoreFoundation 0x304447d6 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 6
21 CoreFoundation 0x304165b0 __CFRunLoopDoSources0 + 376
22 CoreFoundation 0x30415e54 __CFRunLoopRun + 224
23 CoreFoundation 0x30415c80 CFRunLoopRunSpecific + 224
24 CoreFoundation 0x30415b88 CFRunLoopRunInMode + 52
25 Foundation 0x302d28e4 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 196
26 iMixtapes 0x00091000 -[AudioStreamer startInternal] (AudioStreamer.m:843)
27 Foundation 0x302d9192 -[NSThread main] + 38
28 Foundation 0x302d2242 __NSThread__main__ + 966
29 libSystem.B.dylib 0x3110c886 _pthread_start + 242
30 libSystem.B.dylib 0x31101a88 thread_start + 0
Thread 7:
0 libSystem.B.dylib 0x31093268 mach_msg_trap + 20
1 libSystem.B.dylib 0x31095354 mach_msg + 44
2 CoreFoundation 0x30416648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x30415ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x30415c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x30415b88 CFRunLoopRunInMode + 52
6 AudioToolbox 0x327a84ba GenericRunLoopThread::RunLoop() + 30
7 AudioToolbox 0x327bb306 TRunLoop<AQClient>::Entry(void*) + 90
8 AudioToolbox 0x327a81d2 CAPThread::Entry(CAPThread*) + 138
9 libSystem.B.dylib 0x3110c886 _pthread_start + 242
10 libSystem.B.dylib 0x31101a88 thread_start + 0
Unknown thread crashed with unknown flavor: 5, state_count: 1
任何人都可以帮我解决这个问题。
由于
答案 0 :(得分：1)
您的应用程序正在终止，而辅助线程继续工作。你需要清理并彻底终止。
注意：你可以象征你的崩溃，更轻松地评估一下callstack。
答案 1 :(得分：0)
如果您正在使用
创建后台任务以播放音频- beginBackgroundTaskWithExpirationHandler:
确保您在从操作系统收到无效通知时编码以结束任务。
如果你没有处理它会导致你上面提到的崩溃。