我在尝试打开2个单独的活动时发生了ANR。非常零星的，只有某些用户，无法在我们的任何测试硬件上进行复制。两个报告都有一系列不起眼的线程，我们正在等待通知程序锁定的两个后台线程。在两种情况下，主线程都是这样做的：
"main" prio=5 tid=1 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x41790710 self=0x41775c90
| sysTid=347 nice=0 sched=0/0 cgrp=apps handle=1074003964
| state=S schedstat=( 0 0 0 ) utm=10817 stm=2453 core=0
#00 pc 0001b6e4 /system/lib/libc.so (__ioctl+8)
#01 pc 0002be67 /system/lib/libc.so (ioctl+14)
#02 pc 0001b929 /system/lib/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+140)
#03 pc 0001c0c7 /system/lib/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+154)
#04 pc 00001451 /system/lib/libsystem_server.so (system_init+384)
#05 pc 00020b4c /system/lib/libdvm.so (dvmPlatformInvoke+112)
#06 pc 000516ab /system/lib/libdvm.so (dvmCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*)+398)
#07 pc 00029fe0 /system/lib/libdvm.so
#08 pc 0002e9a4 /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184)
#09 pc 00063aeb /system/lib/libdvm.so (dvmInvokeMethod(Object*, Method const*, ArrayObject*, ArrayObject*, ClassObject*, bool)+350)
#10 pc 0006b80f /system/lib/libdvm.so
#11 pc 00029fe0 /system/lib/libdvm.so
#12 pc 0002e9a4 /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184)
#13 pc 0006382d /system/lib/libdvm.so (dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+292)
#14 pc 0004d27f /system/lib/libdvm.so
#15 pc 0005477b /system/lib/libandroid_runtime.so
#16 pc 00055ca3 /system/lib/libandroid_runtime.so (android::AndroidRuntime::start(char const*, char const*)+378)
#17 pc 0000105b /system/bin/app_process
#18 pc 0000ddf7 /system/lib/libc.so (__libc_init+50)
#19 pc 00000d7c /system/bin/app_process
at com.android.server.SystemServer.init1(Native Method)
at com.android.server.SystemServer.main(SystemServer.java:2012)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
at dalvik.system.NativeStart.main(Native Method)
这是app dump：
"AsyncTask #4" prio=5 tid=17 WAIT
| group="main" sCount=1 dsCount=0 obj=0x424f4178 self=0x5bad64c8
| sysTid=2943 nice=0 sched=0/0 cgrp=apps handle=1537449072
| schedstat=( 0 0 0 ) utm=0 stm=0 core=0
at java.lang.Object.wait(Native Method)
- waiting on <0x424f4298> (a java.lang.VMThread) held by tid=17 (AsyncTask #4)
at java.lang.Thread.parkFor(Thread.java:1231)
at sun.misc.Unsafe.park(Unsafe.java:323)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2022)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:413)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1009)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1069)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
"Thread-8753" prio=5 tid=1 VMWAIT
| group="main" sCount=1 dsCount=0 obj=0x42647520 self=0x413fa188
| sysTid=2903 nice=0 sched=0/0 cgrp=apps handle=1074526288
| schedstat=( 0 0 0 ) utm=27 stm=8 core=0
#00 pc 0000dce0 /system/lib/libc.so (__futex_syscall3+8)
#01 pc 00012ef4 /system/lib/libc.so (__pthread_cond_timedwait_relative+48)
#02 pc 00012f50 /system/lib/libc.so (__pthread_cond_timedwait+60)
#03 pc 0004b12f /system/lib/libdvm.so
#04 pc 0004e191 /system/lib/libandroid_runtime.so (android::AndroidRuntime::start(char const*, char const*)+416)
#05 pc 00000dcf /system/bin/app_process
#06 pc 000171d3 /system/lib/libc.so (__libc_init+38)
#07 pc 00000b34 /system/bin/app_process
at dalvik.system.NativeStart.run(Native Method)
"AsyncTask #3" prio=5 tid=15 WAIT
| group="main" sCount=1 dsCount=0 obj=0x424dc8a0 self=0x5c0252c0
| sysTid=2941 nice=0 sched=0/0 cgrp=apps handle=1516141776
| schedstat=( 0 0 0 ) utm=0 stm=0 core=0
at java.lang.Object.wait(Native Method)
- waiting on <0x424dc9c0> (a java.lang.VMThread) held by tid=15 (AsyncTask #3)
at java.lang.Thread.parkFor(Thread.java:1231)
at sun.misc.Unsafe.park(Unsafe.java:323)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2022)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:413)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1009)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1069)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
"Thread-8740" prio=5 tid=10 WAIT
| group="main" sCount=1 dsCount=0 obj=0x424860c8 self=0x5a5e1d88
| sysTid=2929 nice=0 sched=0/0 cgrp=apps handle=1543661352
| schedstat=( 0 0 0 ) utm=0 stm=0 core=1
at java.lang.Object.wait(Native Method)
- waiting on <0x42486340> (a java.lang.VMThread) held by tid=10 (Thread-8740)
at java.lang.Thread.parkFor(Thread.java:1231)
at sun.misc.Unsafe.park(Unsafe.java:323)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2022)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:413)
at com.my_foo2.Bluetooth.ModelAccessorNew$SingleStuffProcessingThread.run(ModelAccessorNew.java:139)
"pool-1-thread-2" prio=5 tid=13 WAIT
| group="main" sCount=1 dsCount=0 obj=0x421cb830 self=0x5a5e1730
| sysTid=2927 nice=0 sched=0/0 cgrp=apps handle=1094606048
| schedstat=( 0 0 0 ) utm=11 stm=4 core=0
at java.lang.Object.wait(Native Method)
- waiting on <0x421cbd98> (a java.lang.VMThread) held by tid=13 (pool-1-thread-2)
at java.lang.Thread.parkFor(Thread.java:1231)
at sun.misc.Unsafe.park(Unsafe.java:323)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2022)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:413)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1009)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1069)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
"Thread-8735" prio=5 tid=12 WAIT
| group="main" sCount=1 dsCount=0 obj=0x4216e7f0 self=0x413e4f20
| sysTid=2926 nice=0 sched=0/0 cgrp=apps handle=1094604160
| schedstat=( 0 0 0 ) utm=0 stm=0 core=1
at java.lang.Object.wait(Native Method)
- waiting on <0x4216e918> (a java.lang.Object)
at java.lang.Object.wait(Object.java:364)
at com.my_foo2.Persistence.Factories.StuffFactory$CalculationThread.run(StuffFactory.java:97)
"pool-1-thread-1" prio=5 tid=11 WAIT
| group="main" sCount=1 dsCount=0 obj=0x42144498 self=0x413e46d0
| sysTid=2924 nice=0 sched=0/0 cgrp=apps handle=1094601544
| schedstat=( 0 0 0 ) utm=18 stm=5 core=0
at java.lang.Object.wait(Native Method)
- waiting on <0x421447e8> (a java.lang.VMThread) held by tid=11 (pool-1-thread-1)
at java.lang.Thread.parkFor(Thread.java:1231)
at sun.misc.Unsafe.park(Unsafe.java:323)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2022)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:413)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1009)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1069)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
"Binder_2" prio=5 tid=9 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x42097bd8 self=0x5183e668
| sysTid=2915 nice=0 sched=0/0 cgrp=apps handle=1538927224
| schedstat=( 0 0 0 ) utm=0 stm=0 core=1
#00 pc 0000cbd0 /system/lib/libc.so (__ioctl+8)
#01 pc 00028035 /system/lib/libc.so (ioctl+16)
#02 pc 00016b6d /system/lib/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+124)
#03 pc 0001731f /system/lib/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+154)
#04 pc 0001af55 /system/lib/libbinder.so
#05 pc 00011087 /system/lib/libutils.so (android::Thread::_threadLoop(void*)+114)
#06 pc 0004c985 /system/lib/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+44)
#07 pc 00010bed /system/lib/libutils.so
#08 pc 00012eb0 /system/lib/libc.so (__thread_entry+48)
#09 pc 00012608 /system/lib/libc.so (pthread_create+172)
at dalvik.system.NativeStart.run(Native Method)
"Binder_1" prio=5 tid=8 NATIVE
| group="main" sCount=1 dsCount=0 obj=0x420978a8 self=0x5183e010
| sysTid=2914 nice=0 sched=0/0 cgrp=apps handle=1538927416
| schedstat=( 0 0 0 ) utm=0 stm=0 core=0
#00 pc 0000cbd0 /system/lib/libc.so (__ioctl+8)
#01 pc 00028035 /system/lib/libc.so (ioctl+16)
#02 pc 00016b6d /system/lib/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+124)
#03 pc 0001731f /system/lib/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+154)
#04 pc 0001af55 /system/lib/libbinder.so
#05 pc 00011087 /system/lib/libutils.so (android::Thread::_threadLoop(void*)+114)
#06 pc 0004c985 /system/lib/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+44)
#07 pc 00010bed /system/lib/libutils.so
#08 pc 00012eb0 /system/lib/libc.so (__thread_entry+48)
#09 pc 00012608 /system/lib/libc.so (pthread_create+172)
at dalvik.system.NativeStart.run(Native Method)
"FinalizerWatchdogDaemon" daemon prio=5 tid=7 WAIT
| group="system" sCount=1 dsCount=0 obj=0x420940e8 self=0x412487a8
| sysTid=2913 nice=0 sched=0/0 cgrp=apps handle=1538927528
| schedstat=( 0 0 0 ) utm=0 stm=0 core=0
at java.lang.Object.wait(Native Method)
- waiting on <0x41414ec8> (a java.lang.Daemons$FinalizerWatchdogDaemon)
at java.lang.Object.wait(Object.java:364)
at java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:214)
at java.lang.Thread.run(Thread.java:856)
"FinalizerDaemon" daemon prio=5 tid=6 WAIT
| group="system" sCount=1 dsCount=0 obj=0x42093f90 self=0x41248358
| sysTid=2912 nice=0 sched=0/0 cgrp=apps handle=1538927616
| schedstat=( 0 0 0 ) utm=0 stm=0 core=0
at java.lang.Object.wait(Native Method)
- waiting on <0x41403690> (a java.lang.ref.ReferenceQueue)
at java.lang.Object.wait(Object.java:401)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:102)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:73)
at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:169)
at java.lang.Thread.run(Thread.java:856)
"ReferenceQueueDaemon" daemon prio=5 tid=5 WAIT
| group="system" sCount=1 dsCount=0 obj=0x42093e28 self=0x5bb9f218
| sysTid=2911 nice=0 sched=0/0 cgrp=apps handle=1538927752
| schedstat=( 0 0 0 ) utm=0 stm=0 core=0
at java.lang.Object.wait(Native Method)
- waiting on <0x414035b8>
at java.lang.Object.wait(Object.java:364)
at java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:129)
at java.lang.Thread.run(Thread.java:856)
"Compiler" daemon prio=5 tid=4 VMWAIT
| group="system" sCount=1 dsCount=0 obj=0x42093d38 self=0x400173b8
| sysTid=2910 nice=0 sched=0/0 cgrp=apps handle=1087627008
| schedstat=( 0 0 0 ) utm=9 stm=4 core=1
#00 pc 0000dce0 /system/lib/libc.so (__futex_syscall3+8)
#01 pc 00012ef4 /system/lib/libc.so (__pthread_cond_timedwait_relative+48)
#02 pc 00012f50 /system/lib/libc.so (__pthread_cond_timedwait+60)
#03 pc 0006e7d7 /system/lib/libdvm.so
#04 pc 0005425b /system/lib/libdvm.so
#05 pc 00012eb0 /system/lib/libc.so (__thread_entry+48)
#06 pc 00012608 /system/lib/libc.so (pthread_create+172)
at dalvik.system.NativeStart.run(Native Method)
"Signal Catcher" daemon prio=5 tid=3 RUNNABLE
| group="system" sCount=0 dsCount=0 obj=0x42093c40 self=0x40cfa8a8
| sysTid=2909 nice=0 sched=0/0 cgrp=apps handle=1087816224
| schedstat=( 0 0 0 ) utm=1 stm=0 core=0
at dalvik.system.NativeStart.run(Native Method)
"GC" daemon prio=5 tid=2 VMWAIT
| group="system" sCount=1 dsCount=0 obj=0x42093b60 self=0x40d6bdd0
| sysTid=2907 nice=0 sched=0/0 cgrp=apps handle=1538927840
| schedstat=( 0 0 0 ) utm=0 stm=0 core=0
#00 pc 0000dce0 /system/lib/libc.so (__futex_syscall3+8)
#01 pc 00012ef4 /system/lib/libc.so (__pthread_cond_timedwait_relative+48)
#02 pc 00012f50 /system/lib/libc.so (__pthread_cond_timedwait+60)
#03 pc 0006d5db /system/lib/libdvm.so
#04 pc 0005425b /system/lib/libdvm.so
#05 pc 00012eb0 /system/lib/libc.so (__thread_entry+48)
#06 pc 00012608 /system/lib/libc.so (pthread_create+172)
at dalvik.system.NativeStart.run(Native Method)
----- end 2903 -----
另一件奇怪的事情是，这是我看到的唯一用户代码。我已经跟踪了这两个线程的起始位置以及它在各种活动的onCreate事件期间，但是活动本身没有运行，或者至少在跟踪中不可见。任何想法都将不胜感激。