title: How Do you Interpret Android ANR Reports
body: <p>I've googled till my fingers were sore, but I couldn't figure out how to interpret the ANR reports that are sent to developers by Google.</p>
  
  <p>So at the top of the report, this intent is listed as the cause:</p>
  
  <pre><code>ANR Executing service blah.blah.removed.UpdateEpisodesFileDetails
  </code></pre>
  
  <p>With the following threads listed. (note that we have quite a few of these ANRs, and in every case File.deleteImpl is listed as what's running on the main thread, which seems to be a clue, but the intent listed doesn't do deleting):</p>
  
  <pre><code>DALVIK THREADS:
  (mutexes: tll=0 tsl=0 tscl=0 ghl=0 hwl=0 hwll=0)
  "main" prio=5 tid=1 NATIVE
    | group="main" sCount=1 dsCount=0 obj=0x40022268 self=0xcea0
    | sysTid=313 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=-1345006432
    | schedstat=( 6115674000 2882269000 4010 )
    at java.io.File.deleteImpl(Native Method)
    at java.io.File.delete(File.java:375)
    at au.com.shiftyjelly.pocketcasts.a.i.a(SourceFile:256)
    at au.com.shiftyjelly.pocketcasts.a.i.a(SourceFile:177)
    at au.com.shiftyjelly.pocketcasts.a.i.c(SourceFile:374)
    at au.com.shiftyjelly.pocketcasts.a.i.a(SourceFile:290)
    at au.com.shiftyjelly.pocketcasts.a.e.a(SourceFile:1)
    at au.com.shiftyjelly.pocketcasts.server.t.a(SourceFile:393)
    at au.com.shiftyjelly.pocketcasts.server.x.onPostExecute(SourceFile:1)
    at android.os.AsyncTask.finish(AsyncTask.java:417)
    at android.os.AsyncTask.access$300(AsyncTask.java:127)
    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3806)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
    at dalvik.system.NativeStart.main(Native Method)
  
  "AsyncTask #1" prio=5 tid=13 WAIT
    | group="main" sCount=1 dsCount=0 obj=0x4078adc0 self=0x415c80
    | sysTid=2601 nice=10 sched=0/0 cgrp=[fopen-error:2] handle=4283832
    | schedstat=( 270113000 194565000 1121 )
    at java.lang.Object.wait(Native Method)
    - waiting on &lt;0x4078b000&gt; (a java.lang.VMThread)
    at java.lang.Thread.parkFor(Thread.java:1424)
    at java.lang.LangAccessImpl.parkFor(LangAccessImpl.java:48)
    at sun.misc.Unsafe.park(Unsafe.java:337)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:411)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1021)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
    at java.lang.Thread.run(Thread.java:1019)
  
  "Binder Thread #3" prio=5 tid=10 NATIVE
    | group="main" sCount=1 dsCount=0 obj=0x405be0c0 self=0x3ba1e8
    | sysTid=700 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=3991064
    | schedstat=( 8717000 2885597000 235 )
    at dalvik.system.NativeStart.run(Native Method)
  
  "Thread-16" prio=5 tid=11 NATIVE
    | group="main" sCount=1 dsCount=0 obj=0x40623f98 self=0x3a3600
    | sysTid=332 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=3815224
    | schedstat=( 24507000 2874905000 281 )
    at android.os.MessageQueue.nativePollOnce(Native Method)
    at android.os.MessageQueue.next(MessageQueue.java:119)
    at android.os.Looper.loop(Looper.java:117)
    at au.com.shiftyjelly.pocketcasts.service.k.run(SourceFile:1078)
    at java.lang.Thread.run(Thread.java:1019)
  
  "background thread" prio=5 tid=9 NATIVE
    | group="main" sCount=1 dsCount=0 obj=0x40617c90 self=0x34eb00
    | sysTid=330 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=3468344
    | schedstat=( 8289000 2632928000 198 )
    at android.os.MessageQueue.nativePollOnce(Native Method)
    at android.os.MessageQueue.next(MessageQueue.java:119)
    at android.os.Looper.loop(Looper.java:117)
    at android.os.HandlerThread.run(HandlerThread.java:60)
  
  "pool-1-thread-1" prio=5 tid=8 WAIT
    | group="main" sCount=1 dsCount=0 obj=0x405446b8 self=0x34ace0
    | sysTid=329 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=3451952
    | schedstat=( 39981000 2194522000 271 )
    at java.lang.Object.wait(Native Method)
    - waiting on &lt;0x405447d8&gt; (a java.lang.VMThread)
    at java.lang.Thread.parkFor(Thread.java:1424)
    at java.lang.LangAccessImpl.parkFor(LangAccessImpl.java:48)
    at sun.misc.Unsafe.park(Unsafe.java:337)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:411)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1021)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
    at java.lang.Thread.run(Thread.java:1019)
  
  "Binder Thread #2" prio=5 tid=7 NATIVE
    | group="main" sCount=1 dsCount=0 obj=0x40514c80 self=0x1373b8
    | sysTid=319 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=2641200
    | schedstat=( 13291000 2392775000 260 )
    at dalvik.system.NativeStart.run(Native Method)
  
  "Binder Thread #1" prio=5 tid=6 NATIVE
    | group="main" sCount=1 dsCount=0 obj=0x40514b70 self=0x2849c0
    | sysTid=318 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=603856
    | schedstat=( 12253000 2190249000 264 )
    at dalvik.system.NativeStart.run(Native Method)
  
  "Compiler" daemon prio=5 tid=5 VMWAIT
    | group="system" sCount=1 dsCount=0 obj=0x40510d28 self=0x29f0a0
    | sysTid=317 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=602784
    | schedstat=( 433121000 2151691000 3736 )
    at dalvik.system.NativeStart.run(Native Method)
  
  "Signal Catcher" daemon prio=5 tid=4 RUNNABLE
    | group="system" sCount=0 dsCount=0 obj=0x40510c68 self=0x29ef68
    | sysTid=316 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=602720
    | schedstat=( 8292000 1519782000 208 )
    at dalvik.system.NativeStart.run(Native Method)
  
  "GC" daemon prio=5 tid=3 VMWAIT
    | group="system" sCount=1 dsCount=0 obj=0x40510bc0 self=0x930a0
    | sysTid=315 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=602208
    | schedstat=( 37690000 1428592000 208 )
    at dalvik.system.NativeStart.run(Native Method)
  
  "HeapWorker" daemon prio=5 tid=2 VMWAIT
    | group="system" sCount=1 dsCount=0 obj=0x40510b08 self=0x93510
    | sysTid=314 nice=0 sched=0/0 cgrp=[fopen-error:2] handle=602008
    | schedstat=( 74593000 1863624000 297 )
    at dalvik.system.NativeStart.run(Native Method)
  </code></pre>