Report ANRs

When mobile apps become non-responsive and cannot respond to user input, Android devices display an Application Not Responding dialog box, or ANR, which forcefully terminates the non-responding app. The timeout is enforced by the system. You can view a report of ANRs when they occur in your mobile app. This monitoring feature helps you to identify common problem of ANR, such as application deadlocks and unexpectedly long-running or stalled HTTP requests.

Enable ANR reporting using the following startANRMonitoring(timeout, ignoreDebugger) method. For example:

Mint.startANRMonitoring(5000, true);

Then, when an ANR occurs, a normal handled exception is created containing an ANR parameter set to "true" in extraData. To find these occurrences, run a search in Splunk Web. For example:

sourcetype="mint:error" "extraData.ANR"=true

Inspect the stacktrace.0 field in the search results. This field contains a list of app threads and the corresponding stacks at the time the ANR occurred. Note that the "Caused by" line is used as a delimiter, and does not indicate the cause of the precedent exception.

Here is an example result:

 { [-]
   apiKey: fbcc7783
   appEnvironment: Release
   appVersionCode: 1
   appVersionName: 1.0
   batteryLevel: 17
   breadcrumbs: [
   ]
   carrier: Android
   connection: NA
   currentView: NA
   device: Genymotion Google Nexus 6 - 6.0.0 - API 23 - 1440x2560
   errorHash: 46b69b11185d8288c0b2737d47ec9414
   extraData: { [-]
     ANR: true
   }
   gpsStatus: NA
   handled: true
   klass: java.lang.Exception
   locale: US
   log: NA
   memAppAvailable: 0.21
   memAppMax: 96
   memAppTotal: 2.23
   memSysLow: false
   memSysThreshold: 0
   message: java.lang.Exception: com.github.anrwatchdog.ANRError: Application Not Responding
   msFromStart: 6006
   osVersion: 6.0
   packageName: com.splunk.mint.test.testanr
   platform: Android
   remoteIP: 204.107.141.240
   rooted: true
   screenOrientation: Portrait
   sdkVersion: 5.1.0
   session_id: 12443316-1d22-4428-a4f0-d4084440fe07
   stacktrace: { [-]
     0: java.lang.Exception: com.github.anrwatchdog.ANRError: Application Not Responding
	at com.splunk.mint.Mint$3.onAppNotResponding(Unknown Source)
	at com.github.anrwatchdog.ANRWatchDog.run(Unknown Source)
Caused by: com.github.anrwatchdog.ANRError: Application Not Responding
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: main
	at java.lang.Thread.sleep(Native Method)
	at java.lang.Thread.sleep(Thread.java:1031)
	at java.lang.Thread.sleep(Thread.java:985)
	at android.os.SystemClock.sleep(SystemClock.java:120)
	at com.splunk.mint.test.testanr.MainActivity.StopResponding(MainActivity.java:23)
	at java.lang.reflect.Method.invoke(Native Method)
	at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
	at android.view.View.performClick(View.java:5198)
	at com.splunk.mint.test.testanr.ApplicationTest.testANR(ApplicationTest.java:43)
	at java.lang.reflect.Method.invoke(Native Method)
	at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214)
	at android.test.InstrumentationTestCase.-wrap0(InstrumentationTestCase.java)
	at android.test.InstrumentationTestCase$2.run(InstrumentationTestCase.java:189)
	at android.app.Instrumentation$SyncRunnable.run(Instrumentation.java:1897)
	at android.os.Handler.handleCallback(Handler.java:739)
	at android.os.Handler.dispatchMessage(Handler.java:95)
	at android.os.Looper.loop(Looper.java:148)
	at android.app.ActivityThread.main(ActivityThread.java:5417)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: FinalizerDaemon
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:423)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:101)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:72)
	at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:185)
	at java.lang.Thread.run(Thread.java:818)
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: FinalizerWatchdogDaemon
	at java.lang.Thread.sleep(Native Method)
	at java.lang.Thread.sleep(Thread.java:1031)
	at java.lang.Thread.sleep(Thread.java:985)
	at java.lang.Daemons$FinalizerWatchdogDaemon.sleepFor(Daemons.java:273)
	at java.lang.Daemons$FinalizerWatchdogDaemon.waitForFinalization(Daemons.java:284)
	at java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:232)
	... 1 more
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: HeapTaskDaemon
	at dalvik.system.VMRuntime.runHeapTasks(Native Method)
	at java.lang.Daemons$HeapTaskDaemon.run(Daemons.java:355)
	... 1 more
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: Instr: android.support.test.runner.AndroidJUnitRunner
	at java.lang.Object.wait(Native Method)
	at android.app.Instrumentation$SyncRunnable.waitForComplete(Instrumentation.java:1908)
	at android.app.Instrumentation.runOnMainSync(Instrumentation.java:353)
	at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:186)
	at android.test.ActivityInstrumentationTestCase2.runTest(ActivityInstrumentationTestCase2.java:192)
	at junit.framework.TestCase.runBare(TestCase.java:134)
	at junit.framework.TestResult$1.protect(TestResult.java:115)
	at android.support.test.internal.runner.junit3.AndroidTestResult.runProtected(AndroidTestResult.java:77)
	at junit.framework.TestResult.run(TestResult.java:118)
	at android.support.test.internal.runner.junit3.AndroidTestResult.run(AndroidTestResult.java:55)
	at junit.framework.TestCase.run(TestCase.java:124)
	at android.support.test.internal.runner.junit3.NonLeakyTestSuite$NonLeakyTest.run(NonLeakyTestSuite.java:63)
	at junit.framework.TestSuite.runTest(TestSuite.java:243)
	at junit.framework.TestSuite.run(TestSuite.java:238)
	at android.support.test.internal.runner.junit3.DelegatingTestSuite.run(DelegatingTestSuite.java:103)
	at android.support.test.internal.runner.junit3.AndroidTestSuite.run(AndroidTestSuite.java:69)
	at android.support.test.internal.runner.junit3.JUnit38ClassRunner.run(JUnit38ClassRunner.java:90)
	at org.junit.runners.Suite.runChild(Suite.java:128)
	at org.junit.runners.Suite.runChild(Suite.java:27)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
	at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:54)
	at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:240)
	at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1879)
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: OkHttp ConnectionPool
	at java.lang.Object.wait(Native Method)
	at com.android.okhttp.ConnectionPool.performCleanup(ConnectionPool.java:305)
	at com.android.okhttp.ConnectionPool.runCleanupUntilPoolIsEmpty(ConnectionPool.java:242)
	at com.android.okhttp.ConnectionPool.-wrap0(ConnectionPool.java)
	at com.android.okhttp.ConnectionPool$1.run(ConnectionPool.java:97)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
	at java.lang.Thread.run(Thread.java:818)
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: Okio Watchdog
	at java.lang.Object.wait(Native Method)
	at com.android.okhttp.okio.AsyncTimeout.awaitTimeout(AsyncTimeout.java:323)
	at com.android.okhttp.okio.AsyncTimeout.-wrap0(AsyncTimeout.java)
	at com.android.okhttp.okio.AsyncTimeout$Watchdog.run(AsyncTimeout.java:286)
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: ReferenceQueueDaemon
	at java.lang.Object.wait(Native Method)
	at java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:147)
	at java.lang.Thread.run(Thread.java:818)
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: Thread-154
	at java.lang.Object.wait(Native Method)
	at java.lang.Thread.parkFor$(Thread.java:1220)
	at sun.misc.Unsafe.park(Unsafe.java:299)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2013)
	at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410)
	at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1038)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1098)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
	... 1 more
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: Thread-158
	... 10 more
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: Thread-159
	... 10 more
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: pool-2-thread-1
	... 10 more
Caused by: com.github.anrwatchdog.ANRError$$$_Thread: |ANR-WatchDog|
	at dalvik.system.VMStack.getThreadStackTrace(Native Method)
	at java.lang.Thread.getStackTrace(Thread.java:580)
	at java.lang.Thread.getAllStackTraces(Thread.java:522)
	at com.github.anrwatchdog.ANRError.New(Unknown Source)
	at com.github.anrwatchdog.ANRWatchDog.run(Unknown Source)
   }
   state: NA
   threadCrashed: 0
   transactions: [
   ]
   userIdentifier: NA
   uuid: fake_uid
   where: Unknown Source
}