Comments (21)
tomrozb
commented on May 19, 2024
I've moved to io.reactivex:rxandroid:0.23.0 and still see this issue. @mttkay have you found something?
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mttkay
commented on May 19, 2024
No. I was able to reproduce it and got stuck by the time Android was
starting to call into native code.
Any suggestions for how to even debug this welcome!
On Nov 21, 2014 4:12 PM, "Tomasz Rozbicki" [email protected] wrote:
I've moved to io.reactivex:rxandroid:0.23.0 and still see this issue.
@mttkay https://github.com/mttkay have you found something?—
Reply to this email directly or view it on GitHub
#21 (comment).
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tomrozb
commented on May 19, 2024
Here's what I've got so far. Sometimes I can find in the crash reports stack trace like below:
16:13:01.654 E Caused by: rx.exceptions.CompositeException$CompositeExceptionCausalChain: Chain of Causes for CompositeException In Order Received =>
16:13:01.654 E at android.util.Log.getStackTraceString(Log.java:410)
16:13:01.654 E at android.util.Slog.e(Slog.java:151)
16:13:01.654 E at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:85)
16:13:01.654 E at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693)
16:13:01.654 E at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)
16:13:01.654 E at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:56)
16:13:01.654 E ... 9 more
16:13:01.654 E Caused by: java.net.ConnectException: failed to connect to /192.168.2.10 (port 8080) after 20000ms: isConnected failed: ECONNREFUSED (Connection refuse
d)
16:13:01.654 E at libcore.io.IoBridge.isConnected(IoBridge.java:223)
16:13:01.654 E at libcore.io.IoBridge.connectErrno(IoBridge.java:161)
16:13:01.654 E at libcore.io.IoBridge.connect(IoBridge.java:112)
...
The most interesting part is: android.util.Log.getStackTraceString(Log.java:410) Looks like this class has been modified by manufacturer, the original one in API21 has only 225 lines, but in fact we don't know if the method implementation is different or not.
Now a simple test, put this code in the onError callback (You can use whatever logging utility you want). The seconds method is from Guava.
UnknownHostException hostException = new UnknownHostException("test");
Timber.e("Log", Log.getStackTraceString(hostException));
Timber.e("Guava", Throwables.getStackTraceAsString(hostException));
And here's the output. Nothing is printed from android.util.Log.getStackTraceString method. I have only Samsung devices, could somebody test this on Nexus with KitKat or at least confirm this on another Samsung device? I've tested it on S4, S5 and Note 3 all with 4.4.2.
16:43:51.151 SomeClass E Log
16:43:51.181 E Guava java.net.UnknownHostException: test
...
16:43:51.181 E at rx.Observable$33.onError(Observable.java:7307)
16:43:51.181 E at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:127)
16:43:51.181 E at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:96)
16:43:51.181 E at rx.internal.operators.NotificationLite.accept(NotificationLite.java:147)
16:43:51.181 E at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.pollQueue(OperatorObserveOn.java:177)
16:43:51.181 E at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.access$000(OperatorObserveOn.java:65)
16:43:51.181 E at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber$2.call(OperatorObserveOn.java:153)
16:43:51.181 E at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:45)
16:43:51.181 E at android.os.Handler.handleCallback(Handler.java:733)
16:43:51.181 E at android.os.Handler.dispatchMessage(Handler.java:95)
16:43:51.181 E at android.os.Looper.loop(Looper.java:136)
16:43:51.181 E at android.app.ActivityThread.main(ActivityThread.java:5586)
16:43:51.181 E at java.lang.reflect.Method.invokeNative(Native Method)
16:43:51.181 E at java.lang.reflect.Method.invoke(Method.java:515)
16:43:51.181 E at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
16:43:51.181 E at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
16:43:51.181 E at dalvik.system.NativeStart.main(Native Method)
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gderaco
commented on May 19, 2024
The reason of the exception (in my case) is this line in SafeSubscriber.java line 174
throw new OnErrorFailedException("Error occurred when trying to propagate error to Observer.onError", new CompositeException(Arrays.asList(e, e2)));
It throws exception because e2 is null.
In my case, the Throwable I pass to onError() method is android.os.NetworkOnMainThreadException
I think a buffer solution would be checking if e2 is null.
I'm using rxandroid 0.23 and Android 5.0.1 x86 emulator. Hope this can help.
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JakeWharton
commented on May 19, 2024
UnknownHostException's trace is never logged, FYI, as you can see in the source of Log.java. Is there still an issue beyond that?
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malachid
commented on May 19, 2024
I was getting a similar error whenever I used RetrofitError.getBody inside RxJava Subscriber.onError. Turns out it was being caused by the getBody call itself throwing an exception. Since initCause, setStackTrace, readObject, and addSuppressed all internally throw exceptions - maybe it's related.
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farmazon3000
commented on May 19, 2024
I think this issue is mentioned here http://stackoverflow.com/questions/24860942/observer-onerror-firing-off-inconsistently.
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tomrozb
commented on May 19, 2024
@farmazon3000 you're right. I'm not sure it still happens in the latest version of Rx, can somebody confirm?
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farmazon3000
commented on May 19, 2024
I'm using
compile 'io.reactivex:rxjava:1.0.12'
compile 'io.reactivex:rxandroid:0.24.0'
and it does happen.
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dlew
commented on May 19, 2024
Those aren't the latest versions of RxJava and RxAndroid. The latest are:
compile 'io.reactivex:rxjava:1.0.14'
compile 'io.reactivex:rxandroid:1.0.1'from rxandroid.
lunf
commented on May 19, 2024
I am on the latest version
E/AndroidRuntime: java.lang.IllegalStateException: Fatal Exception thrown on Scheduler.Worker thread.
E/AndroidRuntime: at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:62)
E/AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:733)
E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime: at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5001)
E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime: Caused by: rx.exceptions.OnErrorFailedException: Error occurred when trying to propagate error to Observer.onError
E/AndroidRuntime: at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:201)
E/AndroidRuntime: at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:111)
E/AndroidRuntime: at rx.observers.SafeSubscriber.onNext(SafeSubscriber.java:137)
E/AndroidRuntime: at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.pollQueue(OperatorObserveOn.java:208)
E/AndroidRuntime: at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber$2.call(OperatorObserveOn.java:170)
E/AndroidRuntime: at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
E/AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:733)
E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime: at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5001)
E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime: Caused by: rx.exceptions.CompositeException: 2 exceptions occurred.
E/AndroidRuntime: at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:201)
E/AndroidRuntime: at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:111)
E/AndroidRuntime: at rx.observers.SafeSubscriber.onNext(SafeSubscriber.java:137)
E/AndroidRuntime: at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.pollQueue(OperatorObserveOn.java:208)
E/AndroidRuntime: at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber$2.call(OperatorObserveOn.java:170)
E/AndroidRuntime: at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
E/AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:733)
E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime: at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5001)
E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime: Caused by: rx.exceptions.CompositeException$CompositeExceptionCausalChain: Chain of Causes for CompositeException In Order Received =>
E/AndroidRuntime: at crittercism.android.bk.a(Unknown Source)
E/AndroidRuntime: at crittercism.android.bk.<init>(Unknown Source)
E/AndroidRuntime: at crittercism.android.az.a(Unknown Source)
E/AndroidRuntime: at crittercism.android.ay.uncaughtException(Unknown Source)```from rxandroid.
dimsuz
commented on May 19, 2024
Looks like it has nothing to do with RxAndroid. Your app's code threw an exception (most likely in your onError handler):
E/AndroidRuntime: at crittercism.android.bk.a(Unknown Source)
E/AndroidRuntime: at crittercism.android.bk.<init>(Unknown Source)
E/AndroidRuntime: at crittercism.android.az.a(Unknown Source)
E/AndroidRuntime: at crittercism.android.ay.uncaughtException(Unknown Source)
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malachid
commented on May 19, 2024
I just got it again (this time because I had a TextInputLayout without a child EditText) - but at least I knew what to look for. It would be nice if my own code showed up in the stack trace somewhere. Without that it turns out to be much harder to track down.
Key though - it's always because your onError is calling something that is throwing an error of some kind (may be runtime, error, etc - not necessarily a compile time exception).
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JakeWharton
commented on May 19, 2024
This issue is old, and has no clear action to take. The most recent comments are normal errors being incorrectly attributed to this issue. As far as I can tell CE is now behaving in an acceptable manner and even if it wasn't this isn't the project which could change it.
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realdadfish
commented on May 19, 2024
We're experiencing this issue also in our code. Clearly, its an application issue where somewhere the onError implementation throws. However, RxJava makes it hard to point out where exactly this happens, because CompositeException swallows onErrors exception iff it shares a cause with the original throwable. Here is the code:
List<Throwable> listOfCauses = getListOfCauses(e);
// check if any of them have been seen before
for(Throwable child : listOfCauses) {
if (seenCauses.contains(child)) {
// already seen this outer Throwable so skip
e = new RuntimeException("Duplicate found in causal chain so cropping to prevent loop ...");
continue;
}
seenCauses.add(child);
}
So, say the chain throws e1 and your code in onError throws e2 while being "somehow" a good citizen and remembers the original e1 as cause. e2 will then completely get evicted / replaced with a new RuntimeException telling us "Duplicate found in causal chain so cropping to prevent loop ...". If you then work with Crashlytics, you will not see anything beside this very runtime exception (even without the exception message, since this is not part of Crashlytics' output for causes for whatever reason). And you will not see anything on logcat, because the exception chain is already way too long.
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JakeWharton
commented on May 19, 2024
Can we create a very small sample (preferably without using anything
Android-specific) that reproduces the problem?
On Mon, May 23, 2016 at 1:23 PM Thomas Keller [email protected]
wrote:
We're experiencing this issue also in our code. Clearly, its an
application issue where somewhere the onError implementation throws.
However, RxJava makes it hard to point out where exactly this happens,
because CompositeException swallows onErrors exception iff it shares a
cause with the original throwable. Here is the code:List<Throwable> listOfCauses = getListOfCauses(e); // check if any of them have been seen before for(Throwable child : listOfCauses) { if (seenCauses.contains(child)) { // already seen this outer Throwable so skip e = new RuntimeException("Duplicate found in causal chain so cropping to prevent loop ..."); continue; } seenCauses.add(child); }So, say the chain throws e1 and your code in onError throws e2 while
being "somehow" a good citizen and remembers the original e1 as cause. e2
will then completely get evicted / replaced with a new RuntimeException
telling us "Duplicate found in causal chain so cropping to prevent loop
...". If you then work with Crashlytics, you will not see anything beside
this very runtime exception (even without the exception message, since this
is not part of Crashlytics' output for causes for whatever reason). And you
will not see anything on logcat, because the exception chain is already way
too long.—
You are receiving this because you modified the open/close state.
Reply to this email directly or view it on GitHub
#21 (comment)
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realdadfish
commented on May 19, 2024
Using rxjava 1.1.1 - given this:
public class Main {
public static void main(String[] args) {
Observable
.error(new IllegalArgumentException("illegal argument"))
.subscribe(
success -> {},
error -> {
throw new IllegalStateException("illegal state exception", error); // Main.java, line 13
}
);
}
}
I see this:
Exception in thread "main" rx.exceptions.OnErrorFailedException: Error occurred when trying to propagate error to Observer.onError
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:192)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
at rx.Observable$ThrowObservable$1.call(Observable.java:10200)
at rx.Observable$ThrowObservable$1.call(Observable.java:10190)
at rx.Observable.subscribe(Observable.java:8407)
at rx.Observable.subscribe(Observable.java:8374)
at rx.Observable.subscribe(Observable.java:8178)
at biz.thomaskeller.rxandroid_21.Main.main(Main.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: rx.exceptions.CompositeException: 2 exceptions occurred.
... 13 more
Caused by: rx.exceptions.CompositeException$CompositeExceptionCausalChain: Chain of Causes for CompositeException In Order Received =>
at rx.exceptions.CompositeException.getCause(CompositeException.java:96)
at java.lang.Throwable.printEnclosedStackTrace(Throwable.java:707)
at java.lang.Throwable.printStackTrace(Throwable.java:667)
at java.lang.Throwable.printStackTrace(Throwable.java:643)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1061)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1052)
at java.lang.Thread.dispatchUncaughtException(Thread.java:1952)
Caused by: java.lang.IllegalArgumentException: illegal argument
at biz.thomaskeller.rxandroid_21.Main.main(Main.java:8)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: java.lang.RuntimeException: Duplicate found in causal chain so cropping to prevent loop ...
at rx.exceptions.CompositeException.getCause(CompositeException.java:112)
at java.lang.Throwable.printEnclosedStackTrace(Throwable.java:707)
at java.lang.Throwable.printStackTrace(Throwable.java:667)
at java.lang.Throwable.printStackTrace(Throwable.java:643)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1061)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1052)
at java.lang.Thread.dispatchUncaughtException(Thread.java:1952)
whereas given this:
public class Main {
public static void main(String[] args) {
Observable
.error(new IllegalArgumentException("illegal argument"))
.subscribe(
success -> {},
error -> {
throw new IllegalStateException("illegal state exception"); // Main.java, line 13
}
);
}
}
I see this:
Exception in thread "main" rx.exceptions.OnErrorFailedException: Error occurred when trying to propagate error to Observer.onError
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:192)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
at rx.Observable$ThrowObservable$1.call(Observable.java:10200)
at rx.Observable$ThrowObservable$1.call(Observable.java:10190)
at rx.Observable.subscribe(Observable.java:8407)
at rx.Observable.subscribe(Observable.java:8374)
at rx.Observable.subscribe(Observable.java:8178)
at biz.thomaskeller.rxandroid_21.Main.main(Main.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: rx.exceptions.CompositeException: 2 exceptions occurred.
... 13 more
Caused by: rx.exceptions.CompositeException$CompositeExceptionCausalChain: Chain of Causes for CompositeException In Order Received =>
at rx.exceptions.CompositeException.getCause(CompositeException.java:96)
at java.lang.Throwable.printEnclosedStackTrace(Throwable.java:707)
at java.lang.Throwable.printStackTrace(Throwable.java:667)
at java.lang.Throwable.printStackTrace(Throwable.java:643)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1061)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1052)
at java.lang.Thread.dispatchUncaughtException(Thread.java:1952)
Caused by: java.lang.IllegalArgumentException: illegal argument
at biz.thomaskeller.rxandroid_21.Main.main(Main.java:8)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: java.lang.IllegalStateException: illegal state exception
at biz.thomaskeller.rxandroid_21.Main.lambda$main$1(Main.java:13)
at biz.thomaskeller.rxandroid_21.Main$$Lambda$2/664223387.call(Unknown Source)
at rx.Observable$28.onError(Observable.java:8187)
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:157)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
at rx.Observable$ThrowObservable$1.call(Observable.java:10200)
at rx.Observable$ThrowObservable$1.call(Observable.java:10190)
at rx.Observable.subscribe(Observable.java:8407)
at rx.Observable.subscribe(Observable.java:8374)
at rx.Observable.subscribe(Observable.java:8178)
at biz.thomaskeller.rxandroid_21.Main.main(Main.java:10)
... 5 more
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realdadfish
commented on May 19, 2024
Hrm... but there seems to be more - because none of my actual crashes point me really at CompositeException.java:112, where the actual cause is replaced with the pseudo cause that crops the chain, still, I always only see the "upstream" exception.
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paramsen
commented on May 19, 2024
As a note, this seems to be fixed in ReactiveX/RxJava#3977 and included in RxJava version 1.1.6.
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AnnKrepchenko
commented on May 19, 2024
compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
compile 'io.reactivex.rxjava2:rxjava:2.0.1'
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dmnsafonov
commented on May 19, 2024
The issue seems to still be there in rxjava 2.1.12, rxandroid 2.1.0.
No cause is left in crashlytics:
io.reactivex.exceptions.CompositeException: at io.reactivex.internal.observers.ConsumerSingleObserver.onError (ConsumerSingleObserver.java:49) at io.reactivex.internal.operators.single.SingleDoOnSubscribe$DoOnSubscribeSingleObserver.onError (SingleDoOnSubscribe.java:86) at io.reactivex.internal.operators.single.SingleObserveOn$ObserveOnSingleObserver.run (SingleObserveOn.java:79) at io.reactivex.android.schedulers.HandlerScheduler$ScheduledRunnable.run (HandlerScheduler.java:119) at android.os.Handler.handleCallback (Handler.java:873) at android.os.Handler.dispatchMessage (Handler.java:99) at android.os.Looper.loop (Looper.java:214) at android.app.ActivityThread.main (ActivityThread.java:7073) at java.lang.reflect.Method.invoke (Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:965)
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