Fatal Exception: io.reactivex.exceptions.UndeliverableException: java.io.IOException: Operation not permitted #63

IonutNegru87 · 2017-09-10T18:32:33Z

Recently I started receiving the following crash:

Fatal Exception: io.reactivex.exceptions.UndeliverableException: java.io.IOException: Operation not permitted
       at io.reactivex.plugins.RxJavaPlugins.onError(RxJavaPlugins.java:349)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.innerError(FlowableFlatMap.java:604)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$InnerSubscriber.onError(FlowableFlatMap.java:665)
       at io.reactivex.internal.operators.flowable.FlowableRetryPredicate$RepeatSubscriber.onError(FlowableRetryPredicate.java:81)
       at io.reactivex.internal.operators.flowable.FlowableDoOnEach$DoOnEachSubscriber.onError(FlowableDoOnEach.java:110)
       at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.onError(FlowableSubscribeOn.java:102)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BaseEmitter.onError(FlowableCreate.java:268)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BufferAsyncEmitter.drain(FlowableCreate.java:510)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BufferAsyncEmitter.onError(FlowableCreate.java:461)
       at com.instacart.library.truetime.TrueTimeRx$4$1$2.subscribe(TrueTimeRx.java:201)
       at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:72)
       at io.reactivex.Flowable.subscribe(Flowable.java:12986)
       at io.reactivex.Flowable.subscribe(Flowable.java:12932)
       at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
       at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:61)
       at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:52)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
       at java.lang.Thread.run(Thread.java:761)
Caused by java.io.IOException: Operation not permitted
       at java.net.PlainDatagramSocketImpl.send(PlainDatagramSocketImpl.java)
       at java.net.DatagramSocket.send(DatagramSocket.java:691)
       at com.instacart.library.truetime.SntpClient.requestTime(SntpClient.java:114)
       at com.instacart.library.truetime.TrueTime.requestTime(TrueTime.java:122)
       at com.instacart.library.truetime.TrueTimeRx$4$1$2.subscribe(TrueTimeRx.java:197)
       at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:72)
       at io.reactivex.Flowable.subscribe(Flowable.java:12986)
       at io.reactivex.Flowable.subscribe(Flowable.java:12932)
       at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
       at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:61)
       at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:52)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
       at java.lang.Thread.run(Thread.java:761)

I've recently updated the initialization to TrueTimeRx. Before this, I haven't received any crashes.
Can you help me solve this?

This is my initialization:

private void initTime() {
    TrueTimeRx.build()
              .initializeRx("time.google.com")
              .subscribeOn(Schedulers.io())
              .subscribe(date -> Timber.v("initTime(): TrueTime was initialized and we have a time: " + date),
                  Throwable::printStackTrace);
  }

Method which I call in onCreate() method of my project Application class.

The text was updated successfully, but these errors were encountered:

IonutNegru87 · 2017-09-10T19:40:22Z

Also, I was wondering if Completable isn't a better choice for the initialization process?

kaushikgopal · 2017-10-05T20:18:36Z

you sure this is not a permissions issue? Operation not permitted generally points towards that. but not sure if it's some weird network/ssl issue. are you consistently seeing this crash? i.e. is it reproducible. if not, difficult to tell what the problem is, without more info.

wrt Completable (the init method also needs to emit the result, which is why i chose a regular Observable. Completable doesn't emit an onNext result. (also please open a different issue for this, if you want follow up questions)

✌️

AndrewBedscastle · 2017-10-16T20:55:09Z

Same here:
Initilization

                        .withSharedPreferences(context)
                        .initializeRx("time.apple.com")
                        .subscribeOn(Schedulers.io())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(
                                date ->
                                {
                                    MyLogger.i(TAG, "True time date is available");

                                    // .... subscriber code
                                       ...
                                      ...

                                    successfullyReceivedDate = true;                                   

                                },
                                throwable ->
                                        MyLogger.e(TAG, "Error while trying to get NTP time", throwable));

I call it in onCreate() of my application class

The Google Play Console is full of crashes like this

io.reactivex.exceptions.UndeliverableException: 
  at io.reactivex.plugins.RxJavaPlugins.onError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.innerError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableFlatMap$InnerSubscriber.onError (Unknown Source)
  at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableToList$ToListSubscriber.onError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.checkTerminate (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drainLoop (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drain (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.innerError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableFlatMap$InnerSubscriber.onError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableRetryPredicate$RepeatSubscriber.onError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableDoOnEach$DoOnEachSubscriber.onError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.onError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableCreate$BaseEmitter.error (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableCreate$BufferAsyncEmitter.drain (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableCreate$BufferAsyncEmitter.tryOnError (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableCreate$BaseEmitter.onError (Unknown Source)
  at com.instacart.library.truetime.TrueTimeRx$4$1$2.subscribe (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual (Unknown Source)
  at io.reactivex.Flowable.subscribe (Unknown Source)
  at io.reactivex.Flowable.subscribe (Unknown Source)
  at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run (Unknown Source)
  at io.reactivex.internal.schedulers.ScheduledRunnable.run (Unknown Source)
  at io.reactivex.internal.schedulers.ScheduledRunnable.call (Unknown Source)
  at java.util.concurrent.FutureTask.run (FutureTask.java:237)
  at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run (ScheduledThreadPoolExecutor.java:272)
  at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1133)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:607)
  at java.lang.Thread.run (Thread.java:762)
Caused by: java.io.IOException: 
  at java.net.PlainDatagramSocketImpl.send (Native Method)
  at java.net.DatagramSocket.send (DatagramSocket.java:694)
  at com.instacart.library.truetime.SntpClient.requestTime (Unknown Source)
  at com.instacart.library.truetime.TrueTime.requestTime (Unknown Source)

I did not get any error reports from my users that the app is really crashing, but this is really really strange...
Do you know why this happens?
How can it be avoided?

Would that help?
ReactiveX/RxJava#4863

AndrewBedscastle · 2017-10-17T11:13:21Z

I think you should really use this one:
http://reactivex.io/RxJava/2.x/javadoc/io/reactivex/FlowableEmitter.html#tryOnError-java.lang.Throwable-
More details:
ReactiveX/RxJava#4880

TonyTangAndroid · 2017-10-31T15:39:59Z

I am also running into this issue. And it has a lot of reports from Crashlytics. But somehow I could not manage to reproduce it on my own device.

lemberh · 2017-12-13T17:16:13Z

Same problem in my App.
The problem is that despite I have onError callback everywhere where I subscribe to the app the app is crashing,
Seems the reason is in the producer (Flowable) implementation
This stackoverflow answer describes this issue https://stackoverflow.com/a/43525858/1307690
Looks like I had already disposed my subscription but SMTP client is still waiting for response and then crashes, but at that time there is nobody to handle this exception as I already had disposed my subscription.

Fatal Exception: io.reactivex.exceptions.UndeliverableException: java.io.IOException: Operation not permitted
       at io.reactivex.plugins.RxJavaPlugins.onError(RxJavaPlugins.java:349)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.innerError(FlowableFlatMap.java:604)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$InnerSubscriber.onError(FlowableFlatMap.java:665)
       at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
       at io.reactivex.internal.operators.flowable.FlowableToList$ToListSubscriber.onError(FlowableToList.java:81)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.checkTerminate(FlowableFlatMap.java:563)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drainLoop(FlowableFlatMap.java:374)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.drain(FlowableFlatMap.java:366)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.innerError(FlowableFlatMap.java:602)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$InnerSubscriber.onError(FlowableFlatMap.java:665)
       at io.reactivex.internal.operators.flowable.FlowableRetryPredicate$RepeatSubscriber.onError(FlowableRetryPredicate.java:81)
       at io.reactivex.internal.operators.flowable.FlowableDoOnEach$DoOnEachSubscriber.onError(FlowableDoOnEach.java:111)
       at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.onError(FlowableSubscribeOn.java:102)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BaseEmitter.error(FlowableCreate.java:288)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BufferAsyncEmitter.drain(FlowableCreate.java:531)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BufferAsyncEmitter.tryOnError(FlowableCreate.java:481)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BaseEmitter.onError(FlowableCreate.java:270)
       at com.instacart.library.truetime.TrueTimeRx$4$1$2.subscribe(TrueTimeRx.java:209)
       at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:72)
       at io.reactivex.Flowable.subscribe(Flowable.java:12995)
       at io.reactivex.Flowable.subscribe(Flowable.java:12941)
       at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
       at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:61)
       at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:52)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
       at java.lang.Thread.run(Thread.java:761)
Caused by java.io.IOException: Operation not permitted
       at java.net.PlainDatagramSocketImpl.send(PlainDatagramSocketImpl.java)
       at java.net.DatagramSocket.send(DatagramSocket.java:696)
       at com.instacart.library.truetime.SntpClient.requestTime(SntpClient.java:116)
       at com.instacart.library.truetime.TrueTime.requestTime(TrueTime.java:122)
       at com.instacart.library.truetime.TrueTimeRx$4$1$2.subscribe(TrueTimeRx.java:205)
       at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:72)
       at io.reactivex.Flowable.subscribe(Flowable.java:12995)
       at io.reactivex.Flowable.subscribe(Flowable.java:12941)
       at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
       at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:61)
       at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:52)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
       at java.lang.Thread.run(Thread.java:761)

guillerial · 2018-02-23T12:43:44Z

Hello, has anyone found a solution to this issue?

Same problem here:

Fatal Exception: io.reactivex.exceptions.UndeliverableException: java.io.IOException: sendto failed: EPERM (Operation not permitted)
       at io.reactivex.plugins.RxJavaPlugins.onError(RxJavaPlugins.java:349)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$MergeSubscriber.innerError(FlowableFlatMap.java:604)
       at io.reactivex.internal.operators.flowable.FlowableFlatMap$InnerSubscriber.onError(FlowableFlatMap.java:665)
       at io.reactivex.internal.operators.flowable.FlowableRetryPredicate$RepeatSubscriber.onError(FlowableRetryPredicate.java:81)
       at io.reactivex.internal.operators.flowable.FlowableDoOnEach$DoOnEachSubscriber.onError(FlowableDoOnEach.java:110)
       at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.onError(FlowableSubscribeOn.java:102)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BaseEmitter.onError(FlowableCreate.java:268)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BufferAsyncEmitter.drain(FlowableCreate.java:510)
       at io.reactivex.internal.operators.flowable.FlowableCreate$BufferAsyncEmitter.onError(FlowableCreate.java:461)
       at com.instacart.library.truetime.TrueTimeRx$4$1$2.subscribe(TrueTimeRx.java:201)
       at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:72)
       at io.reactivex.Flowable.subscribe(Flowable.java:12986)
       at io.reactivex.Flowable.subscribe(Flowable.java:12932)
       at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
       at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:61)
       at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:52)
       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
       at java.lang.Thread.run(Thread.java:764)
Caused by java.io.IOException: sendto failed: EPERM (Operation not permitted)
       at libcore.io.IoBridge.maybeThrowAfterSendto(IoBridge.java:603)
       at libcore.io.IoBridge.sendto(IoBridge.java:571)
       at java.net.PlainDatagramSocketImpl.send(PlainDatagramSocketImpl.java:124)
       at java.net.DatagramSocket.send(DatagramSocket.java:721)
       at com.instacart.library.truetime.SntpClient.requestTime(SntpClient.java:114)
       at com.instacart.library.truetime.TrueTime.requestTime(TrueTime.java:122)
       at com.instacart.library.truetime.TrueTimeRx$4$1$2.subscribe(TrueTimeRx.java:197)
       at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:72)
       at io.reactivex.Flowable.subscribe(Flowable.java:12986)
       at io.reactivex.Flowable.subscribe(Flowable.java:12932)
       at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
       at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:61)
       at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:52)
       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
       at java.lang.Thread.run(Thread.java:764)

kaushikgopal · 2018-05-29T00:37:06Z

dang @AndrewBedscastle ! that's a good catch.

🤔 i'm really tempted to use the new RxJava tryOnError api. The big caveat is it's currently marked experimental. for more context:

2.x: CreateEmitter throws when onError called after dispose unlike 1.x ReactiveX/RxJava#4880 - describes a similar issue we're facing
2.x: add tryOnError to create/XEmitter API ReactiveX/RxJava#5344 - PR with the change
https://github.com/ReactiveX/RxJava/blob/2.x/CHANGES.md - 2.1.14 changelog with the new api mentioned.

🤔 after thinking about this a little more, my current thinking:

Having seen how the api changes progress with Rx, i'm inclined to actually start using this. If for some reason, this api is removed or modified, we can go back to manually checking if emitter.isDisposed and throwing error in that circumstance. Granted, that would then open us up to the potential race condition mentioned in the first link. But that's a bridge I feel we can cross, when we get there.

stay tuned for a PR that should help with this

kaushikgopal · 2018-05-29T00:41:33Z

jk, there's already a PR #70 that @AndrewBedscastle has up

kaushikgopal · 2018-05-29T00:58:29Z

master should have the required fixes now. If you're eager to take this before it hits 3.4 try:

implementation com.github.instacart.truetime-android:library-extension-rx:09087b6a6e

yarkh · 2018-09-04T10:45:44Z

@kaushikgopal when will 3.4 be released? Will this fix be included?
I get bunch of errors for my production build from Google Play crashes:

java.io.IOException
in com.instacart.library.truetime.SntpClient.requestTime

android.system.ErrnoException
in com.instacart.library.truetime.SntpClient.requestTime

io.reactivex.exceptions.CompositeException
in com.instacart.library.truetime.TrueTimeRx$4$1$2.subscribe

com.instacart.library.truetime.InvalidNtpServerResponseException
in com.instacart.library.truetime.SntpClient.requestTime

android.system.ErrnoException
in com.instacart.library.truetime.SntpClient.requestTime

kaushikgopal · 2018-09-05T21:57:19Z

@yarkh 3.4 is released!

anandwana001 · 2018-11-27T10:42:01Z

I am getting error in my production app

Fatal Exception: io.reactivex.exceptions.UndeliverableException
java.io.IOException: Operation not permitted

Dependency

implementation 'com.github.instacart.truetime-android:library-extension-rx:3.4'

Implementation

val disposable = TrueTimeRx.build()
                .withConnectionTimeout(31428)
                .withLoggingEnabled(true)
                .initializeRx("17.253.84.251")
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeWith(object : DisposableSingleObserver<Date>() {
                    override fun onSuccess(date: Date) {
                        Log.d("TrueTimeTag", "Success initialized TrueTime :" + date.toString())
                    }

                    override fun onError(e: Throwable) {
                        Log.e("TrueTimeTag", "something went wrong when trying to initializeRx TrueTime", e)
                    }
                })

used a specific ip address as time.google.com and time.apple.com not even giving the response, big delay.

Help me here.

apexkid · 2020-05-21T07:55:23Z

I am seeing the same error on crashlytics for around 20% of my users. I am using 3.4 version. How to fix this? This is a major issue which should be addressed. Else it will make the library unusable for me.

AndrewBedscastle mentioned this issue Oct 17, 2017

Use the new tryOnError method to avoid UndeliverableException if the … #70

Merged

kaushikgopal added the wip A current PR or fix will address this in the future label May 29, 2018

kaushikgopal added awaiting feedback Awaiting feedback before resolving/closing and removed wip A current PR or fix will address this in the future labels May 29, 2018

kaushikgopal mentioned this issue May 29, 2018

java.net.SocketException: sendto failed: ENETUNREACH (Network is unreachable) #69

Closed

kaushikgopal closed this as completed Sep 5, 2018

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Fatal Exception: io.reactivex.exceptions.UndeliverableException: java.io.IOException: Operation not permitted #63

Fatal Exception: io.reactivex.exceptions.UndeliverableException: java.io.IOException: Operation not permitted #63

IonutNegru87 commented Sep 10, 2017 •

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kaushikgopal commented Oct 5, 2017

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anandwana001 commented Nov 27, 2018

apexkid commented May 21, 2020

Fatal Exception: io.reactivex.exceptions.UndeliverableException: java.io.IOException: Operation not permitted #63

Fatal Exception: io.reactivex.exceptions.UndeliverableException: java.io.IOException: Operation not permitted #63

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