execution stop and occur MissingBackpressureException.

stop executing and occur exception in 500~10000 events.

rxjava-1.0.4 rxandroid-0.24.0 using.

Code :

    Observable.interval(1000, TimeUnit.SECONDS)
        .map(count -> {
            return Context.getTime();
        })
        .retry()
        .subscribe(time -> {
            System.out.println(time);
            timeTextView.setText(time);
        });

Error Message :

...
2015-01-14 13:30:01
2015-01-14 13:30:02
2015-01-14 13:30:03
2015-01-14 13:30:04
2015-01-14 13:30:05
rx.exceptions.MissingBackpressureException
        at rx.internal.util.RxRingBuffer.onNext(RxRingBuffer.java:338)
        at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.onNext(OperatorObserveOn.java:115)
        at rx.internal.operators.OperatorSubscribeOn$1$1$1.onNext(OperatorSubscribeOn.java:76)
        at rx.internal.operators.OnSubscribeRedo$2$1.onNext(OnSubscribeRedo.java:231)
        at rx.internal.operators.OperatorMap$1.onNext(OperatorMap.java:55)
        at rx.internal.operators.OnSubscribeTimerPeriodically$1.call(OnSubscribeTimerPeriodically.java:51)
        at rx.Scheduler$Worker$1.call(Scheduler.java:120)
        at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:47)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
        at java.lang.Thread.run(Thread.java:841)

[akarnokd]

There must be something in your code you are not showing that makes this issue. This works for me:

public class IntervalRetry {
    public static void main(String[] args) throws Exception {
        Observable.interval(1, TimeUnit.MICROSECONDS)
        .map(count -> {
            return System.currentTimeMillis();
        })
        .onBackpressureDrop()
        .retry()
        .observeOn(Schedulers.computation())
        .subscribe(time -> {
            System.out.println(time);
        }, Throwable::printStackTrace, System.out::println);
        Thread.sleep(10000);
    }
}

[IlyaEremin]

@akarnokd gotcha, thanks for quick answer. I thought it’s necessary to use it with onBackpressureDrop().