src/main/java/io/reactivex/Observable.java
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Observable<T> retry(long times, Predicate<? super Throwable> predicate) {
        if (times < 0) {
            throw new IllegalArgumentException("times >= 0 required but it was " + times);
        }
        ObjectHelper.requireNonNull(predicate, "predicate is null");

        return RxJavaPlugins.onAssembly(new ObservableRetryPredicate<T>(this, times, predicate));
    }
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Observable<T> retry(long times, Predicate<? super Throwable> predicate) {
        if (times < 0) {
            throw new IllegalArgumentException("times >= 0 required but it was " + times);
        }
        ObjectHelper.requireNonNull(predicate, "predicate is null");

        return RxJavaPlugins.onAssembly(new ObservableRetryPredicate<T>(this, times, predicate));
    }
@ CheckReturnValue @ SchedulerSupport ( SchedulerSupport . NONE ) public final Observable < T > retry ( long times , Predicate < ? super Throwable > predicate ) { if ( times < 0 ) { throw new IllegalArgumentException ( "times >= 0 required but it was " + times ) ; } ObjectHelper . requireNonNull ( predicate , "predicate is null" ) ; return RxJavaPlugins . onAssembly ( new ObservableRetryPredicate < T > ( this , times , predicate ) ) ; }
Retries at most times or until the predicate returns false, whichever happens first.
<p>
<img width="640" height="269" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/retry.o.nfe.png" alt="">
<dl>
<dt><b>Scheduler:</b></dt>
<dd>{@code retry} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>
@param times the number of times to resubscribe if the current Observable fails
@param predicate the predicate called with the failure Throwable and should return true to trigger a retry.
@return the new Observable instance
Retries at most times or until the predicate returns false whichever happens first . <p > <img width = 640 height = 269 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / retry . o . nfe . png alt = > <dl > <dt > <b > Scheduler : < / b > < / dt > <dd > {