src/main/java/io/reactivex/Flowable.java
@CheckReturnValue
    @NonNull
    @BackpressureSupport(BackpressureKind.FULL)
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Flowable<T> onErrorResumeNext(Function<? super Throwable, ? extends Publisher<? extends T>> resumeFunction) {
        ObjectHelper.requireNonNull(resumeFunction, "resumeFunction is null");
        return RxJavaPlugins.onAssembly(new FlowableOnErrorNext<T>(this, resumeFunction, false));
    }
@CheckReturnValue
    @NonNull
    @BackpressureSupport(BackpressureKind.FULL)
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Flowable<T> onErrorResumeNext(Function<? super Throwable, ? extends Publisher<? extends T>> resumeFunction) {
        ObjectHelper.requireNonNull(resumeFunction, "resumeFunction is null");
        return RxJavaPlugins.onAssembly(new FlowableOnErrorNext<T>(this, resumeFunction, false));
    }
@ CheckReturnValue @ NonNull @ BackpressureSupport ( BackpressureKind . FULL ) @ SchedulerSupport ( SchedulerSupport . NONE ) public final Flowable < T > onErrorResumeNext ( Function < ? super Throwable , ? extends Publisher < ? extends T > > resumeFunction ) { ObjectHelper . requireNonNull ( resumeFunction , "resumeFunction is null" ) ; return RxJavaPlugins . onAssembly ( new FlowableOnErrorNext < T > ( this , resumeFunction , false ) ) ; }
Instructs a Publisher to pass control to another Publisher rather than invoking
{@link Subscriber#onError onError} if it encounters an error.
<p>
<img width="640" height="310" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/onErrorResumeNext.png" alt="">
<p>
By default, when a Publisher encounters an error that prevents it from emitting the expected item to
its {@link Subscriber}, the Publisher invokes its Subscriber's {@code onError} method, and then quits
without invoking any more of its Subscriber's methods. The {@code onErrorResumeNext} method changes this
behavior. If you pass a function that returns a Publisher ({@code resumeFunction}) to
{@code onErrorResumeNext}, if the original Publisher encounters an error, instead of invoking its
Subscriber's {@code onError} method, it will instead relinquish control to the Publisher returned from
{@code resumeFunction}, which will invoke the Subscriber's {@link Subscriber#onNext onNext} method if it is
able to do so. In such a case, because no Publisher necessarily invokes {@code onError}, the Subscriber
may never know that an error happened.
<p>
You can use this to prevent errors from propagating or to supply fallback data should errors be
encountered.
<dl>
<dt><b>Backpressure:</b></dt>
<dd>The operator honors backpressure from downstream. This and the resuming {@code Publisher}s
are expected to honor backpressure as well.
If any of them violate this expectation, the operator <em>may</em> throw an
{@code IllegalStateException} when the source {@code Publisher} completes or
a {@code MissingBackpressureException} is signaled somewhere downstream.</dd>
<dt><b>Scheduler:</b></dt>
<dd>{@code onErrorResumeNext} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@param resumeFunction
a function that returns a Publisher that will take over if the source Publisher encounters
an error
@return the original Publisher, with appropriately modified behavior
@see <a href="http://reactivex.io/documentation/operators/catch.html">ReactiveX operators documentation: Catch</a>
Instructs a Publisher to pass control to another Publisher rather than invoking { @link Subscriber#onError onError } if it encounters an error . <p > <img width = 640 height = 310 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / onErrorResumeNext . png alt = > <p > By default when a Publisher encounters an error that prevents it from emitting the expected item to its { @link Subscriber } the Publisher invokes its Subscriber s { @code onError } method and then quits without invoking any more of its Subscriber s methods . The { @code onErrorResumeNext } method changes this behavior . If you pass a function that returns a Publisher ( { @code resumeFunction } ) to { @code onErrorResumeNext } if the original Publisher encounters an error instead of invoking its Subscriber s { @code onError } method it will instead relinquish control to the Publisher returned from { @code resumeFunction } which will invoke the Subscriber s { @link Subscriber#onNext onNext } method if it is able to do so . In such a case because no Publisher necessarily invokes { @code onError } the Subscriber may never know that an error happened . <p > You can use this to prevent errors from propagating or to supply fallback data should errors be encountered . <dl > <dt > <b > Backpressure : < / b > < / dt > <dd > The operator honors backpressure from downstream . This and the resuming { @code Publisher } s are expected to honor backpressure as well . If any of them violate this expectation the operator <em > may< / em > throw an { @code IllegalStateException } when the source { @code Publisher } completes or a { @code MissingBackpressureException } is signaled somewhere downstream . < / dd > <dt > <b > Scheduler : < / b > < / dt > <dd > { @code onErrorResumeNext } does not operate by default on a particular { @link Scheduler } . < / dd > < / dl >