src/main/java/io/reactivex/Maybe.java
@CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Maybe<T> doOnError(Consumer<? super Throwable> onError) {
        return RxJavaPlugins.onAssembly(new MaybePeek<T>(this,
                Functions.emptyConsumer(), // onSubscribe
                Functions.emptyConsumer(), // onSuccess
                ObjectHelper.requireNonNull(onError, "onError is null"),
                Functions.EMPTY_ACTION,    // onComplete
                Functions.EMPTY_ACTION,    // (onSuccess | onError | onComplete)
                Functions.EMPTY_ACTION     // dispose
        ));
    }
@CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Maybe<T> doOnError(Consumer<? super Throwable> onError) {
        return RxJavaPlugins.onAssembly(new MaybePeek<T>(this,
                Functions.emptyConsumer(), // onSubscribe
                Functions.emptyConsumer(), // onSuccess
                ObjectHelper.requireNonNull(onError, "onError is null"),
                Functions.EMPTY_ACTION,    // onComplete
                Functions.EMPTY_ACTION,    // (onSuccess | onError | onComplete)
                Functions.EMPTY_ACTION     // dispose
        ));
    }
@ CheckReturnValue @ NonNull @ SchedulerSupport ( SchedulerSupport . NONE ) public final Maybe < T > doOnError ( Consumer < ? super Throwable > onError ) { return RxJavaPlugins . onAssembly ( new MaybePeek < T > ( this , Functions . emptyConsumer ( ) , // onSubscribe Functions . emptyConsumer ( ) , // onSuccess ObjectHelper . requireNonNull ( onError , "onError is null" ) , Functions . EMPTY_ACTION , // onComplete Functions . EMPTY_ACTION , // (onSuccess | onError | onComplete) Functions . EMPTY_ACTION // dispose ) ) ; }
Calls the shared consumer with the error sent via onError for each
MaybeObserver that subscribes to the current Maybe.
<p>
<img width="640" height="358" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/doOnError.m.png" alt="">
<dl>
<dt><b>Scheduler:</b></dt>
<dd>{@code doOnError} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>
@param onError the consumer called with the success value of onError
@return the new Maybe instance
Calls the shared consumer with the error sent via onError for each MaybeObserver that subscribes to the current Maybe . <p > <img width = 640 height = 358 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / doOnError . m . png alt = > <dl > <dt > <b > Scheduler : < / b > < / dt > <dd > {