IllegalStateException onError about rxandroid HOT 16 CLOSED

 public final Subscription subscribe(final Action1<? super T> onNext, final Action1<Throwable> onError) {
        if (onNext == null) {
            throw new IllegalArgumentException("onNext can not be null");
        }
        if (onError == null) {
            throw new IllegalArgumentException("onError can not be null");
        }

        return subscribe(new Subscriber<T>() {

            @Override
            public final void onCompleted() {
                // do nothing
            }

            @Override
            public final void onError(Throwable e) {
                onError.call(e);
            }

            @Override
            public final void onNext(T args) {
                onNext.call(args);
            }

        });
    }

 private class APIErrorHandler implements ErrorHandler {
        @Override
        public Throwable handleError(RetrofitError cause) {
            if (cause.getKind() == Kind.NETWORK) {
                if (cause.getCause() instanceof SocketTimeoutException) {
                    return new ConnectionTimeoutException();
                } else {
                    return new NoConnectionException();
                }
       }
}

E/AndroidRuntime(22087): Process: com.oxa7.shou, PID: 22087
E/AndroidRuntime(22087): java.lang.IllegalStateException: Exception thrown on Scheduler.Worker thread. Add `onError` handling.
E/AndroidRuntime(22087):    at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:52)
E/AndroidRuntime(22087):    at android.os.Handler.handleCallback(Handler.java:739)
E/AndroidRuntime(22087):    at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime(22087):    at android.os.Looper.loop(Looper.java:135)
E/AndroidRuntime(22087):    at android.app.ActivityThread.main(ActivityThread.java:5221)
E/AndroidRuntime(22087):    at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(22087):    at java.lang.reflect.Method.invoke(Method.java:372)
E/AndroidRuntime(22087):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
E/AndroidRuntime(22087):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
E/AndroidRuntime(22087): Caused by: rx.exceptions.OnErrorNotImplementedException
E/AndroidRuntime(22087):    at rx.Observable$31.onError(Observable.java:7069)
E/AndroidRuntime(22087):    at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:154)
E/AndroidRuntime(22087):    at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:111)
E/AndroidRuntime(22087):    at rx.android.operators.OperatorConditionalBinding$1.onError(OperatorConditionalBinding.java:66)
E/AndroidRuntime(22087):    at rx.internal.operators.NotificationLite.accept(NotificationLite.java:147)
E/AndroidRuntime(22087):    at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.pollQueue(OperatorObserveOn.java:177)
E/AndroidRuntime(22087):    at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.access$000(OperatorObserveOn.java:65)
E/AndroidRuntime(22087):    at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber$2.call(OperatorObserveOn.java:153)
E/AndroidRuntime(22087):    at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:47)
E/AndroidRuntime(22087):    ... 8 more
E/AndroidRuntime(22087): Caused by: xxxx.api.BaseAPI$NoConnectionException
E/AndroidRuntime(22087):    at xxx.api.BaseAPI$APIErrorHandler.handleError(BaseAPI.java:86)
E/AndroidRuntime(22087):    at retrofit.RxSupport$2.run(RxSupport.java:59)
E/AndroidRuntime(22087):    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
E/AndroidRuntime(22087):    at java.util.concurrent.FutureTask.run(FutureTask.java:237)
E/AndroidRuntime(22087):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
E/AndroidRuntime(22087):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
E/AndroidRuntime(22087):    at retrofit.Platform$Android$2$1.run(Platform.java:142)
E/AndroidRuntime(22087):    at java.lang.Thread.run(Thread.java:818)

        mSubscription = AndroidObservable.bindActivity(Activity.this, xxxAPI.show(id))
                .subscribe(new Action1<XX>() {
                    @Override
                    public void call(User user) {
                     }
                }, new Action1<Throwable>() {
                    @Override
                    public void call(Throwable err) {
                        Log....
                    }
                });

  RestAdapter.Builder builder = new RestAdapter.Builder().setEndpoint(API_ROOT)
                .setErrorHandler(new  APIErrorHandler()).setRequestInterceptor(mRequestInterceptor).setClient(new OkClient(ok));

       the_observable.subscribeOn(Schedulers.newThread())
                .observeOn(AndroidSchedulers.mainThread())
                .map(mPojo -> " abc: " + mPojo.whatever())
                .subscribe(current -> {
                    Log.e("Output is", current.toString());
                }, throwable -> Log.e("Error", throwable.getMessage()));

    compile 'io.reactivex:rxandroid:1.0.1'
    compile 'io.reactivex:rxjava:1.0.16'
    compile 'com.squareup.retrofit:retrofit:2.0.0-beta2'
    compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2'
    compile 'com.squareup.retrofit:adapter-rxjava:2.0.0-beta2'