HTTP 503服务暂时不可用

retrofit2.adapter.rxjava.HttpException: HTTP 503 Service Temporarily Unavailable
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at retrofit2.adapter.rxjava.OperatorMapResponseToBodyOrError$1.onNext(OperatorMapResponseToBodyOrError.java:43)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at retrofit2.adapter.rxjava.OperatorMapResponseToBodyOrError$1.onNext(OperatorMapResponseToBodyOrError.java:38)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:173)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.producers.ProducerArbiter.setProducer(ProducerArbiter.java:126)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OnSubscribeRedo$2$1.setProducer(OnSubscribeRedo.java:267)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.Subscriber.setProducer(Subscriber.java:205)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.Observable.unsafeSubscribe(Observable.java:10346)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OnSubscribeRedo$2.call(OnSubscribeRedo.java:273)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.enqueue(TrampolineScheduler.java:73)
03-14 09:36:37.977 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.schedule(TrampolineScheduler.java:52)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OnSubscribeRedo$5.request(OnSubscribeRedo.java:361)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber$1.request(OperatorSubscribeOn.java:109)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.Subscriber.setProducer(Subscriber.java:209)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.setProducer(OperatorSubscribeOn.java:105)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OnSubscribeRedo.call(OnSubscribeRedo.java:353)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OnSubscribeRedo.call(OnSubscribeRedo.java:47)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.Observable.unsafeSubscribe(Observable.java:10346)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.call(OperatorSubscribeOn.java:100)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:230)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
03-14 09:36:37.978 4418-4418/com.moreunion.zhenghao W/System.err:     at java.lang.Thread.run(Thread.java:776)