java.net.SocketTimeoutException：在收听meetup open_events流API时超时

时间：2017-04-05 07:39:57

标签： java api streaming chunked-encoding meetup

我正在尝试收听来自meetups open_events流API的无穷无尽的流。出于某种原因，我在一段随机时间之后得到了一个socketTimeoutException（似乎是）。我的代码适用于meetups rsvps流API。我正在使用okio.BufferedSource，如下所示。我得到＆＃34; while（！source.exhausted（））＆＃34;的异常，但是在写＃34;而（true）＆＃34;而是在下面的行中给出例外。据我所知，rsvps和open_events之间的区别在于rsvps使用长轮询并返回一个数组，而open_events使用分块传输编码来维持持久连接。问题是我不能使用BufferedSource进行分块响应，那么我应该使用什么呢？ 

    public static Observable<String> events(BufferedSource source) {
    return Observable.create(new Observable.OnSubscribe<String>() {
        @Override
        public void call(Subscriber<? super String> subscriber) {
            try {

                while (!source.exhausted()) {
                    subscriber.onNext(source.readUtf8Line());
                }
            } catch (IOException e) {
                e.printStackTrace();
                subscriber.onError(e);
            }
            subscriber.onCompleted();
        }
    });

完整堆栈跟踪：

java.net.SocketTimeoutException: timeout
at okio.Okio$3.newTimeoutException(Okio.java:207)
at okio.AsyncTimeout.exit(AsyncTimeout.java:261)
at okio.AsyncTimeout$2.read(AsyncTimeout.java:215)
at okio.RealBufferedSource.request(RealBufferedSource.java:71)
at okio.RealBufferedSource.require(RealBufferedSource.java:64)
at okio.RealBufferedSource.readHexadecimalUnsignedLong(RealBufferedSource.java:270)
at okhttp3.internal.http1.Http1Codec$ChunkedSource.readChunkSize(Http1Codec.java:444)
at okhttp3.internal.http1.Http1Codec$ChunkedSource.read(Http1Codec.java:425)
at okio.RealBufferedSource.read(RealBufferedSource.java:50)
at okio.ForwardingSource.read(ForwardingSource.java:35)
at  retrofit2.OkHttpCall$ExceptionCatchingRequestBody$1.read(OkHttpCall.java:285)
at okio.RealBufferedSource.exhausted(RealBufferedSource.java:60)
at com.example.meetup.MeetupListener$1.call(MeetupListener.java:123)
at com.example.meetup.MeetupListener$1.call(MeetupListener.java:118)
at rx.Observable.unsafeSubscribe(Observable.java:8666)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:250)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:147)
at rx.internal.operators.OperatorMap$MapSubscriber.onNext(OperatorMap.java:74)
at rx.internal.operators.OperatorSubscribeOn$1$1.onNext(OperatorSubscribeOn.java:53)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitScalar(OperatorMerge.java:505)
at rx.internal.operators.OperatorMerge$MergeSubscriber.tryEmit(OperatorMerge.java:463)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:246)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:147)
at rx.internal.operators.OperatorMap$MapSubscriber.onNext(OperatorMap.java:74)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:146)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:125)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:8666)
at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:170)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at okio.Okio$2.read(Okio.java:139)
at okio.AsyncTimeout$2.read(AsyncTimeout.java:211)
... 37 more
Exception in thread "RxNewThreadScheduler-1" java.lang.IllegalStateException: Exception thrown on Scheduler.Worker thread. Add `onError` handling.
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:60)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: rx.exceptions.OnErrorNotImplementedException: timeout
at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:386)
at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:383)
at rx.internal.util.ActionSubscriber.onError(ActionSubscriber.java:44)
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:157)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
at rx.internal.operators.OperatorMerge$MergeSubscriber.reportError(OperatorMerge.java:268)
at rx.internal.operators.OperatorMerge$MergeSubscriber.checkTerminate(OperatorMerge.java:812)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:573)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:562)
at rx.internal.operators.OperatorMerge$InnerSubscriber.onError(OperatorMerge.java:846)
at com.example.meetup.MeetupListener$1.call(MeetupListener.java:128)
at com.example.meetup.MeetupListener$1.call(MeetupListener.java:118)
at rx.Observable.unsafeSubscribe(Observable.java:8666)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:250)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:147)
at rx.internal.operators.OperatorMap$MapSubscriber.onNext(OperatorMap.java:74)
at rx.internal.operators.OperatorSubscribeOn$1$1.onNext(OperatorSubscribeOn.java:53)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitScalar(OperatorMerge.java:505)
at rx.internal.operators.OperatorMerge$MergeSubscriber.tryEmit(OperatorMerge.java:463)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:246)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:147)
at rx.internal.operators.OperatorMap$MapSubscriber.onNext(OperatorMap.java:74)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:146)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:125)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:50)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:8666)
at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
... 7 more
Caused by: java.net.SocketTimeoutException: timeout
at okio.Okio$3.newTimeoutException(Okio.java:207)
at okio.AsyncTimeout.exit(AsyncTimeout.java:261)
at okio.AsyncTimeout$2.read(AsyncTimeout.java:215)
at okio.RealBufferedSource.request(RealBufferedSource.java:71)
at okio.RealBufferedSource.require(RealBufferedSource.java:64)
at okio.RealBufferedSource.readHexadecimalUnsignedLong(RealBufferedSource.java:270)
at okhttp3.internal.http1.Http1Codec$ChunkedSource.readChunkSize(Http1Codec.java:444)
at okhttp3.internal.http1.Http1Codec$ChunkedSource.read(Http1Codec.java:425)
at okio.RealBufferedSource.read(RealBufferedSource.java:50)
at okio.ForwardingSource.read(ForwardingSource.java:35)
at retrofit2.OkHttpCall$ExceptionCatchingRequestBody$1.read(OkHttpCall.java:285)
at okio.RealBufferedSource.exhausted(RealBufferedSource.java:60)
at com.example.meetup.MeetupListener$1.call(MeetupListener.java:123)
... 27 more
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:170)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at okio.Okio$2.read(Okio.java:139)
at okio.AsyncTimeout$2.read(AsyncTimeout.java:211)
... 37 more

1 个答案:

答案 0 :(得分：0)

这可能没有关系，但在错误堆栈的下方会提到Add onError handling。也许您需要将此方法添加到您的实施中？

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