Android Studio 中的 RejectedExecutionException

Question

我的应用（使用 HERE Android SDK）在进行模拟逐向导航时崩溃，异常日志如下，请告诉如何解决。

设备型号：SM-G9008V
SDK:5.0------------java.util.concurrent.RejectedExecutionException: 任务 android.os.AsyncTask$3@36d584c9 被拒绝 java.util.concurrent.ThreadPoolExecutor@23d4f7ce[运行，池大小= 9、活动线程 = 9、排队任务 = 128、已完成任务 = 828] java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2011) java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:793) java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1339) android.os.AsyncTask.executeOnExecutor(AsyncTask.java:590) com.nokia.maps.bf.c(LocationRestHandler.java:207) com.nokia.maps.bf.b(LocationRestHandler.java:198) com.nokia.maps.dn.b(PlacesReverseGeocodeRequest.java:256) com.nokia.maps.dn.a(PlacesReverseGeocodeRequest.java:28) com.nokia.maps.dn$1.run(PlacesReverseGeocodeRequest.java:104) android.os.Handler.handleCallback(Handler.java:739) android.os.Handler.dispatchMessage(Handler.java:95) android.os.Looper.loop(Looper.java:145) android.app.ActivityThread.main(ActivityThread.java:5835) java.lang.reflect.Method.invoke（本机方法） java.lang.reflect.Method.invoke(Method.java:372) com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399) com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

Answer 1

您是否同时发出许多请求？您似乎发出了太多请求，超出了未完成的最大数量：

java.util.concurrent.ThreadPoolExecutor@23d4f7ce[正在运行，池大小 = 9，活动线程 = 9，排队任务 = 128，已完成任务 = 828]

你在导航代码中做了什么？能发个sn-p吗？

Answer 2

为什么我会收到此错误消息？

如果您超过了ThreadPoolExecutor 可以排队的任务数，您将收到此错误消息。唯一一次抛出 RejectedExecutionException 是 ThreadPoolExecutor.AbortPolicy，这是默认的 RejectedExecutionHandler。

引用javadocs：

如果请求无法排队，则创建一个新线程，除非这 将超过 maximumPoolSize，在这种情况下，任务将 被拒绝。

有最大数量的任务。在此处查看此问题/答案：Is there a limit of AsyncTasks to be executed at the same time?

Answer 3

@David，下面是sn-p的代码：

if(navigationManager == null) {
            navigationManager = NavigationManager.getInstance();
            navigationManager.setMap(map);
        }

        // start listening to navigation events
        instructListener = new InstructListener();
        navigationManager.addNewInstructionEventListener(
                new WeakReference<NavigationManager.NewInstructionEventListener>(instructListener));

        // start listening to position events
        if (naviPositionListener == null) {
            naviPositionListener = new NaviPositionListener();
        }
        navigationManager.addPositionListener(
                new WeakReference<NavigationManager.PositionListener>(naviPositionListener));

        if (maneuverEventListener == null) {
            maneuverEventListener = new ManeuverEventListener();
        }
        navigationManager.addManeuverEventListener(
                new WeakReference<NavigationManager.ManeuverEventListener>(maneuverEventListener));


        if (myNavigationManagerEventListener == null) {
            myNavigationManagerEventListener = new MyNavigationManagerEventListener();
        }
        navigationManager.addNavigationManagerEventListener(new WeakReference<NavigationManager.NavigationManagerEventListener>(myNavigationManagerEventListener));

        if (rerouteListener == null) {
            rerouteListener = new MyRerouteListener();
        }
        navigationManager.addRerouteListener(new WeakReference<RerouteListener>(rerouteListener));

        if (safetySpotListener == null) {
            safetySpotListener = new MySafetySpotListener();
        }
        navigationManager.addSafetySpotListener(new WeakReference<NavigationManager.SafetySpotListener>(safetySpotListener));

        //add realistic view listener
        navigationManager.setRealisticViewMode(NavigationManager.RealisticViewMode.DAY);
        navigationManager.addRealisticViewAspectRatio(NavigationManager.AspectRatio.AR_4x3);

        if (realisticViewListener == null) {
            realisticViewListener = new MyRealisticViewListener();
        }
        navigationManager.addRealisticViewListener(
                new WeakReference<NavigationManager.RealisticViewListener>(realisticViewListener));


        //set map udpate mode
        navigationManager.setMapUpdateMode(NavigationManager.MapUpdateMode.ROADVIEW);
        navigationManager.setTrafficAvoidanceMode(NavigationManager.TrafficAvoidanceMode.DISABLE);

        //set natural guidance mode
        EnumSet<NavigationManager.NaturalGuidanceMode> modeset = navigationManager.getNaturalGuidanceMode();
        modeset.add(NavigationManager.NaturalGuidanceMode.TRAFFIC_LIGHT);
        modeset.add(NavigationManager.NaturalGuidanceMode.STOP_SIGN);
        modeset.add(NavigationManager.NaturalGuidanceMode.JUNCTION);

        navigationManager.setNaturalGuidanceMode(modeset);

        // add gps signal listener
        if (gpsSignalListener == null) {
            gpsSignalListener = new MyGpsSignalListener();
        }
        navigationManager.addGpsSignalListener(new WeakReference<NavigationManager.GpsSignalListener>(gpsSignalListener));


        if (speedWarningListener == null) {
            speedWarningListener = new MySpeedWarningListener();
        }
        navigationManager.addSpeedWarningListener(new WeakReference<NavigationManager.SpeedWarningListener>(speedWarningListener));

        //add lane info listener
        if (laneInfoListener == null) {
            laneInfoListener = new MyLaneInfoListener();
        }
        navigationManager.addLaneInfoListener(new WeakReference<NavigationManager.LaneInfoListener>(laneInfoListener));


        navigationManager.getRoadView().setOrientation(NavigationManager.RoadView.Orientation.DYNAMIC);
        navigationManager.getRoadView().addListener(new WeakReference<NavigationManager.RoadView.Listener>(roadViewListener));


        //start navigation
        long speed = 60; // meter per second
    navigationManager.simulate(mapRoute.getRoute(), speed);