电商网站建设教案,高级软件开发培训班,wordpress占用cpu过高,精美旅游网站案例bug描述:设置静态IP成功后,机器突然断电,然后在上电开机,发现机器一直卡在开机动画,无法成功进入桌面
第一时间抓取日志分析,Log如下:
08-13 11:26:42.455 2803 2803 I EthernetServiceImpl: Starting Ethernet service
08-13 11:26:42.457 2803 2924 D ConnectivityServ…bug描述:设置静态IP成功后,机器突然断电,然后在上电开机,发现机器一直卡在开机动画,无法成功进入桌面
第一时间抓取日志分析,Log如下:
08-13 11:26:42.455 2803 2803 I EthernetServiceImpl: Starting Ethernet service
08-13 11:26:42.457 2803 2924 D ConnectivityService: Got NetworkProvider Messenger for EthernetNetworkFactory
08-13 11:26:42.458 2803 2803 E IpConfigStore: Bad version on IP configuration file, ignore read
08-13 11:26:42.460 2803 2803 V SystemServerTiming: OnBootPhase_500_com.android.server.ConnectivityServiceInitializer took to complete: 5ms
08-13 11:26:42.460 2803 2803 E System : ******************************************
08-13 11:26:42.461 2803 2803 E System : ************ Failure starting system services
08-13 11:26:42.461 2803 2803 E System : java.lang.RuntimeException: Failed to boot service com.android.server.ConnectivityServiceInitializer: onBootPhase threw an exception during phase 500
08-13 11:26:42.461 2803 2803 E System : at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:297)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.SystemServer.startOtherServices(SystemServer.java:2694)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.SystemServer.run(SystemServer.java:939)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.SystemServer.main(SystemServer.java:649)
08-13 11:26:42.461 2803 2803 E System : at java.lang.reflect.Method.invoke(Native Method)
08-13 11:26:42.461 2803 2803 E System : at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
08-13 11:26:42.461 2803 2803 E System : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:914)
08-13 11:26:42.461 2803 2803 E System : Caused by: java.lang.NullPointerException: Attempt to read from field int android.util.ArrayMap.mSize on a null object reference in method void android.util.ArrayMap.putAll(android.util.ArrayMap)
08-13 11:26:42.461 2803 2803 E System : at android.util.ArrayMap.putAll(ArrayMap.java:705)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.ethernet.EthernetConfigStore.loadConfigFileLocked(EthernetConfigStore.java:112)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.ethernet.EthernetConfigStore.read(EthernetConfigStore.java:95)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.ethernet.EthernetConfigStore.read(EthernetConfigStore.java:87)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.ethernet.EthernetTracker.start(EthernetTracker.java:184)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.ethernet.EthernetServiceImpl.start(EthernetServiceImpl.java:102)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.ConnectivityServiceInitializer.onBootPhase(ConnectivityServiceInitializer.java:97)
08-13 11:26:42.461 2803 2803 E System : at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:294)
08-13 11:26:42.461 2803 2803 E System : ... 6 more
08-13 11:26:42.462 2803 2803 V SystemServerTiming: OnBootPhase_500 took to complete: 660ms
08-13 11:26:42.463 2803 2803 E Zygote : System zygote died with fatal exception
08-13 11:26:42.463 2803 2803 E Zygote : java.lang.RuntimeException: Failed to boot service com.android.server.ConnectivityServiceInitializer: onBootPhase threw an exception during phase 500
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:297)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.SystemServer.startOtherServices(SystemServer.java:2694)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.SystemServer.run(SystemServer.java:939)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.SystemServer.main(SystemServer.java:649)
08-13 11:26:42.463 2803 2803 E Zygote : at java.lang.reflect.Method.invoke(Native Method)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:914)
08-13 11:26:42.463 2803 2803 E Zygote : Caused by: java.lang.NullPointerException: Attempt to read from field int android.util.ArrayMap.mSize on a null object reference in method void android.util.ArrayMap.putAll(android.util.ArrayMap)
08-13 11:26:42.463 2803 2803 E Zygote : at android.util.ArrayMap.putAll(ArrayMap.java:705)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.ethernet.EthernetConfigStore.loadConfigFileLocked(EthernetConfigStore.java:112)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.ethernet.EthernetConfigStore.read(EthernetConfigStore.java:95)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.ethernet.EthernetConfigStore.read(EthernetConfigStore.java:87)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.ethernet.EthernetTracker.start(EthernetTracker.java:184)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.ethernet.EthernetServiceImpl.start(EthernetServiceImpl.java:102)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.ConnectivityServiceInitializer.onBootPhase(ConnectivityServiceInitializer.java:97)
08-13 11:26:42.463 2803 2803 E Zygote : at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:294)
08-13 11:26:42.463 2803 2803 E Zygote : ... 6 more
08-13 11:26:42.463 2803 2803 D AndroidRuntime: Shutting down VM
08-13 11:26:42.477 2803 2916 D WifiConfigStore: Reading from all stores completed in 45 ms.
08-13 11:26:42.478 2803 2803 E AndroidRuntime: *** FATAL EXCEPTION IN SYSTEM PROCESS: main
08-13 11:26:42.478 2803 2803 E AndroidRuntime: java.lang.RuntimeException: Failed to boot service com.android.server.ConnectivityServiceInitializer: onBootPhase threw an exception during phase 500
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:297)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.SystemServer.startOtherServices(SystemServer.java:2694)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.SystemServer.run(SystemServer.java:939)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.SystemServer.main(SystemServer.java:649)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:914)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: Caused by: java.lang.NullPointerException: Attempt to read from field int android.util.ArrayMap.mSize on a null object reference in method void android.util.ArrayMap.putAll(android.util.ArrayMap)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at android.util.ArrayMap.putAll(ArrayMap.java:705)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.ethernet.EthernetConfigStore.loadConfigFileLocked(EthernetConfigStore.java:112)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.ethernet.EthernetConfigStore.read(EthernetConfigStore.java:95)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.ethernet.EthernetConfigStore.read(EthernetConfigStore.java:87)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.ethernet.EthernetTracker.start(EthernetTracker.java:184)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.ethernet.EthernetServiceImpl.start(EthernetServiceImpl.java:102)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.ConnectivityServiceInitializer.onBootPhase(ConnectivityServiceInitializer.java:97)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:294)
08-13 11:26:42.478 2803 2803 E AndroidRuntime: ... 6 more
08-13 11:26:42.479 2803 2916 W WifiConfigManager: No stored networks found.
08-13 11:26:42.484 2803 2916 D AlarmManager: setImplLocked() callingPackageandroid
08-13 11:26:42.484 2803 2916 I WifiInjector: enableVerboseLogging false hal false
08-13 11:26:42.485 2803 2916 D WifiNative: enableVerboseLogging false hal false
08-13 11:26:42.485 2803 2916 E SupplicantStaIfaceHalAidlImpl: Cant call setDebugParams, ISupplicant is null
08-13 11:26:42.488 2803 2916 I WifiService: WifiService starting up with Wi-Fi disabled
08-13 11:26:42.499 2803 2803 I DropBoxManagerService: add tagsystem_server_crash isTagEnabledtrue flags0x2
08-13 11:26:42.499 2736 2736 I Zygote : ...preloaded 16430 classes in 2478ms.
08-13 11:26:42.499 2736 2736 V ZygoteInitTiming_lazy: PreloadClasses took to complete: 2478ms分析日志,发现system_server进程去启动Ethernet service,读取Ip配置的时候失败了.失败的原因:E IpConfigStore: Bad version on IP configuration file, ignore read. 上面这个先按下不表,我更好奇为什么Ethernet service启动失败,为什么导致设备一直卡在开机动画.
/frameworks/base/services/java/com/android/server/SystemServer.java服务管理,启动系统服务. 系统服务大概分成三类引导服务,核心服务,其他服务,分别对于三个方法startBootstrapServices、startCoreServices、startOtherServices、startApexServices(Android 13), 这三个函数的主要作用就是去启动不同的服务. 比如我们常见的引导服务:ActivityManagerService, PowerManagerService, LightsService, DisplayManagerService,PackageManagerService. 核心服务:BatteryService… 其他服务:AlarmManagerService,InputManagerService,ConnectivityService,WindowManagerService…
private void startOtherServices(NonNull TimingsTraceAndSlog t) {t.traceBegin(startOtherServices);mSystemServiceManager.updateOtherServicesStartIndex();...t.traceBegin(StartWindowManagerService);// WMS needs sensor service ready //WMS需要 sensor service 先启动mSystemServiceManager.startBootPhase(t, SystemService.PHASE_WAIT_FOR_SENSOR_SERVICE);//查看各种服务的启动状态(阶段)wm WindowManagerService.main(context, inputManager, !mFirstBoot, mOnlyCore,new PhoneWindowManager(), mActivityManagerService.mActivityTaskManager);ServiceManager.addService(Context.WINDOW_SERVICE, wm, /* allowIsolated */ false,DUMP_FLAG_PRIORITY_CRITICAL | DUMP_FLAG_PROTO);ServiceManager.addService(Context.INPUT_SERVICE, inputManager,/* allowIsolated */ false, DUMP_FLAG_PRIORITY_CRITICAL);t.traceEnd();...t.traceBegin(StartConnectivityService);//启动网络服务// This has to be called after NetworkManagementService, NetworkStatsService// and NetworkPolicyManager because ConnectivityService needs to take these// services to initialize.//CONNECTIVITY_SERVICE_INITIALIZER_CLASS com.android.server.ConnectivityServiceInitializermSystemServiceManager.startServiceFromJar(CONNECTIVITY_SERVICE_INITIALIZER_CLASS,CONNECTIVITY_SERVICE_APEX_PATH);networkPolicy.bindConnectivityManager();t.traceEnd();...} 系统启动了这么多的服务,万一有bug出现,如何去找是那个服务没有启动成功?没有启动成功的某个服务如何快速定位问题? 当然有办法的啦,Android 把系统启动分为了几个阶段,不同的阶段干了不同的事情,前面一个阶段的事情完成了才可以进入下一个阶段.
/* * Boot Phases 启动阶段*/
public static final int PHASE_WAIT_FOR_DEFAULT_DISPLAY 100; // maybe should be a dependency? /** * After receiving this boot phase, services can obtain lock settings data. ** 在接收到这个引导阶段之后,服务可以获得锁设置数据.*/ public static final int PHASE_LOCK_SETTINGS_READY 480; /** * After receiving this boot phase, services can safely call into core system services * such as the PowerManager or PackageManager. ** 在这个阶段之后,服务可以安全地调用核心系统服务,如 PowerManagerService 和 PackageManagerService*/
public static final int PHASE_SYSTEM_SERVICES_READY 500; /*** After receiving this boot phase, services can safely call into device specific services.* * 在这个阶段之后,可以安全调用设备特定的服务*/
public static final int PHASE_DEVICE_SPECIFIC_SERVICES_READY 520; /** * After receiving this boot phase, services can broadcast Intents. ** 在接收到这个引导阶段后,服务可以广播*/
public static final int PHASE_ACTIVITY_MANAGER_READY 550; /** * After receiving this boot phase, services can start/bind to third party apps. * Apps will be able to make Binder calls into services at this point. ** 在接收到这个引导阶段之后,服务可以启动/绑定到第三方应用程序,此时应用程序将能够使用Binder绑定服务*/ public static final int PHASE_THIRD_PARTY_APPS_CAN_START 600; /*** After receiving this boot phase, services can allow user interaction with the device.* This phase occurs when boot has completed and the home application has started.* System services may prefer to listen to this phase rather than registering a* broadcast receiver for ACTION_BOOT_COMPLETED to reduce overall latency.* * 在这个阶段之后,服务允许用户和设备交互.* 此阶段发生在引导完成并且主应用程序(home app)启动时.* 系统服务更倾向于监听这个阶段,而不是监听启动广播 ACTION_BOOT_COMPLETED,以降低延迟*/
public static final int PHASE_BOOT_COMPLETED 1000;
通过函数startBootPhase,然后根据phase确定启动到哪一步.
./frameworks/base/services/core/java/com/android/server/SystemServiceManager.java
/*** Starts the specified boot phase for all system services that have been started up to* this point.** param t trace logger* param phase The boot phase to start.*/public void startBootPhase(NonNull TimingsTraceAndSlog t, int phase) {if (phase mCurrentPhase) {throw new IllegalArgumentException(Next phase must be larger than previous);}mCurrentPhase phase;Slog.i(TAG, Starting phase mCurrentPhase);try {t.traceBegin(OnBootPhase_ phase);final int serviceLen mServices.size();for (int i 0; i serviceLen; i) {final SystemService service mServices.get(i);long time SystemClock.elapsedRealtime();t.traceBegin(OnBootPhase_ phase _ service.getClass().getName());try {service.onBootPhase(mCurrentPhase);} catch (Exception ex) {throw new RuntimeException(Failed to boot service service.getClass().getName() : onBootPhase threw an exception during phase mCurrentPhase, ex);}warnIfTooLong(SystemClock.elapsedRealtime() - time, service, onBootPhase);t.traceEnd();}} finally {t.traceEnd();}if (phase SystemService.PHASE_BOOT_COMPLETED) {final long totalBootTime SystemClock.uptimeMillis() - mRuntimeStartUptime;t.logDuration(TotalBootTime, totalBootTime);SystemServerInitThreadPool.shutdown();}}每个阶段做的事情都必须完成,假设某一个阶段执行的任务失败了.就会抛出异常,后面的就无法继续执行. 比如启动网络服务失败的,来源于上面的日志E System : java.lang.RuntimeException: Failed to boot service com.android.server.ConnectivityServiceInitializer: onBootPhase threw an exception during phase 500 解释了第二个问题:为什么卡在开机动画.(不能开机是因为以太网服务读取ipconfig.txt文件异常而一直重启服务,导致系统卡住)
gityuan_system-server Zygote家的大儿子 —— SystemServer Android进程系列第四篇—SystemServer进程的启动流程
然后回来思考第一个问题:为什么会读写文件失败?(Bad version on IP configuration file) ipconfig.txt异常是系统对文件缓存引起.因为设置静态IP时,会创建ipconfig.txt. 当(30s之内)突然掉电的时候,这些数据可能还在内存缓冲区,还没有被写进磁盘,所以数据就会丢失. 但是设备重启或者关机再开机ipconfig.txt的数据不会丢失可能是系统在启动关机/重启流程时会将内存缓冲区的数据写进磁盘. Android13以太网静态IP不保存的问题 如何解决:
方案1:找个好的ipconfig.txt文件,push到/data/misc/apexdata/com.android.tethering/misc/ethernet/ipconfig.txt替换它
方案2:保存用户的静态参数,直接删除,rm -rf /data/misc/apexdata/com.android.tethering/misc/ethernet/ipconfig.txt,然后利用开机广播在设置一次静态IP
这两个方案都是思路,都能让系统开机.
方案3:/packages/modules/Connectivity/service-t/src/com/android/server/net/IpConfigStore.java, 这个方案可以避免系统卡死,能正常开机,倒是静态IP需要重新配置.(要恢复出厂设置,才能重新设置静态ip)(所以只是解决了开机问题,ip的缓存问题未解决) 关于内存缓存在突然断电时数据丢失问题争取可以随时把内存缓存数据同步到磁盘中而不是内存缓存达到规定size时才同步写入磁盘.
/** Returns a map of network identity token and {link IpConfiguration}. */public static ArrayMapString, IpConfiguration readIpConfigurations(InputStream inputStream) {ArrayMapString, IpConfiguration networks new ArrayMap();DataInputStream in null;try {in new DataInputStream(inputStream);int version in.readInt();if (version ! 3 version ! 2 version ! 1) {loge(Bad version on IP configuration file, ignore read);
- return null;return networks;//add text}...方案4:(检测到文件被损坏,直接跳过文件读取)只是思路,尝试了下:可以避免系统卡死,能正常开机(只是解决了开机问题,ip的缓存问题为解决) 搞个判断条件,如果文件被损坏,flag变化,跳过mConfigStore.read()
private final EthernetConfigStore mConfigStore;void start(boolean isEnabled) {mFactory.register();mConfigStore.read();//负责读的// Default interface is just the first one we want to track.mIpConfigForDefaultInterface mConfigStore.getIpConfigurationForDefaultInterface();final ArrayMapString, IpConfiguration configs mConfigStore.getIpConfigurations();for (int i 0; i configs.size(); i) {mIpConfigurations.put(configs.keyAt(i), configs.valueAt(i));}...关于突然掉电造成文件读写异常引申 文件数据回写/文件掉电保护 FAQ android设备配置静态IP后无法开机
