Failure starting system services (java.lang.RuntimeException: There must be one required installer)

应用太多，system分区空间太小。

01-01 02:45:01.188  8284  8284 E System  : ******************************************

01-01 02:45:01.189  8284  8284 E System  : ************ Failure starting system services
01-01 02:45:01.189  8284  8284 E System  : java.lang.RuntimeException: There must be one required installer
01-01 02:45:01.189  8284  8284 E System  : at com.android.server.pm.PackageManagerService.getRequiredInstallerLPr(PackageManagerService.java:2457)
01-01 02:45:01.189  8284  8284 E System  : at com.android.server.pm.PackageManagerService.<init>(PackageManagerService.java:2370)
01-01 02:45:01.189  8284  8284 E System  : at com.android.server.pm.PackageManagerService.main(PackageManagerService.java:1771)
01-01 02:45:01.189  8284  8284 E System  : at com.android.server.SystemServer.startBootstrapServices(SystemServer.java:375)
01-01 02:45:01.189  8284  8284 E System  : at com.android.server.SystemServer.run(SystemServer.java:271)
01-01 02:45:01.189  8284  8284 E System  : at com.android.server.SystemServer.main(SystemServer.java:171)
01-01 02:45:01.189  8284  8284 E System  : at java.lang.reflect.Method.invoke(Native Method)
01-01 02:45:01.189  8284  8284 E System  : at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
01-01 02:45:01.189  8284  8284 E System  : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
01-01 02:45:01.189  8284  8284 D AndroidRuntime: Shutting down VM
01-01 02:45:01.189  8284  8284 E AndroidRuntime: *** FATAL EXCEPTION IN SYSTEM PROCESS: main
01-01 02:45:01.189  8284  8284 E AndroidRuntime: java.lang.RuntimeException: There must be one required installer
01-01 02:45:01.189  8284  8284 E AndroidRuntime: at com.android.server.pm.PackageManagerService.getRequiredInstallerLPr(PackageManagerService.java:2457)
01-01 02:45:01.189  8284  8284 E AndroidRuntime: at com.android.server.pm.PackageManagerService.<init>(PackageManagerService.java:2370)
01-01 02:45:01.189  8284  8284 E AndroidRuntime: at com.android.server.pm.PackageManagerService.main(PackageManagerService.java:1771)
01-01 02:45:01.189  8284  8284 E AndroidRuntime: at com.android.server.SystemServer.startBootstrapServices(SystemServer.java:375)
01-01 02:45:01.189  8284  8284 E AndroidRuntime: at com.android.server.SystemServer.run(SystemServer.java:271)
01-01 02:45:01.189  8284  8284 E AndroidRuntime: at com.android.server.SystemServer.main(SystemServer.java:171)
01-01 02:45:01.189  8284  8284 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
01-01 02:45:01.189  8284  8284 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
01-01 02:45:01.189  8284  8284 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
01-01 02:45:01.190  8284  8284 E AndroidRuntime: Error reporting crash
01-01 02:45:01.190  8284  8284 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke interface method 'void android.app.IActivityManager.handleApplicationCrash(android.os.IBinder, android.app.ApplicationErrorReport$CrashInfo)' on a null object reference
01-01 02:45:01.190  8284  8284 E AndroidRuntime: at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:90)
01-01 02:45:01.190  8284  8284 E AndroidRuntime: at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693)
01-01 02:45:01.190  8284  8284 E AndroidRuntime: at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)