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java.lang.IllegalStateException: problem parsing line: null at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:313) at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1271) at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:810) at com.android.server.net.NetworkStatsService.updateIfacesLocked(NetworkStatsService.java:721) at com.android.server.net.NetworkStatsService.updateIfaces(NetworkStatsService.java:699) at com.android.server.net.NetworkStatsService.access$000(NetworkStatsService.java:128) at com.android.server.net.NetworkStatsService$1.onReceive(NetworkStatsService.java:589) at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728) at android.os.Handler.handleCallback(Handler.java:605) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:137) at android.os.HandlerThread.run(HandlerThread.java:60)Caused by: java.io.FileNotFoundException: /proc/net/xt_qtaguid/stats: open failed: ENOENT (No such file or directory) at libcore.io.IoBridge.open(IoBridge.java:406) at java.io.FileInputStream.<init>(FileInputStream.java:78) at java.io.FileReader.<init>(FileReader.java:42) at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:272) ... 11 moreCaused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory) at libcore.io.Posix.open(Native Method) at libcore.io.BlockGuardOs.open(BlockGuardOs.java:98) at libcore.io.IoBridge.open(IoBridge.java:390) ... 14 more