我正在开发一个应用程序，该应用程序每次从传感器接收到新数据时就写入文件（我每秒接收到266ish浮点数），并且我必须存储每一分钟的数据，因此每一分钟m创建一个全新的文件并在上面写，有时，几个小时后，我得到了错误的文件描述符，我不知道到底发生了什么。通常会在至少2：30h之后发生，但可能会持续更长的时间
fun startMonitoring() {
createNewFhirPackageForCurrentMonitoring {
currentFhirPackage = it
createNewFileManagers(it)
shouldWriteLogFile = true
startFhirPackageChangerRoutine()
}
}
@Synchronized
private fun createNewFileManagers(fhirPackage: FhirPackage) {
val currentMonitoring = currentMonitoring ?: return
val folder = filesDir
.resolve(currentMonitoring.monitoringName)
.resolve(fhirPackage.packageIdentifier.toString())
dataFilesManager = BraincareDataLogFilesManager(folder)
}
///这是我每分钟更改文件的地方
private fun startFhirPackageChangerRoutine() {
fhirPackageChangerSubscription = Observable.interval(FHIR_DURATION, FHIR_DURATION, TimeUnit.SECONDS).flatMap {
Observable.fromCallable {
changeFhirPackage()
}
}.subscribe({
}, {
BleLogHelper.writeError("Error on Monitoring Package Change", it)
})
}
private fun changeFhirPackage() {
val closingFhirPackage = currentFhirPackage ?: return
val closingDataFilesManager = dataFilesManager
createNewFhirPackageForCurrentMonitoring {
currentFhirPackage = it
createNewFileManagers(it)
closingDataFilesManager?.closeOutputStreams()
}
}
//我将继续使用此功能写文件
private var differentialBridgeSignalOutputStream: ObjectOutputStream? = null
fun logDifferentialBridgeSignal(signal: BraincareBluetoothDataFrame.DifferentialBridgeSignal) {
try {
if (differentialBridgeSignalOutputStream == null) {
val file = File(folder, differentialBridgeSignalFileName)
file.parentFile.mkdirs()
file.createNewFile()
differentialBridgeSignalOutputStream = ObjectOutputStream(FileOutputStream(file))
}
differentialBridgeSignalOutputStream?.writeObject(signal)
} catch (e: IOException) {
BleLogHelper.writeError("Error writing DifferentialBridgeSignal data $signal to $differentialBridgeSignalOutputStream $e", e)
}
}
错误日志
java.io.IOException: write failed: EBADF (Bad file descriptor)
at libcore.io.IoBridge.write(IoBridge.java:558)
at java.io.FileOutputStream.write(FileOutputStream.java:326)
at java.io.ObjectOutputStream$BlockDataOutputStream.drain(ObjectOutputStream.java:1959)
at java.io.ObjectOutputStream$BlockDataOutputStream.writeByte(ObjectOutputStream.java:1999)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1475)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1227)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)
at io.b4c.brain4care.modules.monitoringservice.filesmanagers.BraincareStatusLogFilesManager.logSystemInformation(BraincareStatusLogFilesManager.kt:32)
at io.b4c.brain4care.modules.monitoringservice.BraincareMonitoringService.handleStatusFrame(BraincareMonitoringService.kt:257)
at io.b4c.brain4care.modules.monitoringservice.BraincareMonitoringService.access$handleStatusFrame(BraincareMonitoringService.kt:45)
at io.b4c.brain4care.modules.monitoringservice.BraincareMonitoringService$LocalBinder$clearAndPrepareMonitoringService$2.invoke(BraincareMonitoringService.kt:158)
at io.b4c.brain4care.modules.monitoringservice.BraincareMonitoringService$LocalBinder$clearAndPrepareMonitoringService$2.invoke(BraincareMonitoringService.kt:102)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager.processFrame(BraincareBluetoothManager.kt:797)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager.handleBluetoothNotification(BraincareBluetoothManager.kt:724)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager.access$handleBluetoothNotification(BraincareBluetoothManager.kt:40)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager$startReadingSensorNotification$3.accept(BraincareBluetoothManager.kt:632)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager$startReadingSensorNotification$3.accept(BraincareBluetoothManager.kt:40)
at io.reactivex.internal.observers.LambdaObserver.onNext(LambdaObserver.java:63)
at io.reactivex.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.drainNormal(ObservableObserveOn.java:201)
at io.reactivex.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.run(ObservableObserveOn.java:255)
at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:66)
at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:57)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)
Caused by: android.system.ErrnoException: write failed: EBADF (Bad file descriptor)
at libcore.io.Linux.writeBytes(Native Method)
at libcore.io.Linux.write(Linux.java:286)
at libcore.io.BlockGuardOs.write(BlockGuardOs.java:345)
at libcore.io.IoBridge.write(IoBridge.java:553)
at java.io.FileOutputStream.write(FileOutputStream.java:326)
at java.io.ObjectOutputStream$BlockDataOutputStream.drain(ObjectOutputStream.java:1959)
at java.io.ObjectOutputStream$BlockDataOutputStream.writeByte(ObjectOutputStream.java:1999)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1475)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1227)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)
at io.b4c.brain4care.modules.monitoringservice.filesmanagers.BraincareStatusLogFilesManager.logSystemInformation(BraincareStatusLogFilesManager.kt:32)
at io.b4c.brain4care.modules.monitoringservice.BraincareMonitoringService.handleStatusFrame(BraincareMonitoringService.kt:257)
at io.b4c.brain4care.modules.monitoringservice.BraincareMonitoringService.access$handleStatusFrame(BraincareMonitoringService.kt:45)
at io.b4c.brain4care.modules.monitoringservice.BraincareMonitoringService$LocalBinder$clearAndPrepareMonitoringService$2.invoke(BraincareMonitoringService.kt:158)
at io.b4c.brain4care.modules.monitoringservice.BraincareMonitoringService$LocalBinder$clearAndPrepareMonitoringService$2.invoke(BraincareMonitoringService.kt:102)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager.processFrame(BraincareBluetoothManager.kt:797)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager.handleBluetoothNotification(BraincareBluetoothManager.kt:724)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager.access$handleBluetoothNotification(BraincareBluetoothManager.kt:40)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager$startReadingSensorNotification$3.accept(BraincareBluetoothManager.kt:632)
at io.b4c.brain4care.modules.monitoringservice.BraincareBluetoothManager$startReadingSensorNotification$3.accept(BraincareBluetoothManager.kt:40)
at io.reactivex.internal.observers.LambdaObserver.onNext(LambdaObserver.java:63)
at io.reactivex.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.drainNormal(ObservableObserveOn.java:201)
at io.reactivex.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.run(ObservableObserveOn.java:255)
at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:66)
at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:57)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)
什么可能导致此错误，竞赛条件？它之所以难以置信，是因为它在何时会发生上非常随机