IssueTracker

When you disable WiFi, your Worker should have been interrupted. Can you please send us a sample app, and I can take a look.

Sure thing. Attaching the sample with the same code as in the initial comment. Please follow steps from it, I was able to reproduce it on the described emulator.

I followed your instructions and this is what I see:

I turned off WiFi and enqueued the WorkRequest:

2020-05-12 10:52:04.484 6827-6869/com.sample D/WM-Processor: Processor cancelling 068731ec-1829-4d1e-80ab-336be38e51c7
2020-05-12 10:52:04.487 6827-6869/com.sample D/WM-Processor: WorkerWrapper could not be found for 068731ec-1829-4d1e-80ab-336be38e51c7
2020-05-12 10:52:04.497 6827-6869/com.sample D/WM-GreedyScheduler: Cancelling work ID 068731ec-1829-4d1e-80ab-336be38e51c7
2020-05-12 10:52:04.552 6827-6869/com.sample D/WM-PackageManagerHelper: androidx.work.impl.background.systemalarm.RescheduleReceiver enabled
2020-05-12 10:52:04.674 6827-6869/com.sample D/WM-SystemJobScheduler: Scheduling work ID 6ac118f4-5af8-4fce-93f8-dec44f97d584 Job ID 2
2020-05-12 10:52:04.685 6827-6869/com.sample D/WM-GreedyScheduler: Starting tracking for [6ac118f4-5af8-4fce-93f8-dec44f97d584]
2020-05-12 10:52:04.713 6827-6869/com.sample D/WM-ConstraintTracker: NetworkStateTracker: initial state = [ Connected=true Validated=true Metered=true NotRoaming=true ]
2020-05-12 10:52:04.713 6827-6869/com.sample D/WM-NetworkStateTracker: Registering network callback
2020-05-12 10:52:04.748 6827-6869/com.sample D/WM-GreedyScheduler: Constraints not met: Cancelling work ID 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:04.805 6827-6864/com.sample D/WM-Processor: Processor stopping background work 068731ec-1829-4d1e-80ab-336be38e51c7
2020-05-12 10:52:04.811 6827-6864/com.sample D/WM-Processor: WorkerWrapper could not be found for 068731ec-1829-4d1e-80ab-336be38e51c7
2020-05-12 10:52:04.812 6827-6880/com.sample D/WM-NetworkStateTracker: Network capabilities changed: [ Transports: CELLULAR Capabilities: MMS&SUPL&DUN&FOTA&IMS&CBS&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&VALIDATED&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED LinkUpBandwidth>=51200Kbps LinkDnBandwidth>=102400Kbps Specifier: <1>]
2020-05-12 10:52:04.815 6827-6864/com.sample D/WM-StopWorkRunnable: StopWorkRunnable for 068731ec-1829-4d1e-80ab-336be38e51c7; Processor.stopWork = false
2020-05-12 10:52:04.841 6827-6869/com.sample D/WM-Processor: Processor stopping background work 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:04.843 6827-6869/com.sample D/WM-Processor: WorkerWrapper could not be found for 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:04.850 6827-6869/com.sample D/WM-StopWorkRunnable: StopWorkRunnable for 6ac118f4-5af8-4fce-93f8-dec44f97d584; Processor.stopWork = false

You can see that the log states that the constraints were not met.

I then enabled WiFi.

2020-05-12 10:52:25.374 6827-6880/com.sample D/WM-NetworkStateTracker: Network capabilities changed: [ Transports: WIFI Capabilities: NOT_METERED&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&VALIDATED&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED LinkUpBandwidth>=1048576Kbps LinkDnBandwidth>=1048576Kbps SignalStrength: -30]
2020-05-12 10:52:25.409 6827-6827/com.sample D/WM-WorkConstraintsTrack: Constraints met for 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:25.411 6827-6827/com.sample D/WM-GreedyScheduler: Constraints met: Scheduling work ID 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:25.416 6827-6827/com.sample D/WM-SystemJobService: onStartJob for 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:25.425 6827-6880/com.sample D/WM-NetworkStateTracker: Network capabilities changed: [ Transports: WIFI Capabilities: NOT_METERED&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&VALIDATED&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED LinkUpBandwidth>=1048576Kbps LinkDnBandwidth>=1048576Kbps SignalStrength: -30]
2020-05-12 10:52:25.443 6827-6864/com.sample D/WM-Processor: Processor: processing 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:25.444 6827-6864/com.sample D/WM-Processor: Work 6ac118f4-5af8-4fce-93f8-dec44f97d584 is already enqueued for processing
2020-05-12 10:52:25.497 6827-6827/com.sample D/WM-WorkerWrapper: Starting work for com.sample.WorkApplication$ForegroundWorker
2020-05-12 10:52:25.738 6827-6881/com.sample I/WM-Processor: Moving WorkSpec (6ac118f4-5af8-4fce-93f8-dec44f97d584) to the foreground
2020-05-12 10:52:25.775 6827-6827/com.sample I/WM-SystemFgDispatcher: Started foreground service Intent { act=ACTION_START_FOREGROUND cmp=com.sample/androidx.work.impl.foreground.SystemForegroundService (has extras) }
2020-05-12 10:52:25.783 6827-6827/com.sample D/WM-SystemFgDispatcher: Notifying with (id: 42, workSpecId: 6ac118f4-5af8-4fce-93f8-dec44f97d584, notificationType: 0)
2020-05-12 10:52:25.821 6827-6864/com.sample D/WM-WorkConstraintsTrack: Constraints met for 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:25.826 6827-6827/com.sample D/WM-SystemFgDispatcher: Notifying with (id: 42, workSpecId: 6ac118f4-5af8-4fce-93f8-dec44f97d584, notificationType: 0)
2020-05-12 10:52:25.834 6827-6917/com.sample I/System.out: Worker interval 0
2020-05-12 10:52:26.812 6827-6917/com.sample I/System.out: Worker interval 1
2020-05-12 10:52:27.814 6827-6917/com.sample I/System.out: Worker interval 2
2020-05-12 10:52:28.813 6827-6917/com.sample I/System.out: Worker interval 3
2020-05-12 10:52:29.812 6827-6917/com.sample I/System.out: Worker interval 4
2020-05-12 10:52:30.812 6827-6917/com.sample I/System.out: Worker interval 5
....

Your Worker now started running.

I subsequently waited for a couple of seconds and disabled the WiFi.

2020-05-12 10:52:38.351 6827-6880/com.sample D/WM-NetworkStateTracker: Network connection lost
2020-05-12 10:52:38.356 6827-6869/com.sample D/WM-Processor: Processor stopping background work 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:38.357 6827-6869/com.sample D/WM-Processor: WorkerWrapper could not be found for 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:38.360 6827-6869/com.sample D/WM-StopWorkRunnable: StopWorkRunnable for 6ac118f4-5af8-4fce-93f8-dec44f97d584; Processor.stopWork = false
2020-05-12 10:52:38.381 6827-6827/com.sample D/WM-GreedyScheduler: Constraints not met: Cancelling work ID 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:38.382 6827-6827/com.sample D/WM-SystemFgDispatcher: Constraints unmet for WorkSpec 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:38.383 6827-6864/com.sample D/WM-Processor: Processor stopping background work 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:38.384 6827-6864/com.sample D/WM-Processor: WorkerWrapper could not be found for 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:38.385 6827-6864/com.sample D/WM-StopWorkRunnable: StopWorkRunnable for 6ac118f4-5af8-4fce-93f8-dec44f97d584; Processor.stopWork = false
2020-05-12 10:52:38.391 6827-6881/com.sample D/WM-Processor: Processor stopping foreground work 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:38.392 6827-6881/com.sample D/WM-WorkerWrapper: Work interrupted for Work [ id=6ac118f4-5af8-4fce-93f8-dec44f97d584, tags={ com.sample.WorkApplication$ForegroundWorker } ]
2020-05-12 10:52:38.405 6827-6881/com.sample D/WM-Processor: No more foreground work. Stopping SystemForegroundService
2020-05-12 10:52:38.406 6827-6827/com.sample I/WM-SystemFgDispatcher: Stopping foreground service
2020-05-12 10:52:38.406 6827-6827/com.sample D/WM-SystemFgService: All commands completed.
2020-05-12 10:52:38.409 6827-6881/com.sample D/WM-Processor: WorkerWrapper interrupted for 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:38.411 6827-6881/com.sample D/WM-StopWorkRunnable: StopWorkRunnable for 6ac118f4-5af8-4fce-93f8-dec44f97d584; Processor.stopWork = true
2020-05-12 10:52:38.413 6827-6827/com.sample D/WM-Processor: Processor 6ac118f4-5af8-4fce-93f8-dec44f97d584 executed; reschedule = true
2020-05-12 10:52:38.413 6827-6827/com.sample D/WM-GreedyScheduler: Stopping tracking for 6ac118f4-5af8-4fce-93f8-dec44f97d584
2020-05-12 10:52:38.416 6827-6827/com.sample D/WM-NetworkStateTracker: Unregistering network callback
2020-05-12 10:52:38.428 6827-6869/com.sample I/WM-WorkerWrapper: Work [ id=6ac118f4-5af8-4fce-93f8-dec44f97d584, tags={ com.sample.WorkApplication$ForegroundWorker } ] was cancelled
    java.util.concurrent.CancellationException: Task was cancelled.
        at androidx.work.impl.utils.futures.AbstractFuture.cancellationExceptionWithCause(AbstractFuture.java:1184)
        at androidx.work.impl.utils.futures.AbstractFuture.getDoneValue(AbstractFuture.java:514)
        at androidx.work.impl.utils.futures.AbstractFuture.get(AbstractFuture.java:475)
        at androidx.work.impl.WorkerWrapper$2.run(WorkerWrapper.java:298)
        at androidx.work.impl.utils.SerialExecutor$Task.run(SerialExecutor.java:91)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:919)
2020-05-12 10:52:38.429 6827-6869/com.sample D/WM-WorkerWrapper: Work interrupted for Work [ id=6ac118f4-5af8-4fce-93f8-dec44f97d584, tags={ com.sample.WorkApplication$ForegroundWorker } ]
2020-05-12 10:52:38.436 6827-6869/com.sample D/WM-Processor: No more foreground work. SystemForegroundService is already stopped

The foreground service is correctly stopped.

Also, to see the logs I am talking about, you might want to enable verbose logging. For more information look at https://developer.android.com/topic/libraries/architecture/workmanager/advanced/custom-configuration and use Log.DEBUG.

If you have more information, I can reopen the bug.

Yep, the verbose logging was enabled to produce logs in the initial comment.

• Video with the reproducible scenario using the sample above.
• Made new logs, attaching.

Okay, I think I know what might be going on. Thanks for the logs, that really helped.

Thanks for the quick fix! Is it possible to check a snapshot of some sort with the included change?

Yeah we publish our snapshots via https://androidx.dev now. You can try using this:

Add this snippet to your build.gradle file.

allprojects {
    repositories {
        google()
        jcenter()
        maven { url 'https://androidx.dev/snapshots/builds/6490637/artifacts/repository' }
    }
}

Add this to your dependencies block:

dependencies {
    def work_version = '2.4.0-SNAPSHOT'
    implementation "androidx.work:work-runtime:$work_version"
}

Just checked the snapshot — works as expected. Thanks again!

Thanks for confirming !