Backup stuck, then failing at Grayjay (`com.futo.platformplayer`) due to EPIPE (broken pipe)

[eliasp]

Initiating a Seedvault-backup, it gets stuck for multiple minutes when trying to backup Grayjay (com.futo.platformplayer) and then ultimately fails.
The UI doesn't indicate any reason for the failure, except of Grayjay having a red circle with an exclamation mark in the overview of apps within Seedvault.

Android 15 (LineageOS 22.2-20250919-NIGHTLY-dubai)
Device: Motorola Edge 30 (dubai)

Looking at the logs, these lines stand out:

09-23 10:54:56.763  4436  4458 E FullBackup: Error handling backup data for com.futo.platformplayer: 
09-23 10:54:56.763  4436  4458 E FullBackup: java.io.IOException: write failed: EPIPE (Broken pipe)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.IoBridge.write(IoBridge.java:651)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at java.io.FileOutputStream.write(FileOutputStream.java:432)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at okio.Buffer.copyTo(Buffer.kt:168)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at okio.Buffer.copyTo$default(Buffer.kt:147)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at com.stevesoltys.seedvault.repo.BlobCreator$createNewBlob$saver$1.save(BlobCreator.kt:75)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at org.calyxos.seedvault.core.backends.saf.SafBackend.save(SafBackend.kt:96)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at org.calyxos.seedvault.core.backends.saf.SafBackend$save$1.invokeSuspend(Unknown Source:15)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.internal.ScopeCoroutine.afterResume(Scopes.kt:28)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:99)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:104)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:277)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:95)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:69)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source:1)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:48)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source:1)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at com.stevesoltys.seedvault.transport.ConfigurableBackupTransport.sendBackupData(ConfigurableBackupTransport.kt:194)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at android.app.backup.BackupTransport$TransportImpl.sendBackupData(BackupTransport.java:919)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at com.android.internal.backup.IBackupTransport$Stub.onTransact(IBackupTransport.java:797)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at android.os.Binder.execTransactInternal(Binder.java:1411)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at android.os.Binder.execTransact(Binder.java:1350)
09-23 10:54:56.763  4436  4458 E FullBackup: Caused by: android.system.ErrnoException: write failed: EPIPE (Broken pipe)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.Linux.writeBytes(Native Method)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.Linux.write(Linux.java:335)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.ForwardingOs.write(ForwardingOs.java:943)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.BlockGuardOs.write(BlockGuardOs.java:448)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.ForwardingOs.write(ForwardingOs.java:943)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.IoBridge.write(IoBridge.java:646)
09-23 10:54:56.763  4436  4458 E FullBackup: 	... 22 more

[grote]

Thanks for the report! Could you check the log for "timeout"? I'd be curious, if we ran into a system API timeout here as well. I think I've seen something like that before, because many ROMs haven't increased the backup timeouts as it would be needed to upload large data to the network.

Also, how much data is shown for this app in system settings?

[eliasp]

Yes, looks like you're onto something here:

09-23 10:59:49.341  1436  3373 D BackupManagerService: Timeout message received for token=68a589c6
…
09-23 10:59:52.879  1436  3373 D BackupManagerService: Timeout message received for token=14ecdca
09-23 10:59:52.919  1436  3373 D BackupManagerService: Timeout message received for token=22cd3cc9
09-23 10:59:52.919  1436  3373 V LifecycleOperationStorage: [UserID:0] Cancel: token=22cd3cc9
09-23 10:59:52.919  1436  3373 W PFTBT   : Full backup cancel of com.futo.platformplayer
09-23 10:59:52.920  4436 30424 D com.stevesoltys.seedvault.BackupMonitor: xyz.malkki.neostumbler.fdroid                                    cat: 2 id: 4
09-23 10:59:52.922  1436  3373 I BackupManagerService: [UserID:0] Killing agent host process
09-23 10:59:52.924  4436 30424 I BackupCoordinator: Cancel full backup of com.futo.platformplayer because of UNKNOWN_ERROR
09-23 10:59:52.926  4436 30424 I FullBackup: Cancel full backup for com.futo.platformplayer
09-23 10:59:52.931  4436 30424 D MemoryLogger: 41 MiB free - 83 of 124 (max 256)
09-23 10:59:52.932  4436 30424 D o.c.s.c.b.s.SafBackend: [binder:4436_A       ] save(Blob(repoId=ed2d4db511d71f23606c3fd0bf1fd54698511ce75ebf92a6b32b0257ace3ff15, name=4a13f473c33d05100886cff62d38b48696533c2c50f2814e40948701009cfcbc))
09-23 10:59:52.951  1436  2163 D ActivityManager: sync unfroze 3463 at.bitfire.davdroid for 7
09-23 10:59:52.954  1436  2298 D BackgroundInstallControlService: Package event received: 0
09-23 10:59:52.958  1436 20212 I ActivityManager: Process com.futo.platformplayer (pid 27036) has died: bkup TRNB
09-23 10:59:52.958  1436  1717 I libprocessgroup: Removed cgroup /sys/fs/cgroup/uid_10205/pid_27036
…
09-23 10:59:55.540  1436 27033 W PFTBT   : Error -1000 backing up com.futo.platformplayer
09-23 10:59:55.541  4436 30424 I BackupCoordinator: Request full backup time. Returned 0
09-23 10:59:55.542  1436 27033 I PFTBT   : Transport suggested backoff=0
09-23 10:59:55.542  4436 30424 I NotificationBackupObserver: Completed. Target: com.futo.platformplayer, status: -1000
09-23 10:59:55.542  1436 27033 W PFTBT   : Transport failed; aborting backup: -1000
09-23 10:59:55.542  1436 27033 W ActivityManager: Unbinding backup agent with no active backup
09-23 10:59:55.543  1436 27033 W BackupManagerService: [UserID:0] unbindAgent but no current connection
09-23 10:59:55.543  1436 27033 I BackupManagerService: [UserID:0] Killing agent host process
09-23 10:59:55.543  1436 27033 W ActivityManager: Process/uid not found attempting kill of com.futo.platformplayer / 10205
09-23 10:59:55.543  1436 27033 I PFTBT   : Full backup completed with status: -1000
09-23 10:59:55.544  4436 30424 I NotificationBackupObserver: Backup finished 249/294. Status: -1000
09-23 10:59:55.545  1436 27034 E BackupManagerService: Error backing up com.futo.platformplayer: write failed: EPIPE (Broken pipe)
09-23 10:59:55.546  1436  2163 W ProcessStats: Tracking association SourceState{54a423b com.stevesoltys.seedvault/10159 BTop #33941} whose proc state 2 is better than process ProcessState{d29de10 at.bitfire.davdroid/10213 pkg=at.bitfire.davdroid} proc state 14 (1 skipped)
09-23 10:59:55.546  1436 27034 W ActivityManager: Unbinding backup agent with no active backup
09-23 10:59:55.546  1436 27034 W BackupManagerService: [UserID:0] unbindAgent but no current connection
09-23 10:59:55.546  1436 27034 I BackupManagerService: [UserID:0] Killing agent host process
09-23 10:59:55.547  4436 30424 D MemoryLogger: 41 MiB free - 83 of 124 (max 256)
09-23 10:59:55.547  4436 30424 I c.s.s.r.AppBackupManager: [binder:4436_A       ] After backup finished. Success: false
09-23 10:59:55.547  4436 30424 I c.s.s.r.BlobCache: [binder:4436_A       ] Clearing cache...
09-23 10:59:55.547  4436 30424 D MemoryLogger: 41 MiB free - 83 of 124 (max 256)
09-23 10:59:55.547  1436 27034 W ActivityManager: Process/uid not found attempting kill of com.futo.platformplayer / 10205
09-23 10:59:55.548  1436 27033 I PFTBT   : Full data backup pass finished.
09-23 10:59:55.548  4436  4436 I FinalizeBackupService: onStartCommand Intent { cmp=com.stevesoltys.seedvault/.transport.backup.FinalizeBackupService } 0 1
09-23 10:59:55.548  1436 27033 V BackupManagerService: [UserID:0] Released wakelock:*backup*-0-3373
09-23 10:59:55.549  4436 30424 I BackupNotificationManager: Canceling NOTIFICATION_ID_OBSERVER
09-23 10:59:55.549  1436  2163 I ActivityManager: Background started FGS: Allowed [callingPackage: com.stevesoltys.seedvault; callingUid: 10159; uidState: TOP ; uidBFSL: [BFSL]; intent: Intent { cmp=com.stevesoltys.seedvault/.transport.backup.FinalizeBackupService }; code:PROC_STATE_TOP; tempAllowListReason:<,reasonCode:SYSTEM_ALLOW_LISTED,duration:9223372036854775807,callingUid:-1>; targetSdkVersion:35; callerTargetSdkVersion:35; startForegroundCount:0; bindFromPackage:null: isBindService:false]
09-23 10:59:55.550  1436  2163 W ForegroundServiceTypeLoggerModule: Foreground service start for UID: 10159 does not have any types
09-23 10:59:55.550  1436  2298 D BackgroundInstallControlService: Package event received: 0
09-23 10:59:55.551  4436  4436 I BackupStateManager: B - appBackupRunning: false, filesBackupRunning: ENQUEUED, appBackupWorker: SUCCEEDED
09-23 10:59:55.551  4436  4436 D ConfigurableBackupTransportService: Service destroyed.
09-23 10:59:55.554  1436 20212 W ForegroundServiceTypeLoggerModule: FGS stop call for: 10159 has no types!
09-23 10:59:55.554  4436  4436 I FinalizeBackupService: onDestroy
09-23 10:59:55.555  1436  2298 D BackgroundInstallControlService: Package event received: 0
09-23 10:59:55.720  1104  1104 I android.hardware.power-service-qti: Power setBoost: 0, duration: 0
09-23 10:59:55.759  1436  1436 I NotificationService: Cannot find enqueued record for key: 0|com.stevesoltys.seedvault|1|null|10159

[eliasp]

Also, how much data is shown for this app in system settings?

App: 447MB
User: 8.79MB
Cache: 14.12MB

[grote]

@mikeNG looks like LineageOS needs to increase backup timeouts. CalyxOS has something on their gerrit for that.

[eliasp]

@grote got a pointer to the patchset on the CalyxOS gerrit? Then I'd give it a try to see whether it helps.

[grote]

Here you go https://review.calyxos.org/c/CalyxOS/vendor_calyx/+/22132

[mikeNG]

@mikeNG looks like LineageOS needs to increase backup timeouts. CalyxOS has something on their gerrit for that.

Lineage already has this change for about a year now https://review.lineageos.org/c/LineageOS/android_vendor_lineage/+/403859

[grote]

@eliasp could you send me more of your log? like from around 09-23 10:52 to 09-23 11:01 ? Could send via email to t at grobox dot de.

[eliasp]

@grote sent you the full log via mail. Thanks a lot!

[grote]

Looks like there's two attempts in the log I received. Here's the first one that has less information:

09-23 10:33:03.084  1436 23439 I PFTBT   : Initiating full-data transport backup of com.futo.platformplayer token: 313449007
09-23 10:33:03.097  1436 23440 D BackupManagerService: [UserID:0] awaiting agent for com.futo.platformplayer
09-23 10:33:03.120  1436  1681 I ActivityManager: Start proc 23441:com.futo.platformplayer/u0a205 for backup {android/FullBackupAgent}
09-23 10:33:03.223  1436 12859 D BackupManagerService: [UserID:0] agentConnected pkg=com.futo.platformplayer agent=android.os.BinderProxy@54394cc
09-23 10:33:03.314  1436 23453 D BackupManagerService: Calling doFullBackup() on com.futo.platformplayer

09-23 10:38:03.234  1436  3373 D BackupManagerService: Timeout message received for token=4aa5d831
09-23 10:38:03.315  1436  3373 D BackupManagerService: Timeout message received for token=abf9930
09-23 10:38:03.315  1436  3373 V LifecycleOperationStorage: [UserID:0] Cancel: token=abf9930
09-23 10:38:03.316  1436  3373 W PFTBT   : Full backup cancel of com.futo.platformplayer
09-23 10:38:03.318  1436  3373 I BackupManagerService: [UserID:0] Killing agent host process
09-23 10:38:03.333  1436 23439 W PFTBT   : Error -1000 backing up com.futo.platformplayer
09-23 10:38:03.337  1436 23439 I PFTBT   : Transport suggested backoff=0
09-23 10:38:03.338  1436 23439 W PFTBT   : Transport failed; aborting backup: -1000
09-23 10:38:03.338  1436 23439 W ActivityManager: Unbinding backup agent with no active backup
09-23 10:38:03.338  1436 23439 W BackupManagerService: [UserID:0] unbindAgent but no current connection
09-23 10:38:03.338  1436 23439 I BackupManagerService: [UserID:0] Killing agent host process
09-23 10:38:03.338  1436 23439 I PFTBT   : Full backup completed with status: -1000
09-23 10:38:03.339  1436 23440 E BackupManagerService: Error backing up com.futo.platformplayer: write failed: EPIPE (Broken pipe)
09-23 10:38:03.346  1436 23440 W ActivityManager: Unbinding backup agent with no active backup
09-23 10:38:03.347  1436 23440 W BackupManagerService: [UserID:0] unbindAgent but no current connection
09-23 10:38:03.347  1436 23440 I BackupManagerService: [UserID:0] Killing agent host process
09-23 10:38:03.349  1436 23439 I PFTBT   : Full data backup pass finished.
09-23 10:38:03.350  1436 23439 V BackupManagerService: [UserID:0] Released wakelock:*backup*-0-3373

09-23 10:38:03.354  1436  1485 I ActivityManager: Process com.futo.platformplayer (pid 23441) has died: bkup TRNB

Unfortunately, there's doesn't seem to be anything helpful getting logged in the 5min it took for it to run into the timeout. These 5min without any activity probably lead to the impression that backup is "stuck".

What did get logged around that gap was:

09-23 10:33:42.119  1436  2193 D ActivityManager: freezing 3463 at.bitfire.davdroid
09-23 10:35:10.336  1436  2298 D BackgroundInstallControlService: Package event received: 0
09-23 10:36:54.371  1436  2183 D ActivityManager: sync unfroze 19877 com.nextcloud.android.beta for 6

@eliasp Could it be that you are using DavDroid (or Nextcloud app) as the backup location? It looks like the system froze these two apps, so they couldn't do the work they were supposed to do. We had similar freeze issues and it looks to me like those apps need to prevent them on their own.
If that's the case, could you please use our native WebDAV integration instead which should be faster and not run into such issues?

Here's the second one that seems didn't run into a timeout:

09-23 10:54:52.750  1436 27033 I PFTBT   : Initiating full-data transport backup of com.futo.platformplayer token: 2048719304
09-23 10:54:52.752  4436 30475 I FullBackup: Perform full backup for com.futo.platformplayer.
09-23 10:54:52.753  4436 30475 I BackupCoordinator: Get backup quota for com.futo.platformplayer. Is full backup: true.
09-23 10:54:52.753  4436 30475 I BackupCoordinator: Reported quota of 3221225472 bytes.

09-23 10:54:52.757  1436 27034 D BackupManagerService: [UserID:0] awaiting agent for com.futo.platformplayer
09-23 10:54:52.774  1436  1681 I ActivityManager: Start proc 27036:com.futo.platformplayer/u0a205 for backup {android/FullBackupAgent}
09-23 10:54:52.860  1436 16954 D BackupManagerService: [UserID:0] agentConnected pkg=com.futo.platformplayer agent=android.os.BinderProxy@97a14ce
09-23 10:54:52.915  4436 30475 I FullBackup: Check full backup size of 8196608 bytes.
09-23 10:54:52.918  1436 27049 I file_backup_helper:    Name: apps/com.futo.platformplayer/_manifest
09-23 10:54:52.918  1436 27049 I FullBackup_native: measured [/data/cache/backup_stage/_manifest] at 2560
09-23 10:54:52.919  1436 27049 I BackupRestoreController: Getting widget state for user: 0
09-23 10:54:52.919  1436 27049 D BackupManagerService: Calling doFullBackup() on com.futo.platformplayer
09-23 10:54:52.919  4436 30475 I NotificationBackupObserver: Showing progress notification for net.osmand.plus 248/294
09-23 10:54:52.920  4436 30475 I NotificationBackupObserver: 248/294 - Grayjay (com.futo.platformplayer)

09-23 10:54:53.584  4436  4458 D o.c.s.c.b.s.SafBackend: [binder:4436_3       ] save(Blob(repoId=foo, name=bar))
09-23 10:54:53.651  4436  4458 D SafHelper: Wait for children to get loaded...
09-23 10:54:54.016  1436  2246 E WifiStaIfaceAidlImpl: getCachedScanData failed with service-specific exception: android.os.ServiceSpecificException:  (code 4)
09-23 10:54:54.924  4436 29936 D SafHelper: Children loaded. Continue...
09-23 10:54:56.761  4436  4458 W o.c.s.c.b.RetryBackend: [binder:4436_3       ] Last retry reached, throwing exception...
09-23 10:54:56.763  4436  4458 E FullBackup: Error handling backup data for com.futo.platformplayer: 
09-23 10:54:56.763  4436  4458 E FullBackup: java.io.IOException: write failed: EPIPE (Broken pipe)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.IoBridge.write(IoBridge.java:651)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at java.io.FileOutputStream.write(FileOutputStream.java:432)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at okio.Buffer.copyTo(Buffer.kt:168)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at okio.Buffer.copyTo$default(Buffer.kt:147)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at com.stevesoltys.seedvault.repo.BlobCreator$createNewBlob$saver$1.save(BlobCreator.kt:75)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at org.calyxos.seedvault.core.backends.saf.SafBackend.save(SafBackend.kt:96)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at org.calyxos.seedvault.core.backends.saf.SafBackend$save$1.invokeSuspend(Unknown Source:15)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.internal.ScopeCoroutine.afterResume(Scopes.kt:28)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:99)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:104)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:277)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:95)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:69)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source:1)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:48)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source:1)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at com.stevesoltys.seedvault.transport.ConfigurableBackupTransport.sendBackupData(ConfigurableBackupTransport.kt:194)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at android.app.backup.BackupTransport$TransportImpl.sendBackupData(BackupTransport.java:919)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at com.android.internal.backup.IBackupTransport$Stub.onTransact(IBackupTransport.java:797)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at android.os.Binder.execTransactInternal(Binder.java:1411)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at android.os.Binder.execTransact(Binder.java:1350)
09-23 10:54:56.763  4436  4458 E FullBackup: Caused by: android.system.ErrnoException: write failed: EPIPE (Broken pipe)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.Linux.writeBytes(Native Method)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.Linux.write(Linux.java:335)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.ForwardingOs.write(ForwardingOs.java:943)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.BlockGuardOs.write(BlockGuardOs.java:448)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.ForwardingOs.write(ForwardingOs.java:943)
09-23 10:54:56.763  4436  4458 E FullBackup: 	at libcore.io.IoBridge.write(IoBridge.java:646)
09-23 10:54:56.763  4436  4458 E FullBackup: 	... 22 more

09-23 10:59:52.919  1436  3373 W PFTBT   : Full backup cancel of com.futo.platformplayer
09-23 10:59:52.924  4436 30424 I BackupCoordinator: Cancel full backup of com.futo.platformplayer because of UNKNOWN_ERROR
09-23 10:59:52.926  4436 30424 I FullBackup: Cancel full backup for com.futo.platformplayer
09-23 10:59:52.958  1436 20212 I ActivityManager: Process com.futo.platformplayer (pid 27036) has died: bkup TRNB
09-23 10:59:55.540  1436 27033 W PFTBT   : Error -1000 backing up com.futo.platformplayer
09-23 10:59:55.541  4436 30424 I BackupCoordinator: Request full backup time. Returned 0
09-23 10:59:55.542  1436 27033 I PFTBT   : Transport suggested backoff=0
09-23 10:59:55.542  4436 30424 I NotificationBackupObserver: Completed. Target: com.futo.platformplayer, status: -1000
09-23 10:59:55.542  1436 27033 W PFTBT   : Transport failed; aborting backup: -1000
09-23 10:59:55.542  1436 27033 W ActivityManager: Unbinding backup agent with no active backup
09-23 10:59:55.543  1436 27033 W BackupManagerService: [UserID:0] unbindAgent but no current connection
09-23 10:59:55.543  1436 27033 I BackupManagerService: [UserID:0] Killing agent host process
09-23 10:59:55.543  1436 27033 W ActivityManager: Process/uid not found attempting kill of com.futo.platformplayer / 10205
09-23 10:59:55.543  1436 27033 I PFTBT   : Full backup completed with status: -1000
09-23 10:59:55.544  4436 30424 I NotificationBackupObserver: Backup finished 249/294. Status: -1000
09-23 10:59:55.545  1436 27034 E BackupManagerService: Error backing up com.futo.platformplayer: write failed: EPIPE (Broken pipe)

09-23 10:59:55.547  4436 30424 I c.s.s.r.AppBackupManager: [binder:4436_A       ] After backup finished. Success: false
09-23 10:59:55.547  4436 30424 I c.s.s.r.BlobCache: [binder:4436_A       ] Clearing cache...
09-23 10:59:55.547  4436 30424 D MemoryLogger: 41 MiB free - 83 of 124 (max 256)
09-23 10:59:55.547  1436 27034 W ActivityManager: Process/uid not found attempting kill of com.futo.platformplayer / 10205

What is interesting here is that the RetryBackend says Last retry reached, throwing exception... while there are no other logs from RetryBackend, so we didn't see when it tried before.