Attempt to invoke virtual method on a null object reference

[PhysicsIsAwesome]

Previous error: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference

Version 1.9.0

peergos.android
versionCode 19

On GrapheneOS (Android 16)

[ianopolous]

I've uploaded a patched apk (1.9.1) to https://github.com/Peergos/web-ui/releases/tag/v1.9.0 Can you try that?

Are you able to get a stack trace from the log?

[PhysicsIsAwesome]

Are you able to get a stack trace from the log?

type: logcat
osVersion: google/husky/husky:16/BP2A.250705.008/2025071900:user/release-keys
buffers: main,system,crash,events,kernel
level: verbose
filterRegex: DocumentFile.lastModified

--------- beginning of main
07-31 12:06:38.128 10169 17939 18077 I System.out: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:38.128 10169 17939 18077 I global  : Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:38.130 10169 17939 18077 W System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:38.131 10169 17939 18077 W global  : Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:38.131 10169 17939 18077 W global  : java.lang.NullPointerException: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:38.131 10169 17939 18077 W global  : 	at peergos.android.AndroidSyncFileSystem.getLastModified(AndroidSyncFileSystem.java:146)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at peergos.android.AndroidSyncFileSystem.setBytes(AndroidSyncFileSystem.java:236)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at peergos.server.sync.DirectorySync.applyCopyOp(DirectorySync.java:929)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at peergos.server.sync.DirectorySync.syncDir(DirectorySync.java:262)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at peergos.server.sync.DirectorySync.syncDirs(DirectorySync.java:167)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at peergos.android.SyncWorker.doWork(SyncWorker.java:126)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at androidx.work.Worker$startWork$1.invoke(Worker.kt:64)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at androidx.work.Worker$startWork$1.invoke(Worker.kt:64)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at androidx.work.WorkerKt.future$lambda$2$lambda$1(Worker.kt:100)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at androidx.work.WorkerKt.$r8$lambda$06LNzu7McnKR6G06fSbfQ2BCegc(Unknown Source:0)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at androidx.work.WorkerKt$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:0)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:651)
07-31 12:06:38.131 10169 17939 18077 W global  : 	at java.lang.Thread.run(Thread.java:1119)
07-31 12:06:55.069 10169 17939 18175 I System.out: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:55.069 10169 17939 18175 I global  : Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:55.074 10169 17939 18175 W System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:55.075 10169 17939 18175 W global  : Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:55.075 10169 17939 18175 W global  : java.lang.NullPointerException: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:06:55.075 10169 17939 18175 W global  : 	at peergos.android.AndroidSyncFileSystem.getLastModified(AndroidSyncFileSystem.java:146)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at peergos.android.AndroidSyncFileSystem.setBytes(AndroidSyncFileSystem.java:236)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at peergos.server.sync.DirectorySync.applyCopyOp(DirectorySync.java:929)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at peergos.server.sync.DirectorySync.syncDir(DirectorySync.java:262)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at peergos.server.sync.DirectorySync.syncDirs(DirectorySync.java:167)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at peergos.android.SyncWorker.doWork(SyncWorker.java:126)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at androidx.work.Worker$startWork$1.invoke(Worker.kt:64)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at androidx.work.Worker$startWork$1.invoke(Worker.kt:64)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at androidx.work.WorkerKt.future$lambda$2$lambda$1(Worker.kt:100)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at androidx.work.WorkerKt.$r8$lambda$06LNzu7McnKR6G06fSbfQ2BCegc(Unknown Source:0)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at androidx.work.WorkerKt$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:0)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:651)
07-31 12:06:55.075 10169 17939 18175 W global  : 	at java.lang.Thread.run(Thread.java:1119)
07-31 12:07:01.457 10169 17939 18177 I System.out: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:07:01.458 10169 17939 18177 I global  : Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:07:01.462 10169 17939 18177 W System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:07:01.463 10169 17939 18177 W global  : Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:07:01.463 10169 17939 18177 W global  : java.lang.NullPointerException: Attempt to invoke virtual method 'long androidx.documentfile.provider.DocumentFile.lastModified()' on a null object reference
07-31 12:07:01.463 10169 17939 18177 W global  : 	at peergos.android.AndroidSyncFileSystem.getLastModified(AndroidSyncFileSystem.java:146)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at peergos.android.AndroidSyncFileSystem.setBytes(AndroidSyncFileSystem.java:236)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at peergos.server.sync.DirectorySync.applyCopyOp(DirectorySync.java:929)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at peergos.server.sync.DirectorySync.syncDir(DirectorySync.java:262)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at peergos.server.sync.DirectorySync.syncDirs(DirectorySync.java:167)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at peergos.android.SyncWorker.doWork(SyncWorker.java:126)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at androidx.work.Worker$startWork$1.invoke(Worker.kt:64)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at androidx.work.Worker$startWork$1.invoke(Worker.kt:64)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at androidx.work.WorkerKt.future$lambda$2$lambda$1(Worker.kt:100)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at androidx.work.WorkerKt.$r8$lambda$06LNzu7McnKR6G06fSbfQ2BCegc(Unknown Source:0)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at androidx.work.WorkerKt$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:0)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:651)
07-31 12:07:01.463 10169 17939 18177 W global  : 	at java.lang.Thread.run(Thread.java:1119)
07-31 12:09:36.011 10043 17650 17650 D LogcatActivity: command: logcat --buffer=main,system,crash,events,kernel -d --dividers --format=UTC,printable,uid,descriptive --regex=DocumentFile.lastModified *:V

[PhysicsIsAwesome]

I've uploaded a patched apk (1.9.1) to https://github.com/Peergos/web-ui/releases/tag/v1.9.0 Can you try that?

Thx. I have installed it. It still displays the error as previous error in the app's sync tab. Since it says "previous" how do I know whether it occurred before or after the app update?

[ianopolous]

If it completes a sync successfully it will remove the error

[PhysicsIsAwesome]

I see. I have ran syncs for all folders and it is still shown.

[ianopolous]

Can you try this build which hopefully fixes the error you're seeing?
https://peergos.net/secret/z59vuwzfFDp45jmsA6Wj2jc9hemCjB4JJHB81iosJsA9GAVRtkbrqBs/1689512685#ixtoZkDx7Oos

[ianopolous]

I misremembered. It seems we don't remove the previous error message. If it completes a sync successfully, then you will see Status: Dir sync took ...s

[PhysicsIsAwesome]

Can you try this build which hopefully fixes the error you're seeing?
https://peergos.net/secret/z59vuwzfFDp45jmsA6Wj2jc9hemCjB4JJHB81iosJsA9GAVRtkbrqBs/1689512685#ixtoZkDx7Oos

This seems to have fixed it.

Thank you for taking care of this so quickly!