Can't Create Backup Anymore

[t-aus-m]

Is there an existing issue for this?

• I have searched the existing issues

Bug description

Since monday my phone is unable to create backups of molly. The back up fails after a few seconds.

ADB shows the following noticable events:

07-25 13:41:52.573 32128 32173 D FullBackupExporter: Exporting table: story_sends
07-25 13:41:52.790 32128 32173 W LocalBackupJobApi29: Error during backup!
07-25 13:41:52.790 32128 32173 W LocalBackupJobApi29: java.io.IOException: Size mismatch!
07-25 13:41:52.790 32128 32173 W LocalBackupJobApi29: 	at org.thoughtcrime.securesms.backup.BackupFrameOutputStream.write(BackupFrameOutputStream.java:114)
07-25 13:41:52.790 32128 32173 W LocalBackupJobApi29: 	at org.thoughtcrime.securesms.backup.FullBackupExporter.internalExport(FullBackupExporter.java:199)
07-25 13:41:52.790 32128 32173 W LocalBackupJobApi29: 	at org.thoughtcrime.securesms.backup.FullBackupExporter.export(FullBackupExporter.java:123)
07-25 13:41:52.790 32128 32173 W LocalBackupJobApi29: 	at org.thoughtcrime.securesms.jobs.LocalBackupJobApi29.onRun(LocalBackupJobApi29.java:143)
07-25 13:41:52.790 32128 32173 W LocalBackupJobApi29: 	at org.thoughtcrime.securesms.jobs.BaseJob.run(BaseJob.java:31)
07-25 13:41:52.790 32128 32173 W LocalBackupJobApi29: 	at org.thoughtcrime.securesms.jobmanager.JobRunner.run(JobRunner.java:86)
07-25 13:41:52.790 32128 32173 W LocalBackupJobApi29: 	at org.thoughtcrime.securesms.jobmanager.JobRunner.run(JobRunner.java:49)

Steps to reproduce

1. Open Backup settings
2. Start Backup
3. Wait for it to fail

Molly version

v7.8.1-2.up1-FOSS

Android version

Android 14

Device

Fairphone 5

Link to debug log

https://debuglogs.org/android/7.8.1/ee877882d6c829c670ccaadbc3fdfc93c298ff5fa93b921e23872d262c359d5a

[valldrac]

It looks like a corrupted attachment is messing up the backup. To fix this, delete the broken attachment: go to Settings > Data and Storage > Manage Storage > Review Storage, and look for a file with a black thumbnail or one that won’t open. Once you delete it, the backup should work again.

[t-aus-m]

How can I find out which file causes the backup to fail? I deleted a bunch of corrupted files from the backup, but since I have over 2 GB of media, it would take a lot of time to go through all of the files.