Signal-android: Unable to create a conversation backup

[korkosson]

Bug description

When a conversation backup is initiated there is no backup created. It seems that the backup process is running (counting messages) but when the process is finished, it says "Last backup: Never" and no backup is created.
Note: Contacts are managed via CardDAV account. Tried with 2 different phones (same type) with the same results.

Steps to reproduce

• Turn backup feature on.
• Initiate conversations backup.

Actual result: No backup created. GUI says "Last backup: Never", storage does not contain any Signal backup.
Expected result: Backup is created.

Screenshots

Device info

Device: Motorola Moto G (5) (cedric)
Android version: 7.0.10
Signal version: 4.19.3

Link to debug log

https://debuglogs.org/ca5b89147bc1ea35e41ea11faf30d0598e4f8d08a8d50cdf67691a8552e67fbe

[minnmann]

I think the relevant part is

java.io.IOException: Renaming temporary backup file failed!

If you have an SD card, that means this is probably a known bug and a duplicate of #7770, #7692. It should be fixed in 4.20.

Until 4.20 is released, the workaround is to eject the SD card (e.g. via the menu) and run the backup. I used this on a phone yesterday and it worked.

[korkosson]

Thanks for the advice, it's working as you've described. Looking forward to version 4.20 then.

I have searched in opened issues only, sorry for the duplicate bug report.

[jlund-signal]

No problem!

[yknip]

The suggested workaround fails for me on beta 4.19.3. Any idea when 4.20 will be released?

[korkosson]

It is still not working for me (Signal 4.20.9, Moto G5).

[minnmann]

It seems to be working for me - I also have a Moto G5, but running Signal 4.21.2. The phone is equipped with a SD card formatted as internal memory.

[korkosson]

Mine is formatted as external. Maybe there is some issue with SD cards mounted as external storage?

[haffenloher]

@korkosson Please post a debug log captured right after a backup fails so that the developers can investigate.