Rsync "failed verification -- update discarded" Errors on SSH Destinations

UPDATE: As of May 25th, jetrsync 3.4.3 has been released to all JB5 tiers with JetBackup v5.3.19.2 and v5.4.0.3. However, upgrading the rsync package on remote destination is required to fully solve the issue.

Symptoms

Backups fail to transfer to SSH destinations.

CONFIG_TEXT: [ERROR] Failed transferring account "username" backup to destination "server 1". Error: ERROR: .jb.cagefs.flag failed verification -- update discarded.

Cause

SSH updates on destination servers have introduced a regression from a previous version that causes rsync file validation to fail.

Resolution

1. Check for any running JetBackup tasks and wait for them to finish or abort them.

   Note: Restarting the jetbackup service daemon will also automatically abort any remaining tasks.

2. Run the command to check for the needed patch in version 5.4.x and 5.3.19.

   # bash <(curl -LSs https://repo.jetlicense.com/patches/jetbackup5/Issue-SSH-60-Patch.sh)

3. Restart the service.

   # systemctl restart jetbackup5d

Additional Resources

JetBackup - Rsync verification failed -- update-discarded