Full backup would fail with below error if Jenkins home is sym link to another directory in the filesystem. Ex: /var/lib/jenkins -> /mnt/jenkins_home/
Could not create archive /tmp/backup_2020_01_15_10_30_08_201.tar.gz You must set at least one file.
Jan 15, 2020 10:30:08 AM WARNING org.jenkinsci.plugins.periodicbackup.PeriodicBackup execute
Backup failure tmp/backup_2020_01_15_10_30_08_201.tar.gz (No such file or directory)```