Backup creation fails with the error:
Runtime error: Can't upload `<source/folder/of/backup/file>` to `/destination/folder/of/backup/file`: Connection closed at /usr/local/psa/PMM/agents/shared/Storage/FtpFileStorage.pm line 229.
Runtime error: Can't upload /var/lib/psa/dumps/clients/client1/domains/example.com/backup_example.com_info_1504060848.xml to clients/client1/domains/example example.com/backup_example.com_info_1504060848.xml: Connection closed at /usr/local/psa/PMM/agents/shared/Storage/FtpFileStorage.pm line 245.
Backup has a big size and takes a time to be uploaded to backup node by FTP. FTP connection fails by timeout.
The behavior is caused by software issue PPA-622. The fix is included in MU #12.
Update PA to the latest version:
Increase the values of the following parameters in
/etc/proftpd.conf(if the parameters are absent, they should be added manually) on Backup Service Node:
TimeoutIdle 60000 TimeoutNoTransfer 9000
Restart the service:
# service xinetd restart