David Anderson on "[Plugin: UpdraftPlus Backup and Restoration] Backup won't start"

As soon as i manually start this backup, it says "backup begun", with a log entry of :

"Scheduling a resumption (1) after 300 seconds (1460093717) in case this run gets aborted (Apr 07 22:30:17)"

However, the backup hangs and does nothing.

Here is the log :

0000.000 (0) Opened log file at time: Thu, 07 Apr 2016 22:30:17 -0700 on http://nelsonrailtown.com
0000.002 (0) UpdraftPlus WordPress backup plugin (https://updraftplus.com): 1.12.4 WP: 4.4.2 PHP: 5.6.17-0+deb8u1 (Linux nelsonrailtown.com 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u3 (2016-01-17) x86_64) MySQL: 5.5.47 WPLANG: Server: Apache/2.4.10 (Debian) safe_mode: 0 max_execution_time: 900 memory_limit: 128M (used: 10.9M | 12M) multisite: N openssl: OpenSSL 1.0.1k 8 Jan 2015 mcrypt: Y LANG: ZipArchive::addFile: Y
0000.004 (0) Free space on disk containing Updraft's temporary directory: 4257.3 MB
0000.022 (0) Tasks: Backup files: 1 (schedule: monthly) Backup DB: 1 (schedule: monthly)
0000.040 (0) Requesting semaphore lock (fd) (apparently not via scheduler)
0000.045 (0) Semaphore (fd) was stuck, set lock time to 2016-04-08 05:30:17
0000.048 (0) Semaphore (fd) reset to 1
0000.052 (0) Set semaphore last lock (fd) time to 2016-04-08 05:30:17
0000.054 (0) Semaphore lock (fd) complete
0000.062 (0) Backup run: resumption=0, nonce=8382461ee514, begun at=1460093417 (0s ago), job type=backup
0000.066 (0) Scheduling a resumption (1) after 300 seconds (1460093717) in case this run gets aborted

https://wordpress.org/plugins/updraftplus/