ERROR: Signal 15 …

I am getting the ‘ERROR: Signal 15 is sent to script!’ or ‘WARNING: Job restarts due to inactivity for more than 5 minutes.’ error messages AFTER either ‘Backup database table “dbase-name_options” with “4697” records’ or ‘Backup database table “dbase-name_postmeta” with “12329” records’. I have configured a restart time in setting | jobs (max script execution time) of 20 sec, and reduced serverload in the same tab to maximum as per your advice. This has helped but still no error free completion. Copy of log below:

Log of running job

[INFO] BackWPup version 3.1.1; A project of Inpsyde GmbH
[INFO] WordPress version 3.8.1
[INFO] Blog url: http://bindaree.com.au/
[INFO] BackWPup job: Daily dbase; DBDUMP
[INFO] BackWPup cron: 0 0 * * *; Next: Thu, 30 Jan 2014 @ 00:00
[INFO] BackWPup job started manually
[INFO] PHP ver.: 5.4.24; litespeed; Linux
[INFO] Maximum PHP script execution time is 30 seconds
[INFO] Script restart time is configured to 20 seconds
[INFO] MySQL ver.: 5.1.72-cll-lve
[INFO] curl ver.: 7.19.7; NSS/3.14.0.0
[INFO] Temp folder is: /home/user/public_html/wp-content/uploads/backwpup-e9c818-temp/
[INFO] Logfile is: /home/user/public_html/wp-content/backwpup-9d418-logs/backwpup_log_e9c818_2014-01-29_16-25-49.html
[INFO] Backup type is: archive
[INFO] Backup file is: /home/user/public_html/administrator/backups/backwpup_bindaree_db_2014-01-29_16-25-49.zip
[29-Jan-2014 16:25:49] 1. Try to backup database …
[29-Jan-2014 16:25:49] Connected to database user_bindaree on localhost
[29-Jan-2014 16:25:49] Backup database table “dbase-name_commentmeta” with “0” records
[29-Jan-2014 16:25:50] Backup database table “dbase-name_comments” with “0” records
[29-Jan-2014 16:25:50] Backup database table “dbase-name_duplicator” with “1” records
[29-Jan-2014 16:25:50] Backup database table “dbase-name_dynamic_widgets” with “29” records
[29-Jan-2014 16:25:50] Backup database table “dbase-name_links” with “45” records
[29-Jan-2014 16:25:50] Backup database table “dbase-name_options” with “4698” records
[29-Jan-2014 16:31:50] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Jan-2014 16:31:50] 2. Try to backup database …
[29-Jan-2014 16:31:50] Connected to database queenbee_bindaree on localhost
[29-Jan-2014 16:31:54] Backup database table “dbase-name_page2cat” with “2” records
[29-Jan-2014 16:31:54] Backup database table “dbase-name_postmeta” with “12329” records
[29-Jan-2014 16:31:55] ERROR: Signal 15 is sent to script!
[29-Jan-2014 16:31:55] Restart will be executed now.
[29-Jan-2014 16:31:55] 3. Try to backup database …
[29-Jan-2014 16:31:55] Connected to database user_bindaree on localhost
[29-Jan-2014 16:31:57] Backup database table “dbase-name_posts” with “764” records
[29-Jan-2014 16:31:58] Backup database table “dbase-name_term_relationships” with “1683” records
[29-Jan-2014 16:37:58] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Jan-2014 16:37:59] 1. Trying to generate a manifest file …
[29-Jan-2014 16:37:59] Added manifest.json file with 5.66 kB to backup file list.
[29-Jan-2014 16:37:59] 1. Trying to create backup archive …
[29-Jan-2014 16:37:59] Compressing files as ZipArchive. Please be patient, this may take a moment.
[29-Jan-2014 16:37:59] Backup archive created.
[29-Jan-2014 16:37:59] Archive size is 2.07 kB.
[29-Jan-2014 16:37:59] 4 Files with 226.00 B in Archive.
[29-Jan-2014 16:38:00] One backup file deleted
[29-Jan-2014 16:38:00] 1. Try to send backup file to Dropbox …
[29-Jan-2014 16:38:01] Authenticated with Dropbox of user name
[29-Jan-2014 16:38:01] Uploading to Dropbox …
[29-Jan-2014 16:44:00] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Jan-2014 16:44:00] 2. Try to send backup file to Dropbox …
[29-Jan-2014 16:44:01] Authenticated with Dropbox of user name
[29-Jan-2014 16:44:01] Uploading to Dropbox …
[29-Jan-2014 16:49:04] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Jan-2014 16:49:04] 3. Try to send backup file to Dropbox …
[29-Jan-2014 16:49:05] Authenticated with Dropbox of user name
[29-Jan-2014 16:49:05] Uploading to Dropbox …
[29-Jan-2014 16:54:07] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Jan-2014 16:54:07] 3 old logs deleted
[29-Jan-2014 16:54:07] ERROR: Job has ended with errors in 1698 seconds. You must resolve the errors for correct execution.

http://wordpress.org/plugins/backwpup/