RDPP automatically shutdown "received signal 15, good-bye"

[winger13]

I am unsure what happened but after a multi-hour backup this morning, my ReadyNAS Pro Pioneer unexpectedly shutdown. I downloaded and reviewed a couple of the logs and found the following, what does this mean?

upnp-av.log

[2014/12/30 08:53:18] minidlna.c:1107: warn: HTTP listening on port 8200
[2014/12/30 17:27:51] minidlna.c:154: warn: received signal 15, good-bye
[2015/01/03 13:54:50] minidlna.c:1063: warn: Starting ReadyDLNA version 1.1.0.
[2015/01/03 13:54:50] minidlna.c:1107: warn: HTTP listening on port 8200
[2015/01/04 08:12:30] upnphttp.c:997: warn: HTTP Connection closed unexpectedly
[2015/01/04 08:12:30] upnphttp.c:997: warn: HTTP Connection closed unexpectedly
[2015/01/05 09:15:03] minidlna.c:154: warn: received signal 15, good-bye

system.log

Jan 5 09:14:59 LEERNPP kernel: sd 4:0:0:0: [sde] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Jan 5 09:14:59 LEERNPP kernel: ata6.00: configured for UDMA/133
Jan 5 09:14:59 LEERNPP kernel: ata6: EH complete
Jan 5 09:14:59 LEERNPP kernel: sd 5:0:0:0: [sdf] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Jan 5 09:15:03 LEERNPP exiting on signal 15

[mdgm-ntgr]

Do you have scheduled power off enabled?

[winger13]

Oh, actually yes. I forgotten that I setup a special vacation schedule - off time is Mon 00:05 (5 minutes after midnight) but since two consecutive (large) backup jobs ran from 10PM until 9AM, the NAS shut down AFTER the second backup ran successfully.

Thanks!