I am using Ubuntu 15.10 32 bit operating system, Apache is shutting down

my server is Ubuntu 15.10 32-bit operating system, also i am using bitnami package in Ubuntu, so every day morning in BST time zone 7.30 am to 8.30 am between my Apache server shutting down, please suggest what is the problem.

Apache error logs:

[Sat May 14 07:41:45 2016] [warn] Init: Session Cache is not configured [hint: SSLSessionCache]
[ 2016-05-14 07:41:45.8177 20034/b7435940 agents/HelperAgent/Main.cpp:554 ]: PassengerHelperAgent online, listening at unix:/tmp/passenger.1.0.20030/generation-0/request.socket
[ 2016-05-14 07:41:45.8218 20040/b70c5700 agents/LoggingAgent/Main.cpp:272 ]: PassengerLoggingAgent online, listening at unix:/tmp/passenger.1.0.20030/generation-0/logging.socket
[Sat May 14 07:41:45 2016] [notice] Digest: generating secret for digest authentication ...
[Sat May 14 07:41:45 2016] [notice] Digest: done
[ 2016-05-14 07:41:45.9561 20054/b73bc940 agents/HelperAgent/Main.cpp:554 ]: PassengerHelperAgent online, listening at unix:/tmp/passenger.1.0.20050/generation-0/request.socket
[ 2016-05-14 07:41:45.9601 20059/b7181700 agents/LoggingAgent/Main.cpp:272 ]: PassengerLoggingAgent online, listening at unix:/tmp/passenger.1.0.20050/generation-0/logging.socket
[Sat May 14 07:41:45 2016] [notice] Apache/2.2.24 (Unix) mod_ssl/2.2.24 OpenSSL/1.0.1e DAV/2 PHP/5.4.14 Phusion_Passenger/4.0.0.rc6 configured -- resuming normal operations
[ 2016-05-14 07:41:45.9701 20054/b71beb40 Pool2/Spawner.h:739 ]: [App 20076 stdout]
[Sat May 14 07:41:50 2016] [notice] caught SIGTERM, shutting down
[Sat May 14 08:30:16 2016] [warn] Init: Session Cache is not configured [hint: SSLSessionCache]

My server system logs:

May 14 07:33:26 bjs-server console-kit-daemon[1033]: (process:19541): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
May 14 07:33:26 bjs-server console-kit-daemon[1033]: missing action
May 14 07:33:26 bjs-server console-kit-daemon[1033]: (process:19545): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
May 14 07:33:26 bjs-server console-kit-daemon[1033]: missing action
May 14 07:33:26 bjs-server console-kit-daemon[1033]: GLib-CRITICAL: Source ID 69 was not found when attempting to remove it
May 14 07:33:26 bjs-server console-kit-daemon[1033]: console-kit-daemon[1033]: GLib-CRITICAL: Source ID 69 was not found when attempting to remove it
May 14 07:35:01 bjs-server anacron[19403]: Job `cron.daily' started
May 14 07:35:01 bjs-server anacron[19608]: Updated timestamp for job `cron.daily' to 2016-05-14
May 14 07:41:40 bjs-server rsyslogd: [origin software="rsyslogd" swVersion="8.12.0" x-pid="796" x-info="http://www.rsyslog.com"] rsyslogd was HUPed