my server with latest proxmox always goes down

two times today what's up? where can I check the problem?

 

the version is 4.0 Beta 1,as i said, latest.

a part of syslog


Aug 23 00:13:02 TomRiadServer pveproxy[9701]: problem with client 41.35.102.48; Connection timed out
Aug 23 00:13:46 TomRiadServer systemd-timesyncd[695]: interval/delta/delay/jitter/drift 2048s/-0.009s/0.028s/0.019s/+12ppm
Aug 23 00:14:24 TomRiadServer pveproxy[9701]: problem with client 41.35.102.48; Connection timed out
Aug 23 00:14:24 TomRiadServer pveproxy[9701]: worker exit
Aug 23 00:14:24 TomRiadServer pveproxy[1336]: worker 9701 finished
Aug 23 00:14:24 TomRiadServer pveproxy[1336]: starting 1 worker(s)
Aug 23 00:14:24 TomRiadServer pveproxy[1336]: worker 11337 started
Aug 23 00:14:36 TomRiadServer rrdcached[1160]: flushing old values
Aug 23 00:14:36 TomRiadServer rrdcached[1160]: rotating journals
Aug 23 00:14:36 TomRiadServer rrdcached[1160]: started new journal /var/lib/rrdcached/journal/rrd.journal.1440303276.092088
Aug 23 00:14:36 TomRiadServer rrdcached[1160]: removing old journal /var/lib/rrdcached/journal/rrd.journal.1440296076.092123
Aug 23 00:14:50 TomRiadServer pvedaemon[7353]: <root@pam> successful auth for user 'lewissue@pve'
Aug 23 00:14:51 TomRiadServer pveproxy[11337]: Use of uninitialized value $raw in pattern match (m//) at /usr/share/perl5/PVE/JSONSchema.pm line 1153.
Aug 23 00:17:01 TomRiadServer CRON[11504]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Aug 23 00:23:17 TomRiadServer pvedaemon[6955]: <root@pam> successful auth for user 'root@pam'
Aug 23 00:23:27 TomRiadServer pvedaemon[11892]: starting vnc proxy UPID:TomRiadServer:00002E74:00115075:55D94ABF:vncproxy:124:root@pam:
Aug 23 00:23:27 TomRiadServer pvedaemon[6212]: <root@pam> starting task UPID:TomRiadServer:00002E74:00115075:55D94ABF:vncproxy:124:root@pam:
Aug 23 00:24:16 TomRiadServer pvedaemon[7353]: <root@pam> starting task UPID:TomRiadServer:00002EA9:00116396:55D94AF0:qmstart:113:root@pam:
Aug 23 00:24:16 TomRiadServer pvedaemon[11945]: start VM 113: UPID:TomRiadServer:00002EA9:00116396:55D94AF0:qmstart:113:root@pam:
Aug 23 00:24:16 TomRiadServer pvedaemon[11945]: Use of uninitialized value $raw in pattern match (m//) at /usr/share/perl5/PVE/JSONSchema.pm line 1153.
Aug 23 00:24:17 TomRiadServer kernel: [11397.018492] device tap113i0 entered promiscuous mode
Aug 23 00:24:17 TomRiadServer kernel: [11397.023990] vmbr0: port 13(tap113i0) entered forwarding state
Aug 23 00:24:17 TomRiadServer kernel: [11397.023998] vmbr0: port 13(tap113i0) entered forwarding state
Aug 23 00:24:19 TomRiadServer kernel: [11399.809306] kvm: zapping shadow pages for mmio generation wraparound
Aug 23 00:24:19 TomRiadServer ntpd[1152]: Listen normally on 19 tap113i0 fe80::a02c:a0ff:feb6:f2d9 UDP 123
Aug 23 00:24:19 TomRiadServer ntpd[1152]: peers refreshed
Aug 23 00:24:31 TomRiadServer pvedaemon[6212]: <root@pam> starting task UPID:TomRiadServer:00002EE3:00116958:55D94AFF:vncproxy:113:root@pam:
Aug 23 00:24:31 TomRiadServer pvedaemon[12003]: starting vnc proxy UPID:TomRiadServer:00002EE3:00116958:55D94AFF:vncproxy:113:root@pam:
Aug 23 00:40:28 TomRiadServer pveproxy[11337]: problem with client 41.35.102.48; Connection timed out
Aug 23 00:40:29 TomRiadServer pveproxy[11337]: worker exit
Aug 23 00:40:29 TomRiadServer pveproxy[1336]: worker 11337 finished
Aug 23 00:40:29 TomRiadServer pveproxy[1336]: starting 1 worker(s)
Aug 23 00:40:29 TomRiadServer pveproxy[1336]: worker 13024 started
Aug 23 00:40:56 TomRiadServer pvedaemon[6955]: worker exit
Aug 23 00:40:56 TomRiadServer pvedaemon[1328]: worker 6955 finished
Aug 23 00:40:56 TomRiadServer pvedaemon[1328]: starting 1 worker(s)
Aug 23 00:40:56 TomRiadServer pvedaemon[1328]: worker 13059 started
Aug 23 00:41:02 TomRiadServer pvedaemon[6212]: <root@pam> successful auth for user 'root@pam'
Aug 23 00:41:04 TomRiadServer pveproxy[13024]: Use of uninitialized value $raw in pattern match (m//) at /usr/share/perl5/PVE/JSONSchema.pm line 1153.
Aug 23 00:41:24 TomRiadServer pvedaemon[13059]: <root@pam> starting task UPID:TomRiadServer:00003321:0012F522:55D94EF4:vncproxy:124:root@pam:
Aug 23 00:41:24 TomRiadServer pvedaemon[13089]: starting vnc proxy UPID:TomRiadServer:00003321:0012F522:55D94EF4:vncproxy:124:root@pam:
Aug 23 00:41:54 TomRiadServer pvedaemon[6212]: <root@pam> starting task UPID:TomRiadServer:00003349:001300F2:55D94F12:qmstart:100:root@pam:
Aug 23 00:41:54 TomRiadServer pvedaemon[13129]: start VM 100: UPID:TomRiadServer:00003349:001300F2:55D94F12:qmstart:100:root@pam:
Aug 23 00:41:54 TomRiadServer pvedaemon[13129]: Use of uninitialized value $raw in pattern match (m//) at /usr/share/perl5/PVE/JSONSchema.pm line 1153.