why Centos7 reboot for no reason,and there is no log in /var/log/message

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Strangely,My centos reboot several times,but I hava not found any useful log in message or secure.blow is some log I think maybe helpful.Grateful for any answer.



Oct 30 20:36:48 localhost systemd: Starting Session c43328 of user ambari-qa. 


Oct 30 20:36:48 localhost systemd: Removed slice User Slice of ambari-qa.

Oct 30 20:36:48 localhost systemd: Stopping User Slice of ambari-qa.

Oct 30 20:36:48 localhost systemd: Removed slice User Slice of ambari-qa.

Oct 30 20:36:48 localhost systemd: Stopping User Slice of ambari-qa.

Oct 30 20:40:18 localhost journal: Runtime journal is using 8.0M (max allowed 4.0G trying to leave 4.0G free of 125.6G available a?’ current limit 4.0G).

Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpuset

Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpu

Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpuacct

Oct 30 20:40:18 localhost kernel: Linux version 3.10.0-693.2.1.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) ) #1 SMP Wed Sep 6 20:06:13 UTC 2017

Oct 30 20:40:18 localhost kernel: Command line: BOOT_IMAGE=/vmlinuz-3.10.0-693.2.1.el7.x86_64 root=UUID=5f6deece-af56-4e06-9ab2-1deb815d6267 ro console=tty0 console=ttyS0 crashkernel=auto rd.lvm.lv=root_vg/lvvar rd.lvm.lv=root_vg/root rhgb quiet LANG=en_US.UTF-8

Oct 30 20:40:18 localhost kernel: e820: BIOS-provided physical RAM map:

Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009d7ff] usable

Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000000009d800-0x000000000009ffff] reserved

Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved

Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000513c7fff] usable

Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000513c8000-0x00000000524c7fff] reserved

Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000524c8000-0x0000000067edefff] usable

Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000067edf000-0x000000006b69efff] reserved

Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000006b69f000-0x000000007b69efff] ACPI NVS

Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000007b69f000-0x000000007b7fefff] ACPI data









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    Strangely,My centos reboot several times,but I hava not found any useful log in message or secure.blow is some log I think maybe helpful.Grateful for any answer.



    Oct 30 20:36:48 localhost systemd: Starting Session c43328 of user ambari-qa. 


    Oct 30 20:36:48 localhost systemd: Removed slice User Slice of ambari-qa.

    Oct 30 20:36:48 localhost systemd: Stopping User Slice of ambari-qa.

    Oct 30 20:36:48 localhost systemd: Removed slice User Slice of ambari-qa.

    Oct 30 20:36:48 localhost systemd: Stopping User Slice of ambari-qa.

    Oct 30 20:40:18 localhost journal: Runtime journal is using 8.0M (max allowed 4.0G trying to leave 4.0G free of 125.6G available a?’ current limit 4.0G).

    Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpuset

    Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpu

    Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpuacct

    Oct 30 20:40:18 localhost kernel: Linux version 3.10.0-693.2.1.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) ) #1 SMP Wed Sep 6 20:06:13 UTC 2017

    Oct 30 20:40:18 localhost kernel: Command line: BOOT_IMAGE=/vmlinuz-3.10.0-693.2.1.el7.x86_64 root=UUID=5f6deece-af56-4e06-9ab2-1deb815d6267 ro console=tty0 console=ttyS0 crashkernel=auto rd.lvm.lv=root_vg/lvvar rd.lvm.lv=root_vg/root rhgb quiet LANG=en_US.UTF-8

    Oct 30 20:40:18 localhost kernel: e820: BIOS-provided physical RAM map:

    Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009d7ff] usable

    Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000000009d800-0x000000000009ffff] reserved

    Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved

    Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000513c7fff] usable

    Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000513c8000-0x00000000524c7fff] reserved

    Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000524c8000-0x0000000067edefff] usable

    Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000067edf000-0x000000006b69efff] reserved

    Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000006b69f000-0x000000007b69efff] ACPI NVS

    Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000007b69f000-0x000000007b7fefff] ACPI data









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      Strangely,My centos reboot several times,but I hava not found any useful log in message or secure.blow is some log I think maybe helpful.Grateful for any answer.



      Oct 30 20:36:48 localhost systemd: Starting Session c43328 of user ambari-qa. 


      Oct 30 20:36:48 localhost systemd: Removed slice User Slice of ambari-qa.

      Oct 30 20:36:48 localhost systemd: Stopping User Slice of ambari-qa.

      Oct 30 20:36:48 localhost systemd: Removed slice User Slice of ambari-qa.

      Oct 30 20:36:48 localhost systemd: Stopping User Slice of ambari-qa.

      Oct 30 20:40:18 localhost journal: Runtime journal is using 8.0M (max allowed 4.0G trying to leave 4.0G free of 125.6G available a?’ current limit 4.0G).

      Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpuset

      Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpu

      Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpuacct

      Oct 30 20:40:18 localhost kernel: Linux version 3.10.0-693.2.1.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) ) #1 SMP Wed Sep 6 20:06:13 UTC 2017

      Oct 30 20:40:18 localhost kernel: Command line: BOOT_IMAGE=/vmlinuz-3.10.0-693.2.1.el7.x86_64 root=UUID=5f6deece-af56-4e06-9ab2-1deb815d6267 ro console=tty0 console=ttyS0 crashkernel=auto rd.lvm.lv=root_vg/lvvar rd.lvm.lv=root_vg/root rhgb quiet LANG=en_US.UTF-8

      Oct 30 20:40:18 localhost kernel: e820: BIOS-provided physical RAM map:

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009d7ff] usable

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000000009d800-0x000000000009ffff] reserved

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000513c7fff] usable

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000513c8000-0x00000000524c7fff] reserved

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000524c8000-0x0000000067edefff] usable

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000067edf000-0x000000006b69efff] reserved

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000006b69f000-0x000000007b69efff] ACPI NVS

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000007b69f000-0x000000007b7fefff] ACPI data









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      Strangely,My centos reboot several times,but I hava not found any useful log in message or secure.blow is some log I think maybe helpful.Grateful for any answer.



      Oct 30 20:36:48 localhost systemd: Starting Session c43328 of user ambari-qa. 


      Oct 30 20:36:48 localhost systemd: Removed slice User Slice of ambari-qa.

      Oct 30 20:36:48 localhost systemd: Stopping User Slice of ambari-qa.

      Oct 30 20:36:48 localhost systemd: Removed slice User Slice of ambari-qa.

      Oct 30 20:36:48 localhost systemd: Stopping User Slice of ambari-qa.

      Oct 30 20:40:18 localhost journal: Runtime journal is using 8.0M (max allowed 4.0G trying to leave 4.0G free of 125.6G available a?’ current limit 4.0G).

      Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpuset

      Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpu

      Oct 30 20:40:18 localhost kernel: Initializing cgroup subsys cpuacct

      Oct 30 20:40:18 localhost kernel: Linux version 3.10.0-693.2.1.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) ) #1 SMP Wed Sep 6 20:06:13 UTC 2017

      Oct 30 20:40:18 localhost kernel: Command line: BOOT_IMAGE=/vmlinuz-3.10.0-693.2.1.el7.x86_64 root=UUID=5f6deece-af56-4e06-9ab2-1deb815d6267 ro console=tty0 console=ttyS0 crashkernel=auto rd.lvm.lv=root_vg/lvvar rd.lvm.lv=root_vg/root rhgb quiet LANG=en_US.UTF-8

      Oct 30 20:40:18 localhost kernel: e820: BIOS-provided physical RAM map:

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009d7ff] usable

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000000009d800-0x000000000009ffff] reserved

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000513c7fff] usable

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000513c8000-0x00000000524c7fff] reserved

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x00000000524c8000-0x0000000067edefff] usable

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x0000000067edf000-0x000000006b69efff] reserved

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000006b69f000-0x000000007b69efff] ACPI NVS

      Oct 30 20:40:18 localhost kernel: BIOS-e820: [mem 0x000000007b69f000-0x000000007b7fefff] ACPI data







      linux centos rhel





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