[root@xdoctorx-7008 ~]# journalctl -xe
-- Subject: Unit has failed
-- Defined-By: systemd
-- Support: /mailman/listinfo/systemd-devel
--
-- Unit has failed.
--
-- The result is failed.
Apr 17 21:17:56 master systemd[1]: Unit entered failed state.
Apr 17 21:17:56 master systemd[1]: failed.
Apr 17 21:17:58 master systemd[1]: holdoff time over, scheduling
Apr 17 21:17:58 master systemd[1]: Stopped Docker Application Container Engine.
-- Subject: Unit has finished shutting down
-- Defined-By: systemd
-- Support: /mailman/listinfo/systemd-devel
--
-- Unit has finished shutting down.
Apr 17 21:17:58 master systemd[1]: start request repeated too quickly for docker
Apr 17 21:17:58 master systemd[1]: Failed to start Docker Application Container
-- Subject: Unit has failed
-- Defined-By: systemd
-- Support: /mailman/listinfo/systemd-devel
--
-- Unit has failed.
--
-- The result is failed.
Apr 17 21:17:58 master systemd[1]: Unit entered failed state.
Apr 17 21:17:58 master systemd[1]: failed.
Apr 17 21:20:01 master systemd[1]: Started Session 38 of user root.
-- Subject: Unit has finished start-up
-- Defined-By: systemd
-- Support: /mailman/listinfo/systemd-devel
--
-- Unit has finished starting up.
--
-- The start-up result is done.
Apr 17 21:20:01 master CROND[7255]: (root) CMD (/usr/lib64/sa/sa1 1 1)