Raspberry Pi CPU and Trouble Shooting

Raspberry Pi CPU and Trouble Shooting

When I do top on my raspberry Pi, I saw something wrong there.
14651 root      20   0    9948   6960   6740 R  99.8  0.7   7:18.46 systemd-journal

The system-journal is always the top and taking a lot of CPU.

> sudo journalctl
[sudo] password for carl:
-- Logs begin at Wed 2016-08-31 13:24:14 CDT, end at Wed 2016-08-31 13:52:34 CDT. --
Aug 31 13:24:14 raspberrypi1 dhcpcd[597]: vethacac5b2: dhcp if_readrawpacket: Bad file descriptor
Aug 31 13:24:14 raspberrypi1 dhcpcd[597]: vethacac5b2: dhcp if_readrawpacket: Bad file descriptor

It shows that dhcp if_readrawpacket: Bad file descriptor

Reboot the system. It is good now.

References:
https://bbs.archlinux.org/viewtopic.php?id=148823