目录访问出错，syslog-ng 进程占 90％ CPU 是什么原因？

John_Zhu

今天中午服务器发生了如题的错误，/var 下一个 Web 容器的临时目录无法读写，连 ls 和 df 命令都执行不了。重启后解决。我查找了这一段时间的系统日志，但是不甚明了，烦请各位大侠指点一二。以下是日志内容：
Oct 14 13:15:41 linux-kdsb syslog-ng[2790]: syslog-ng version 1.6.8 starting
Oct 14 13:15:41 linux-kdsb ifstatus:     lo
Oct 14 13:15:41 linux-kdsb ifstatus: lo is up
Oct 14 13:15:41 linux-kdsb ifstatus: 1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
Oct 14 13:15:41 linux-kdsb ifstatus:     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
Oct 14 13:15:41 linux-kdsb ifstatus:     inet 127.0.0.1/8 scope host lo
Oct 14 13:15:41 linux-kdsb ifstatus:               IP address: 127.0.0.1/8
Oct 14 13:15:41 linux-kdsb ifstatus-route: Configured routes for interface lo:
Oct 14 13:15:41 linux-kdsb ifstatus-route:   127/8 - - lo
Oct 14 13:15:41 linux-kdsb ifstatus-route: Active routes for interface lo:
Oct 14 13:15:41 linux-kdsb ifstatus-route:   127.0.0.0/8  scope link
Oct 14 13:15:41 linux-kdsb ifstatus-route: 1 of 1 configured routes for interface lo up
Oct 14 13:15:41 linux-kdsb ifup:     lo
Oct 14 13:15:41 linux-kdsb ifup:     lo
Oct 14 13:15:41 linux-kdsb ifup: IP address: 127.0.0.1/8
Oct 14 13:15:41 linux-kdsb ifup:
Oct 14 13:15:42 linux-kdsb ifup:     eth0      device: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12)
Oct 14 13:15:42 linux-kdsb ifup:     eth0      configuration: eth-id-00:21:5e:28:5b:98
Oct 14 13:15:42 linux-kdsb ifup:     eth0
Oct 14 13:15:42 linux-kdsb ifup: IP address: 172.16.6.21/24
Oct 14 13:15:42 linux-kdsb ifup:
Oct 14 13:15:42 linux-kdsb ifup:     eth1      device: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12)
Oct 14 13:15:42 linux-kdsb syslog-ng[2790]: Changing permissions on special file /dev/xconsole
Oct 14 13:15:42 linux-kdsb syslog-ng[2790]: Changing permissions on special file /dev/tty10
Oct 14 13:15:42 linux-kdsb ifup:               No configuration found for eth1
Oct 14 13:15:42 linux-kdsb auditd[3459]: Init complete, auditd 1.1.3 listening for events
Oct 14 13:15:43 linux-kdsb sshd[3723]: Server listening on :: port 22.
Oct 14 13:15:43 linux-kdsb ifup:     sit0
Oct 14 13:15:43 linux-kdsb ifup:               No configuration found for sit0
Oct 14 13:15:43 linux-kdsb rcpowersaved: CPU frequency scaling is not supported by your processor.
Oct 14 13:15:43 linux-kdsb rcpowersaved: enter 'CPUFREQ_ENABLED=no' in /etc/powersave/cpufreq to avoid this warning.
Oct 14 13:15:43 linux-kdsb rcpowersaved: Cannot load cpufreq governors - No cpufreq driver available
Oct 14 13:15:43 linux-kdsb rcpowersaved: s2ram does not know your machine. See 's2ram -i' for details. (127)
Oct 14 13:15:43 linux-kdsb rcpowersaved: Use SUSPEND2RAM_FORCE=yes to override this detection.
Oct 14 13:15:43 linux-kdsb /usr/sbin/cron[4007]: (CRON) STARTUP (V5.0)
Oct 14 13:15:44 linux-kdsb zmd: NetworkManagerModule (WARN): Failed to connect to NetworkManager
Oct 14 13:15:46 linux-kdsb kernel: klogd 1.4.1, log source = /proc/kmsg started.
Oct 14 13:15:46 linux-kdsb kernel: ACPI: Power Button (FF) [PWRF]
Oct 14 13:15:46 linux-kdsb kernel: bnx2: eth0: using MSI
Oct 14 13:15:46 linux-kdsb kernel: IA-32 Microcode Update Driver: v1.14 <tigran@veritas.com>
Oct 14 13:15:46 linux-kdsb kernel: IA-32 Microcode Update Driver v1.14 unregistered
Oct 14 13:15:46 linux-kdsb kernel: NET: Registered protocol family 10
Oct 14 13:15:46 linux-kdsb kernel: lo: Disabled Privacy Extensions
Oct 14 13:15:46 linux-kdsb kernel: ADDRCONF(NETDEV_UP): eth0: link is not ready
Oct 14 13:15:46 linux-kdsb kernel: IPv6 over IPv4 tunneling driver
Oct 14 13:15:46 linux-kdsb kernel: powernow: This module only works with AMD K7 CPUs
Oct 14 13:15:46 linux-kdsb kernel: bnx2: eth0 NIC Link is Up, 100 Mbps full duplex, receive & transmit flow control ON
Oct 14 13:15:46 linux-kdsb kernel: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Oct 14 13:15:46 linux-kdsb zmd: Daemon (WARN): Not starting remote web server
Oct 14 13:15:54 linux-kdsb kernel: eth0: no IPv6 routers present
Oct 14 13:15:54 linux-kdsb PAM-devperm[3966]: opendir(/dev/snd/*): No such file or directory
Oct 14 13:15:54 linux-kdsb gconfd (root-4190): starting (version 2.12.1), pid 4190 user 'root'
Oct 14 13:15:54 linux-kdsb gconfd (root-4190): Resolved address "xml:readonly:/etc/opt/gnome/gconf/gconf.xml.mandatory" to a read-only configuration source at position 0
Oct 14 13:15:54 linux-kdsb gconfd (root-4190): Resolved address "xml:readwrite:/root/.gconf" to a writable configuration source at position 1
Oct 14 13:15:54 linux-kdsb gconfd (root-4190): Resolved address "xml:readonly:/etc/opt/gnome/gconf/gconf.xml.defaults" to a read-only configuration source at position 2
Oct 14 13:15:56 linux-kdsb gconfd (root-4190): Resolved address "xml:readwrite:/root/.gconf" to a writable configuration source at position 0
Oct 14 13:17:00 linux-kdsb su: (to oracle) root on /dev/pts/0
Oct 14 13:18:11 linux-kdsb su: FAILED SU (to root) root on /dev/pts/0
Oct 14 13:18:31 linux-kdsb sshd[4403]: Accepted keyboard-interactive/pam for root from 220.112.21.163 port 20541 ssh2
Oct 14 13:19:16 linux-kdsb su: (to tomcat) root on none
Oct 14 13:20:27 linux-kdsb su: (to tomcat) root on none
Oct 14 13:20:40 linux-kdsb su: (to tomcat) root on none
Oct 14 13:22:01 linux-kdsb su: (to tomcat) root on none
Oct 14 13:22:11 linux-kdsb su: (to tomcat) root on none
Oct 14 13:23:02 linux-kdsb su: (to tomcat) root on none
Oct 14 13:23:08 linux-kdsb sshd[4892]: error: PAM: Authentication failure for root from 61.131.208.44
Oct 14 13:23:43 linux-kdsb su: (to tomcat) root on none
Oct 14 13:25:13 linux-kdsb su: (to tomcat) root on none
Oct 14 13:25:41 linux-kdsb su: (to tomcat) root on none
Oct 14 13:39:57 linux-kdsb gconfd (root-4190): Resolved address "xml:readwrite:/root/.gconf" to a writable configuration source at position 0
Oct 14 13:53:47 linux-kdsb sshd[5938]: error: PAM: Authentication failure for root from 122.224.128.197
Oct 14 13:55:02 linux-kdsb sshd[5970]: Accepted keyboard-interactive/pam for root from 172.16.12.222 port 2219 ssh2
Oct 14 13:55:10 linux-kdsb sshd[5970]: subsystem request for sftp
Oct 14 13:55:41 linux-kdsb proftpd[6294]: linux-kdsb.site - ProFTPD 1.3.2 (stable) (built Fri Apr 10 10:34:19 CEST 2009) standalone mode STARTUP