解決centos重啟關機異常慢相關問題

解決centos重啟關機異常慢相關問題

上周六淩晨協助一客戶進行伺服器資料庫升級。
資料庫升級完成後，為了檢驗伺服器重啟後資料庫能否正常啟動並主從同步，故對系統進行了reboot操作。
沒想到reboot後，伺服器一直都能PING通，但SSH卻登入不過去，且各類服務連接埠也無法串連。
焦急中等待了十多分鐘，伺服器正常啟動了，業務恢複正常。

事後查閱伺服器日誌（/var/log/messages）發現關機時出現異常慢：
Aug 4 02:14:19 localhost init: tty (/dev/tty1) main process (2380) killed by TERM signal
Aug 4 02:14:19 localhost init: tty (/dev/tty2) main process (2383) killed by TERM signal
Aug 4 02:14:19 localhost init: tty (/dev/tty3) main process (2385) killed by TERM signal
Aug 4 02:14:19 localhost init: tty (/dev/tty4) main process (2387) killed by TERM signal
Aug 4 02:14:19 localhost init: tty (/dev/tty5) main process (2389) killed by TERM signal
Aug 4 02:14:19 localhost init: tty (/dev/tty6) main process (2391) killed by TERM signal
Aug 4 02:14:19 localhost avahi-daemon[1363]: Got SIGTERM, quitting.
Aug 4 02:14:19 localhost avahi-daemon[1363]: Leaving mDNS multicast group on interface eth0.IPv4 with address 172.31.251.67.
Aug 4 02:14:20 localhost abrtd: Got signal 15, exiting
Aug 4 02:27:00 localhost acpid: exiting
Aug 4 02:27:01 localhost init: Disconnected from system bus
Aug 4 02:27:01 localhost rpcbind: rpcbind terminating on signal. Restart with "rpcbind -w"
Aug 4 02:27:01 localhost auditd[1210]: The audit daemon is exiting.
Aug 4 02:27:01 localhost kernel: type=1305 audit(1375554421.205:1706): audit_pid=0 old=1210 auid=4294967295 ses=4294967295 res=1
Aug 4 02:27:01 localhost kernel: type=1305 audit(1375554421.309:1707): audit_enabled=0 old=1 auid=4294967295 ses=4294967295 res=1
Aug 4 02:27:01 localhost kernel: Kernel logging (proc) stopped.
Aug 4 02:27:01 localhost rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="1235" x-info="http://www.rsyslog.com"] exiting on signal 15.

解決方案（還有待時間驗證）：
嘗試關閉acpid服務：

# chkconfig acpid off

引用百度百科中acpid詞條：
Advanced Configuration and PowerInterface，為替代傳統的APM電源管理標準而推出的新型電源管理標準。建議所有的筆記本使用者開啟它。一些伺服器可能不需要acpi。支援的通用操作有：“電源開關“，”電池監視“，”筆記本 Lid 開關“，“筆記本顯示屏亮度“，“休眠”， “掛機”，等等。