Cvu ntp Prerequisite Check Fails With PRVF-5410 and PRVF-5416 [ID 1384298.1] Applies to: Oracle Database-Standard Edition-Version 11.2.0.1 and laterInformation in this document applies to any platform. symptoms 11gR2 Grid Infrastructure runcluvfy. sh fails with the following: CVU outputNTP common Time Server Check started... PRVF-5410: Check of common NTP Time Server failedPRVF-5416: Query of NT P daemon failed on all nodesResult: Clock synchronization check using Network Time Protocol (NTP) failedHowever, ntp is running fine # service ntpd statusntpd (pid 20875) is running Cause This is due to bug 12313711, it happens when "ntpq" command returns only LOCAL (or. LOCL .), i. e. # ntpq-pn remote refid st t when poll reach delay offset jitter ==================== ====================================== ========================================= * 192.168.1.31 LOCAL (0) 11 u 75 128 377 0.234 0.017 Solution At the time of this writing, the bug is still being worked by Development. the workaround is to ensure ntp is configured properly with slew option, refer to note 1056693.1 for more details. [root @ rac1 ~] # More/etc/hosts127.0.0.1 localhost.oracle.com localhost # eth0-PUBLIC192.168.8.11 rac1.oracle.com rac1194258.12 rac2.oracle.com rac2 # VIP192.168.8.21 rac1-vip.oracle.com rac1-vip192.168.8.22 rac2-vip.oracle.com rac2-vip # eth1-Guest rac1-priv110.10.10.12 rac2-priv2 [root @ rac1 ~] # Nslookup rac-scanServer: 192.168.8.11Address: 192.168.8.11 #53 Name: rac-scan.oracle.comAddress: 192.168.8.31Name: rac-scan.oracle.comAddress: 192.168.8.32Name: rac-scan.oracle.comAddress: 192.168.8.33 [root @ rac1 ~] # Ntpq-p remote refid st t when poll reach delay offset jitter ==================== ========================================================== =============== * 192.168.8.180 LOCAL (0) 6 u 44 64 37 0.467 0.437 0.511 [root @ rac2 ~] # Ntpq-p remote refid st t when poll reach delay offset jitter ==================== ========================================================== =============== * 192.168.8.180 LOCAL (0) 6 u 63 64 37 0.550 0.184 0.493 [root @ rac1 ~] # Grep OPTION/etc/sysconfig/ntpdOPTIONS = "-x-u ntp: ntp-p/var/run/ntpd. pid" NTPDATE_OPTIONS = "" [root @ rac1 ~] # Ps-ef | grep ntp | grep-v grepntp 6004 1 0 10:25? At 00:00:00 ntpd-x-u ntp: ntp-p/var/run/ntpd. pid [root @ rac2 ~] # Grep OPTION/etc/sysconfig/ntpdOPTIONS = "-x-u ntp: ntp-p/var/run/ntpd. pid" NTPDATE_OPTIONS = "" [root @ rac2 ~] # Ps-ef | grep ntp | grep-v grepntp 7751 1 0 10:25? At 00:00:00 ntpd-x-u ntp: ntp-p/var/run/ntpd. pid