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Cisco Bug: CSCvs03023 - Clustering module needs to skip the hardware clock update to avoid the timeout error and clock jump

Last Modified

Jun 12, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

9.9(2)

Description (partial)

Symptom:
** Detected sysclock-hwclock drift:

Firepower-Module1_10_17_2019_22_43_47.tar/opt/cisco/platform/logs/ssp_ntp.log.2.gz:
ssp_ntpd.13362 [Thu Oct 17 18:00:29 UTC 2019] [@878]: INFO: detected sysclock-hwclock drift, sync hwclock
<snip>
select() to /dev/rtc to wait for clock tick timed out...synchronization failed <<< Initial failure condition
<snip>
ssp_ntpd.13362 [Thu Oct 17 18:01:20 UTC 2019] [@878]: INFO: detected sysclock-hwclock drift, sync hwclock
<snip>
Time read from Hardware Clock: 2019/12/03 18:01:27 <<< Hardware clock shows December, it's October
Setting Hardware Clock to 18:01:21 = 1571335281 seconds since 1969
Clock drifted -0.7 seconds in the past 42 seconds in spite of a drift factor of -86399.090554 seconds/day. <<< Drift of 24 hours/day.

** RTC_CMOS is bouncing around by days:

Firepower-Module1_10_17_2019_22_43_47.tar/mnt/disk0/log/asa-ssp_ntp.log.3.gz:
asa-ssp_ntp.log.3:2019-10-20 19:05:43:434 DEBUG : [ssp_ntp_api.c:269] : SSP-NTP: NTP From RTC_CMOS: 19:05:44.000 UTC Sun Oct 20 2019
asa-ssp_ntp.log.3:2019-10-20 19:06:44:455 DEBUG : [ssp_ntp_api.c:269] : SSP-NTP: NTP From RTC_CMOS: 19:06:44.000 UTC Mon Oct 21 2019 <<< move forward 1 day
asa-ssp_ntp.log.3:2019-10-21 19:07:43:337 DEBUG : [ssp_ntp_api.c:269] : SSP-NTP: NTP From RTC_CMOS: 19:08:02.000 UTC Tue Oct 22 2019 <<< move forward 1 day
asa-ssp_ntp.log.3:2019-10-22 19:08:41:265 DEBUG : [ssp_ntp_api.c:269] : SSP-NTP: NTP From RTC_CMOS: 19:08:24.000 UTC Sun Oct 20 2019 <<< move backward 2 days

Conditions:
When HW clock drift/failure is detected. Failure Message: "select() to /dev/rtc to wait for clock tick timed out...synchronization failed"
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