DNS / NTP issue

[maafty]

Hi all,

i keep getting the below in my logs, not sure if its a DNS issue or a timing issue? everything seems to be working fine but unsure why this has started to appear in my logs since the last few days.

Code:

Aug  9 00:15:19 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 98 ticks; setting correction factor to 3320097477
Aug  9 00:51:51 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 182 ticks; setting correction factor to 3320097659
Aug  9 01:28:32 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 79 ticks; setting correction factor to 3320097738
Aug  9 01:46:19 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 282 ticks; setting correction factor to 3320098020
Aug  9 02:01:46 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 359 ticks; setting correction factor to 3320098379
Aug  9 02:31:31 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 210 ticks; setting correction factor to 3320098589
Aug  9 04:13:08 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 252 ticks; setting correction factor to 3320098841
Aug  9 04:31:52 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 12 ticks; setting correction factor to 3320098853
Aug  9 05:51:59 iscsi mDNSResponder: mDNS_Execute: mDNSPlatformRawTime went backwards by 76 ticks; setting correction factor to 3320098929
Aug  9 07:19:06 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 81 ticks; setting correction factor to 3320099010
Aug  9 08:01:52 iscsi mDNSResponder: mDNS_Execute: mDNSPlatformRawTime went backwards by 316 ticks; setting correction factor to 3320099326
Aug  9 08:41:54 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 55 ticks; setting correction factor to 3320099381
Aug  9 09:03:52 iscsi mDNSResponder: mDNSCoreReceive: mDNSPlatformRawTime went backwards by 68 ticks; setting correction factor to 3320099449
Aug  9 09:42:04 iscsi mDNSResponder: mDNS_Execute: mDNSPlatformRawTime went backwards by 164 ticks; setting correction factor to 3320099613

 

[dlavigne]

Not really a solution, but this is an interesting comment in the mdnsresponder src:

Code:

mDNSexport mStatus mDNSPlatformTimeInit(void)
    {
    // No special setup is required on Posix -- we just use gettimeofday();
    // This is not really safe, because gettimeofday can go backwards if the user manually changes the date or time
    // We should find a better way to do this
    return(mStatus_NoError);
    }

FreeNAS is Posix-compliant so I would guess that an NTP adjustment caused it?