Candidate contains blocks from future exceeding clock

Staking & Delegation Operate a Stake Pool
1

Hello there o/

I’ve received a log alert this morning on my BP and Relay

“cardano.node.ChainDB:Error … Candidate contains blocks from future exceeding clock”

I checked what could be the cause, and it seems that it is related to time sync error. I checked my chrony, and everything look fine, on both my BP and Relay

Capture d’écran 2022-10-04 à 10.41.50

Both node seem to continue to run fine after this error… So i don’t know what to think. Any suggestions/check i should do to ensure everything is fine ?

2

hi,

either your clock is behind OR someone wants to cheat and has set his server’s clock some time ahead.
Do you have the block nr?

thanks,
Lauris

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3

Hello lauris, this is the full log message with slot

Candidate contains blocks from future exceeding clock skew limit: 9d900899108189fcdb6251d27368ea61a66ce66098b8347a35aa863d58367f2d at slot 73330873

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4

Slot 73330873 hasn’t even happened yet. It is still in the future.

I searched through my logs for the same block hash and found a similar log error:

Oct 04 17:48:16 relay1 cardano-node[78427]: [relay1:cardano.node.ChainDB:Info:186] [2022-10-04 07:48:16.37 UTC] Valid candidate 9d900899108189fcdb6251d27368ea61a66ce66098b8347a35aa863d58367f2d at slot 73330873
Oct 04 17:48:16 relay1 cardano-node[78427]: [relay1:cardano.node.ChainDB:Error:186] [2022-10-04 07:48:16.37 UTC] Candidate contains blocks from future exceeding clock skew limit: 9d900899108189fcdb6251d27368ea61a66ce66098b8347a35aa863d58367f2d at slot 73330873, slots 9d900899108189fcdb6251d27368ea61a66ce66098b8347a35aa863d58367f2d@73330873

Someone is not managing their pool well and now has an orphaned block. They will get more orphaned blocks if they don’t fix their clock.

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5

Yes, that is the conclusion i made as well, but i wasn’t sure 100% (i’m still learning a lot of things, my pool is pretty new) :slight_smile:

Thank you

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6

Maybe try Setting Up chrony - CoinCashew

CHG

7

Already does:

Error was with another pool not operating properly:

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