Warning with current time on block creation

[jerkyrs]

Are the nodes using local time of server, i can see it is in Unix Epoch time, what is repercussion of incorrect time on server. Many virtual machines will use the hardware clock and may not have correctly configured time locally.

Warn 2018-12-31 16:35:54.091 isolator.go:250 isolator run action Action{Contract: base.iost, ActionName: Exec, Data: [{"parent":["IOSTowEse8dXYV7cSM7y8VMCWsvWnZAKDc9GmW9yGyBihphVMhbSF", "19557600"]}]}
 failed, status &{5 execution killed, current time : 1546274154053207760 , expireTime: 1546274154053178358}, will rollback
Error 2018-12-31 16:35:54.091 pob.go:436 verify block failed, blockNum:4046447, blockHash:4YxSxSsi8eXM8DR8JvwXh8vfcc8Uk8CmirtFyGQCSyeY. err=execution killed, current time : 1546274154053207760 , expireTime: 1546274154053178358

[jerkyrs]

Saw this today on testnet

message:  "Error 2019-02-05 16:47:48.501 pob.go:456 verify block failed, blockNum:884805, blockHash:8nxdHM9GnuczSzq8Ke5jfq5Skiwv5XZUchzn6mcVGuXZ. err=block from future"