cassandra nodes have diff value I have 3 node cluster, problem is that for some rows , updatetime column have different value on 3 node: like :
1st node : updated_on          | 2018-08-22 17:01:30+0530
2nd node : updated_on          | 2018-08-22 17:02:30+0530
3rd node : updated_on          | 2018-08-22 17:03:30+0530

Please suggest , where i need to digging.
Depending on the version of the driver you're using, the timestamp of the data could be generated either on server, or on client (Java driver 3.x, for example). You need to check that all servers and client machines are synchronized via ntp.