Hadoop 2 to Hadoop 3 Rolling Upgrade feasibility

[Nishtha Shah <ni...@gmail.com>]

Hi team,

While I am checking on feasible upgrade plans for this major upgrade, A
quick check if someone was able to perform a successful rolling upgrade
from Hadoop 2 to Hadoop 3.

I have gone through a couple of articles online which are suggesting to opt
for Express Upgrade and avoid Rolling upgrade. A quick check if someone was
able to successfully do a rolling upgrade in recent years.

References I have gone through:
https://blog.cloudera.com/upgrading-clusters-workloads-hadoop-2-hadoop-3/
https://cwiki.apache.org/confluence/display/HADOOP/Hadoop+2.x+to+3.x+Upgrade+Efforts
https://www.adaltas.com/en/2018/07/25/clusters-workloads-migration-hadoop-2-to-3/

Any leads/responses are appreciated.
-- 
Thanks,
Nishtha Shah