Please help to downgrade Ambari 2.2 to 2.1 version. (Working on a VMware, Linux).

[#1 · Accepted solution]

I Prateek,

I have successfully done a downgrade from 2.4 to 2,3, but to be able to do this I had to had a complete backup of the ambari database from before the upgrade. I suspect the process would be similar.

the process was:

• stop all ambari daemons
• remove all ambari packages
• install the old version ambari packages
• delete the old ambari database and load from the backup
• start ambari server, check if its working
• start ambari agents

If you dont have a backup of the 2.1 database then I doubt you can safely do the downgrade, there are a number of upgrade sql scripts that run when you upgrade but there are no equivalent scripts to go backwards.

[#2]

Hi @Prateek Gupta.

This question has been answered previously here:

https://community.hortonworks.com/questions/13782/downgrade-of-ambari-22-to-21.html

Hope that helps!