question Re: Please help to downgrade Ambari 2.2 to 2.1 version. (Working on a VMware, Linux). in Archives of Support Questions (Read Only)

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

pguptaalw — Thu, 19 May 2016 12:50:24 GMT

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

joao_ascenso — Thu, 19 May 2016 16:40:53 GMT

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.

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

drussell — Thu, 19 May 2016 16:49:22 GMT

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!