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From Brian Jeltema <>
Subject Re: how to roll back HDP 2.1 -> HDP 2.2 upgrade
Date Mon, 21 Dec 2015 01:07:56 GMT
> How large is the cluster?

About 25 service nodes and 5 client nodes

> Do you still have the HDP-2.1 binaries deployed? HDP-2.2 uses a different packaging structure
through versioned rpms - so the layout should not have overwritten the earlier installations.

I followed the upgrade cookbook; I’m not clear on the state of the 2.1 binaries, or how
to restore
the original config files.

> At a very high level you need to
> * Stop any running services
> * Uninstall 2.2
> * set the cluster version back to HDP-2.1
> * revert the configs back to what you have for HDP-2.1 (by applying older versions)

These details are what I was hoping to get information about (other than stopping the services).

> * Start all services
> What errors do you see with HDP-2.2. We can also look at the errors and see if configs
can be modified so that 2.2 works.

Lots of different problems. Hive shell hangs. Ambari start/stop operations don’t work. HBase
problems finding rows in the keystone.
Clients that keep trying to load from repositories other than the one I have configured. So
many issues that reverting
seems like the only sensible option.


> ________________________________________
> From: Brian Jeltema <>
> Sent: Sunday, December 20, 2015 4:35 AM
> To:
> Subject: how to roll back HDP 2.1 -> HDP 2.2 upgrade
> Running Ambari 2.0.2, I tried to do an upgrade to the HDP 2.2 stack. That upgrade
> has been a disaster, and the cluster is totally screwed up. At this point I think my
> bet is to rollback to HDP 2.1 and try again another time.
> I didn’t see a discussion of how to do a rollback. Is this documented somewhere?
> If not, can someone provide guidance?
> Thanks.
> Brian

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