Hello, Have a look at : https://issues.apache.org/jira/browse/CASSANDRA-5476
2013/6/28 Ananth Gundabattula <agundabatt...@threatmetrix.com> > Hello Everybody, > > We were performing an upgrade of our cluster from 1.1.10 version to 1.2.4 > . We tested the upgrade process in a QA environment and found no issues. > However in the production node, we faced loads of errors and had to abort > the upgrade process. > > I was wondering how we ran into such a situation. The main difference > between the QA environment and the production environments is the > Replication Factor. In QA , RF=1 and in production RF=3. > > Example stack traces are as seen on the other nodes are : > http://pastebin.com/fSnMAd8q > > The other observation is that the node which was being upgraded is a seed > node in the 1.1.10. We aborted right after the first node gave the above > issues. Does this mean that there will be an application downtime required > if we go for rolling upgrade on a live cluster from 1.1.10 version to 1.2.4 > version ? > > Regards, > Ananth > > > > > -- Fabien Rousseau * * <aur...@yakaz.com>www.yakaz.com
