On Fri, Oct 4, 2013 at 9:09 AM, Paulo Motta <[email protected]>wrote:
> I manually tried to insert and retrieve some data into both the newly > upgraded nodes and the old nodes, and the behavior was very unstable: > sometimes it worked, sometimes it didn't (TimedOutException), so I don't > think it was a network problem. > > The number of read timeouts diminished as the number of upgraded nodes > increased, until it reached stability. The logs were showing the following > messages periodically: > > ... > Two similar issues were reported, but without satisfactory responses: > > - > http://stackoverflow.com/questions/15355115/rolling-upgrade-for-cassandra-1-0-9-cluster-to-1-2-1 > - https://issues.apache.org/jira/browse/CASSANDRA-5740 > Both of these issues relate to upgrading from 1._0_.x to 1.2.x, which is not supported. Were I you, I would summarize the above experience in a JIRA ticket, as 1.1.x to 1.2.x should be a supported operation and should not unexpectedly result in decreased availability during the upgrade. =Rob
