On Thu, Nov 19, 2015 at 1:13 AM, Enrico Sola <sola.enrico...@gmail.com> wrote:
> Hi, I'm new to Cassandra and I've recently upgraded to 3.0.0 on Ubuntu > Linux 14.04 LTS, through apt-get upgrade not manual installation, after the > update all was fine so I could access to my keyspaces using cqlsh but I > can't access to Cassandra using DataStax PHP Driver because I get this > error: "No hosts available for the control connection”. > The connection parameters are the same of 2.2.3 version (and was working > fine). > I don't know if is this a bug or a problem of the PHP driver but my > systems use Cassandra and are now offline, so it's a known issue with a > solution? > I don't think the PHP driver supports Cassandra 3.0 yet. There were some changes to the system schema tables that are probably preventing it from connecting successfully. > I tried also to downgrade to 2.2.3 version but after that Cassandra didn't > start due to keyspace loading problem, I'm just looking for a quick > solution so doesn't matter if I have to downgrade to 2.2.3, so how can I do > the downgrade without lose my datas? > Downgrading major versions isn't supported, which is why we recommend that you take a snapshot before upgrading. Your only real option for downgrading without data loss is to dump your data (using cqlsh's COPY TO or something similar) and then re-load it on 2.2 (using cqlsh's COPY FROM or something similar). -- Tyler Hobbs DataStax <http://datastax.com/>
