Thank you, this information is very helpful. On Tue, Apr 19, 2022 at 11:53 AM C. Scott Andreas <sc...@paradoxica.net> wrote:
> Hi Jai, > > Cassandra 4.0 supports CQLv3, CQLv4, and CQLv5. A driver connecting using > any of these protocols will work. Cassandra 4.0 did not remove support for > CQLv3 which makes adoption easier for a very large portion of the user > community. > > I'd recommend not specifying the protocol version in your cluster builder > and allow the client and server to negotiate the newest matching protocol > version instead. > > I wouldn't recommend attempting to force a 3.2 Java Driver to negotiate > CQLv5, though as its support is definitely incomplete. The 3.2 Java Driver > is five years old and a very large number of bugs have been fixed since > then. Newer 3.x Java Driver releases should be binary-compatible so you can > likely just bump your dependency version and immediately pick up a large > number of bugfixes. > > But yes, Java Driver 3.2 will work fine using CQLv4 or CQLv3 with > Cassandra 4.0. > > – Scott > > On Apr 19, 2022, at 11:45 AM, Jai Bheemsen Rao Dhanwada < > jaibheem...@gmail.com> wrote: > > > Thank you Scott for the information. > > I am currently using the 3.2 version of Datastax Driver and using the > Cluster Builder with Protocol Version V3. Does this mean 3.2 with > protocol version v3 can still work with Cassandra4.0 server? > > Also from the documentation > <https://docs.datastax.com/en/drivers/java/3.2/com/datastax/driver/core/Cluster.Builder.html#withProtocolVersion-com.datastax.driver.core.ProtocolVersion-> > I see that 3.2 supports upto V5 version of protocol. > > Does this mean a) 3.2 driver with V3 protocol works for cassandra 4.0 or > b) I have to change the protocol version to V4 or higher on 3.2 to be able > to work with 4.0? > > On Tue, Apr 19, 2022 at 11:15 AM C. Scott Andreas <sc...@paradoxica.net> > wrote: > >> The DataStax Java 3.x drivers work very well with Apache Cassandra 4.0. >> I'd recommend one of the more recent releases in the series, though (e.g., >> 3.6.x+). >> >> I'm not the author of this documentation, but it may refer to the fact >> that the 3.x Java Driver supports the CQL v4 wire protocol, but not the new >> v5 wire protocol introduced in Cassandra 4.0. This means that all existing >> features will continue to work fine; but a small number of new features in >> 4.0 will require a new driver before they can be adopted. >> >> A couple examples of new features in the CQLv5 wire protocol are client >> checksumming in the absence of TLS or a checksumming codec, better >> read/write failure error messages, and native duration types. >> >> – Scott >> >> On Apr 19, 2022, at 10:08 AM, Jai Bheemsen Rao Dhanwada < >> jaibheem...@gmail.com> wrote: >> >> >> Hello Erick, >> >> It looks like the 3.0+ driver is not compatible with the Cassandra 4.0 as >> per: https://docs.datastax.com/en/driver-matrix/doc/java-drivers.html >> >> The documents say it's partially compatible, what does this mean? What >> will be broken if I continue to use 3.0+ driver with Cassandra 4.0? I did a >> quick test with my application using 3.2 driver with Cassandra 4.0.3 and it >> works fine. >> >> >> On Mon, Apr 19, 2021 at 7:14 PM Jai Bheemsen Rao Dhanwada < >> jaibheem...@gmail.com> wrote: >> >>> Thank you >>> >>> On Monday, April 19, 2021, Erick Ramirez <erick.rami...@datastax.com> >>> wrote: >>> >>>> Is there a Datastax Java Driver >>>>> <https://docs.datastax.com/en/driver-matrix/doc/driver_matrix/javaDrivers.html> >>>>> Compatibility matrix available for Cassandra 4.0? >>>>> >>>> >>>> No, there isn't but the same driver versions apply to C* 4.0 under the >>>> column 3.0+. >>>> >>>> Thanks for bringing this up as it has prompted me to consider its >>>> inclusion in the official Apache Cassandra website and I've logged >>>> CASSANDRA-16617 <https://issues.apache.org/jira/browse/CASSANDRA-16617>. >>>> Cheers! >>>> >>> >> >> >> >> >> >
