Re: Cassandra 4.0 and python

[Paul Chandler]

Thanks Kane,

If anyone else is interested in this, I created a Jira ticket : 
https://issues.apache.org/jira/browse/CASSANDRA-16641 
 but the response is 
that 3.6 is the minimum official supported version, although 2.7 still should 
work. This is why the Debian packaging was changed. 

Thanks 

Paul  



> On 29 Apr 2021, at 00:27, Kane Wilson  wrote:
> 
> No, I suspect the deb package dependencies haven't been updated correctly, as 
> 2.7 should definitely still work. Could you raise a JIRA for this issue?
> 
> Not sure if apt has some way to force install/ignore dependencies, however if 
> you do that it may work, otherwise your only workaround would be to install 
> from the tarball.
> 
> raft.so  - Cassandra consulting, support, and managed 
> services
> 
> 
> On Thu, Apr 29, 2021 at 2:24 AM Paul Chandler  > wrote:
> Hi all,
> 
> We have been testing with 4.0~beta2 in our setup for a few weeks and all has 
> gone very smoothly, however when tried to install 4.0~rc1 we ran into 
> problems with python versions.
> 
> We are on Ubuntu 16.04.7 LTS so use apt to install Cassandra, and this now 
> gives the following error:
> 
> The following packages have unmet dependencies:
>  cassandra : Depends: python3 (>= 3.6) but 3.5.1-3 is to be installed
> E: Unable to correct problems, you have held broken packages.
> 
> Looking at the apt packaging the requirement for python has changed from 2.7 
> to 3.6 between beta4 and rc1. 
> 
> I have found https://issues.apache.org/jira/browse/CASSANDRA-16396 
>  which says it needed 
> to be python 3.6, however reading this ticket this seems to imply 2.7 is 
> still supported https://issues.apache.org/jira/browse/CASSANDRA-15659 
> 
> 
> Also the code for for cqlsh says it supports 2.7 as well:  
> https://github.com/apache/cassandra/blob/b0c50c10dbc443a05662b111a971a65cafa258d5/bin/cqlsh#L65
>  
> 
> 
> All our clusters are currently on Ubuntu 16.04 which does not come with 
> python 3.6, so this is going to be a major pain to upgrade them to 4.0.
> 
> Does the apt packaging really need to specify 3.6 ?
> 
> Thanks 
> 
> Paul Chandler

Re: Cassandra 4.0 and python

[Kane Wilson]

No, I suspect the deb package dependencies haven't been updated
correctly, as 2.7 should definitely still work. Could you raise a JIRA for
this issue?

Not sure if apt has some way to force install/ignore dependencies, however
if you do that it may work, otherwise your only workaround would be to
install from the tarball.

raft.so - Cassandra consulting, support, and managed services


On Thu, Apr 29, 2021 at 2:24 AM Paul Chandler  wrote:

> Hi all,
>
> We have been testing with 4.0~beta2 in our setup for a few weeks and all
> has gone very smoothly, however when tried to install 4.0~rc1 we ran into
> problems with python versions.
>
> We are on Ubuntu 16.04.7 LTS so use apt to install Cassandra, and this now
> gives the following error:
>
> The following packages have unmet dependencies:
>  cassandra : Depends: python3 (>= 3.6) but 3.5.1-3 is to be installed
> E: Unable to correct problems, you have held broken packages.
>
> Looking at the apt packaging the requirement for python has changed from
> 2.7 to 3.6 between beta4 and rc1.
>
> I have found https://issues.apache.org/jira/browse/CASSANDRA-16396 which
> says it needed to be python 3.6, however reading this ticket this seems to
> imply 2.7 is still supported
> https://issues.apache.org/jira/browse/CASSANDRA-15659
>
> Also the code for for cqlsh says it supports 2.7 as well:
> https://github.com/apache/cassandra/blob/b0c50c10dbc443a05662b111a971a65cafa258d5/bin/cqlsh#L65
>
> All our clusters are currently on Ubuntu 16.04 which does not come with
> python 3.6, so this is going to be a major pain to upgrade them to 4.0.
>
> Does the apt packaging really need to specify 3.6 ?
>
> Thanks
>
> Paul Chandler
>