[jira] [Created] (CASSANDRA-18030) Few nodes in cassandra 3.11 cluster is unable to connect to v4 protocol version

["sainath vadyala (Jira)" <ji...@apache.org>]

sainath vadyala created CASSANDRA-18030:
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             Summary: Few nodes in cassandra 3.11 cluster is unable to connect to v4 protocol version
                 Key: CASSANDRA-18030
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18030
             Project: Cassandra
          Issue Type: Bug
            Reporter: sainath vadyala


We have a Apache Cassandra cluster with 36 nodes running on k8s, cqlsh client was installed in a separate namespace. cqlsh is downgrading version from v4 to v3 on some of the nodes but we have a case where all the nodes need to connect to v4, this is a requirement to set UNSET for avoiding null values to be converted to tombstones (only v4 is supported). 
{code:java}
cqlsh 10.1.2.3 --ssl --protocol-version=3
Connected to production at 10.1.2.3:9042.
[cqlsh 5.0.1 | Cassandra 3.11.5 | CQL spec 3.4.4 | Native protocol v3]
Use HELP for help. 
cqlsh>

cqlsh 10.1.2.3 --ssl --protocol-version=4
Connection error: ('Unable to connect to any servers', {'10.1.2.3': DriverException('ProtocolError returned from server while using explicitly set client protocol_version 4',)})  {code}



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