Hi,
we have three nodes cluster with KS defined as 

CREATE KEYSPACE someks WITH REPLICATION = { 'class' : 
'org.apache.cassandra.locator.NetworkTopologyStrategy', 'some-dc': '3' } AND 
DURABLE_WRITES = true;

next I read with Pyhton (cassandra-driver 3.11) from Cassandra 3.11.3 and get 
error 

Error from server: code=1200 [Coordinator node timed out waiting for replica 
nodes' responses] message="Operation timed out - received only 2 responses." 
info={'received_responses': 2, 'required_responses': 3, 'consistency': 'ALL'}
nor session.default_consistency_level = ConsistencyLevel.QUORUM neither 
query = SimpleStatement("SELECT **********", 
consistency_level=ConsistencyLevel.QUORUM)
rows = session.execute(query)

helps. What it could be?

Thanks in advance.

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