Traceback (most recent call last): File "/usr/local/bin/cqlsh", line 129, in from cassandra.cluster import Cluster File "/usr/local/lib/python2.7/site-packages/cassandra/cluster.py", line 24, in from concurrent.futures import ThreadPoolExecutor, FIRST_COMPLETED, wait as wait_futures ImportError: No module named concurrent.futures Traceback (most recent call last): File "/usr/local/bin/cqlsh", line 129, in from cassandra.cluster import Cluster File "/usr/local/lib/python2.7/site-packages/cassandra/cluster.py", line 24, in from concurrent.futures import ThreadPoolExecutor, FIRST_COMPLETED, wait as wait_futures ImportError: No module named concurrent.futures

Issue can be resolved by setting the version of pyhon cassandra-driver to 3.25.0