Cassandra_YCSB 0.9.0 is failing

I am running cassandra against YCSB, and I have two different machines, one acting as the server and running Ubuntu 18.10, while client where YCSB will be installed is running Ubuntu 16.04.

I run default version of YCSB_cassandra i.e. 0.9.0, with static config file. Here is the command
$ ./pkb.py --benchmarks=cassandra_ycsb --benchmark_config_file=/home/anupn/baremetal-static.yaml --num_vms=1 --cassandra_replication_factor=1 --ycsb_client_vms=1

It fails on downloading the YCSB 0.9.0.tar, but if I try downloading it outside the process it gets downloaded quickly. I am copying my .yaml file as well as log file

[pkb.log](https://github.com/GoogleCloudPlatform/PerfKitBenchmarker/files/2651267/pkb.log)
[baremetal-static.txt](https://github.com/GoogleCloudPlatform/PerfKitBenchmarker/files/2651268/baremetal-static.txt)

I waited for more than 15 minutes, and then killed it. With the same setup if I run MongoDB with YCSB it is able to run the test properly. I looked at the code, and it looks the way server and clients are prepared in MongoDB is exactly same as in Cassandra. Pointers would be really appreciated.