multi-digit ycsb versions (0.10.0+) causing 'Unexpected second line' error

Any version i use above 0.9.0 causes 'Unexpected second line', I can comment out the error to have it run successfully, but this may lead to other complications. the error doesn't even print out the 'command_line' variable correctly:

STDERR:
2018-05-15 12:33:15,554 a8736554 MainThread aws_dynamodb_ycsb(1/1) pkb.py:791 ERROR Exception running benchmark
Traceback (most recent call last):
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/pkb.py", line 789, in RunBenchmarkTask
RunBenchmark(spec, collector)
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/pkb.py", line 655, in RunBenchmark
DoRunPhase(spec, collector, detailed_timer)
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/pkb.py", line 535, in DoRunPhase
samples = spec.BenchmarkRun(spec)
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/linux_benchmarks/aws_dynamodb_ycsb_benchmark.py", line 138, in Run
vms, load_kwargs=load_kwargs, run_kwargs=run_kwargs))
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/linux_packages/ycsb.py", line 987, in LoadAndRun
run_samples = self.Run(vms, workloads=workloads, run_kwargs=run_kwargs)
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/linux_packages/ycsb.py", line 965, in Run
**(run_kwargs or {})))
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/linux_packages/ycsb.py", line 881, in RunStaircaseLoads
results = self._RunThreaded(vms, **parameters)
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/linux_packages/ycsb.py", line 823, in _RunThreaded
vm_util.RunThreaded(_Run, range(len(vms)))
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/background_tasks.py", line 624, in RunThreaded
max_concurrency=max_concurrent_threads)
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/background_tasks.py", line 568, in RunParallelThreads
errors.VmUtil.ThreadException)
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/background_tasks.py", line 543, in _RunParallelTasks
'{0}{1}'.format(os.linesep, os.linesep.join(error_strings)))
ThreadException: The following exceptions occurred during parallel execution:
Exception occurred while calling _Run(0):
Traceback (most recent call last):
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/background_tasks.py", line 235, in Run
self.return_value = self.target(*self.args, **self.kwargs)
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/linux_packages/ycsb.py", line 821, in _Run
results.append(self._Run(vm, **params))
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/linux_packages/ycsb.py", line 788, in _Run
return ParseResults(str(stderr + stdout), self.measurement_type)
File "/usr/local/google/home/flint/Documents/test/PerfKitBenchmarker/perfkitbenchmarker/linux_packages/ycsb.py", line 275, in ParseResults
raise IOError('Unexpected second line: {0}'.format(command_line))
IOError: Unexpected second line: