custom_cluster/test_breakpad.py:271: in test_minidump_cleanup_thread
assert self.wait_for_num_processes('impalad', cluster_size) == cluster_size
custom_cluster/test_breakpad.py:116: in wait_for_num_processes
num_processes = self.get_num_processes(daemon)
custom_cluster/test_breakpad.py:101: in get_num_processes
self.cluster.refresh()
common/impala_cluster.py:53: in refresh
self.__build_impala_process_lists()
common/impala_cluster.py:113: in __build_impala_process_lists
impalads.append(ImpaladProcess(process.cmdline))
common/impala_cluster.py:208: in __init__
super(ImpaladProcess, self).__init__(cmd, socket.gethostname())
common/impala_cluster.py:189: in __init__
super(BaseImpalaProcess, self).__init__(cmd)
common/impala_cluster.py:134: in __init__
'Process object must be created with valid command line argument list'
E AssertionError: Process object must be created with valid command line argument list