TestBlacklist.test_kill_impalad_with_running_queries fails on centos6

custom_cluster/test_blacklist.py:165: in test_kill_impalad_with_running_queries
    result = self.execute_query("select count(*) from tpch.lineitem")
common/impala_test_suite.py:830: in wrapper
    return function(*args, **kwargs)
common/impala_test_suite.py:862: in execute_query
    return self.__execute_query(self.client, query, query_options)
common/impala_test_suite.py:933: in __execute_query
    return impalad_client.execute(query, user=user)
common/impala_connection.py:205: in execute
    return self.__beeswax_client.execute(sql_stmt, user=user)
beeswax/impala_beeswax.py:187: in execute
    handle = self.__execute_query(query_string.strip(), user=user)
beeswax/impala_beeswax.py:365: in __execute_query
    self.wait_for_finished(handle)
beeswax/impala_beeswax.py:386: in wait_for_finished
    raise ImpalaBeeswaxException("Query aborted:" + error_log, None)
E   ImpalaBeeswaxException: ImpalaBeeswaxException:
E    Query aborted:ExecQueryFInstances rpc query_id=e345f4c3ec44fa89:5fb7f40f00000000 failed: Exec() rpc failed: Network error: Client connection negotiation failed: client connection to 127.0.0.1:27002: connect: Connection refused (error 111)