diff --git a/VirtualMachineService/VirtualMachineHandler.py b/VirtualMachineService/VirtualMachineHandler.py
index 5bcb87bf..80e2a217 100644
--- a/VirtualMachineService/VirtualMachineHandler.py
+++ b/VirtualMachineService/VirtualMachineHandler.py
@@ -147,13 +147,14 @@ def __init__(self, config):
                 "floating_ip_network"
             ]
             self.AVAIALABILITY_ZONE = cfg["openstack_connection"]["availability_zone"]
+            # try to initialize forc connection
             try:
                 self.RE_BACKEND_URL = cfg["forc"]["forc_url"]
                 self.FORC_API_KEY = os.environ["FORC_API_KEY"]
                 self.logger.info(msg="Forc-Backend url loaded: {0}".format(self.RE_BACKEND_URL))
             except Exception as e:
                 self.logger.exception(e)
-                self.logger.info("Forc-Backend url not loaded.")
+                self.logger.info("Forc-Backend not loaded.")
                 self.RE_BACKEND_URL = None
                 self.FORC_API_KEY = None
             if self.USE_GATEWAY:
diff --git a/VirtualMachineService/ancon/Playbook.py b/VirtualMachineService/ancon/Playbook.py
index 944f7402..4be47b15 100644
--- a/VirtualMachineService/ancon/Playbook.py
+++ b/VirtualMachineService/ancon/Playbook.py
@@ -16,13 +16,13 @@ class Playbook(object):
     PLAYBOOK_FAILED = "PLAYBOOK_FAILED"
 
     def __init__(self, ip, port, playbooks_information, osi_private_key, public_key, logger, pool):
-        self.redis = redis.Redis(connection_pool=pool)
-        self.yaml_exec = ruamel.yaml.YAML()
-        self.vars_files = []
-        self.tasks = []
+        self.redis = redis.Redis(connection_pool=pool)  # redis connection
+        self.yaml_exec = ruamel.yaml.YAML()  # yaml writer/reader
+        self.vars_files = []  # _vars_file.yml to read
+        self.tasks = []  # task list
         self.always_tasks = []
         self.logger = logger
-        self.process = None
+        self.process = None  # init process, returncode, standard output, standard error output
         self.returncode = -1
         self.stdout = ""
         self.stderr = ""