exception catch for bad volta initialization

volta/core/core.py

@@ -270,8 +270,12 @@ def end_test(self):
         logger.info('Finishing test...')
         if 'volta' in self.enabled_modules:
             self.volta.end_test()
-            self.process_currents.close()
-            self.process_currents.join()
+            try:
+                self.process_currents.close()
+            except AttributeError:
+                logger.warn('Core has no process currents thread. Seems like VoltaBox initialization failed')
+            else:
+                self.process_currents.join()
         if 'phone' in self.enabled_modules:
             self.phone.end()
             if self.events_parser:

volta/providers/boxes/box_binary.py

@@ -106,8 +106,12 @@ def end_test(self):
         except AttributeError:
             logger.warn('VoltaBox has no Reader. Seems like VoltaBox initialization failed')
             logger.debug('VoltaBox has no Reader. Seems like VoltaBox initialization failed', exc_info=True)
-        self.pipeline.close()
-        self.pipeline.join(10)
+        try:
+            self.pipeline.close()
+        except AttributeError:
+            logger.warn('VoltaBox has no Pipeline. Seems like VoltaBox initialization failed')
+        else:
+            self.pipeline.join(10)
         self.data_source.close()
 
     def get_info(self):
@@ -156,6 +160,7 @@ def start_test(self, results):
         self.pipeline.start()
         logger.debug('Waiting grabber thread finish...')
 
+
 class BoxBinaryReader(object):
     """
     Read chunks from source, convert and return numpy.array