diff --git a/cluster_parameter_sweep.py b/cluster_parameter_sweep.py
index 389f980..3fb7ec5 100644
--- a/cluster_parameter_sweep.py
+++ b/cluster_parameter_sweep.py
@@ -39,13 +39,6 @@ def run_async(self, mapper=None, aggregator=None, reducer=None, number_of_trajec
                   store_realizations=True, add_realizations=False, realizations_storage_directory=None):
         """ Creates a new remote_job and deploys it on the cluster. Returns RemoteJob deployed. """
 
-        # Verify that given parameters are not referenced from other modules, as that produces referenced cloudpickling.
-        calling_module = inspect.getmodule(inspect.stack()[1][0])
-        logging.info("Caller module: {0}".format(calling_module))
-        # calling_module_name = calling_module.__name__ if calling_module is not None else None
-        # ClusterParameterSweep.check_ingredients_to_be_pickled(self.model_cls, mapper, aggregator, reducer,
-        #                                                      module_name=calling_module_name)
-
         # Create new remote job.
         job_id = create_new_id()
 
@@ -132,12 +125,19 @@ def clean_up(self, remote_job):
 
     def get_results(self, remote_job, add_realizations=False):
         import time
+        import paramiko
+
         while True:
             try:
                 results = self.get_sweep_result(remote_job, add_realizations=add_realizations)
                 if add_realizations is False:
                     self.clean_up(remote_job)
                 return results
+            except paramiko.SSHException as e:
+                logging.error(e)
+                logging.info("Backing off... will try to connect to {0}@{1} again in {2} minutes."
+                             .format(remote_job.remote_host.username, remote_job.remote_host.ip_address, constants.BACK_OFF_TIME / 60))
+                time.sleep(constants.BACK_OFF_TIME)
             except cluster_execution_exceptions.RemoteJobNotFinished:
                 time.sleep(1)
 
diff --git a/constants.py b/constants.py
index e6ec917..ee5f6bc 100644
--- a/constants.py
+++ b/constants.py
@@ -16,3 +16,4 @@
 RemoteJobRunning = 0
 RemoteJobCompleted = 1
 RemoteJobFailed = 2
+BACK_OFF_TIME = 30 * 60