diff --git a/src/master/httprest.py b/src/master/httprest.py
index 615c021..90a12e4 100755
--- a/src/master/httprest.py
+++ b/src/master/httprest.py
@@ -737,7 +737,15 @@ def add_job(user,beans,form):
     for key in job_data:
         key_arr = key.split('_')
         value = job_data[key]
-        if key_arr[0] != 'dependency' and value == '':
+        if key_arr[0] == 'srcAddr' and value == '':
+            task_idx = 'task_' + key_arr[1]
+            if task_idx in job_info['tasks']:
+                job_info['tasks'][task_idx]['srcAddr'] = '/root/nfs'
+            else:
+                job_info['tasks'][task_idx] = {
+                    'srcAddr': '/root/nfs/'
+                }
+        elif key_arr[0] != 'dependency'and value == '':
             message['success'] = 'false'
             message['message'] = 'value of %s is null' % key
         elif len(key_arr) == 1:
@@ -973,11 +981,6 @@ if __name__ == '__main__':
     G_networkmgr.printpools()
 
     G_cloudmgr = cloudmgr.CloudMgr()
-    '''G_taskmgr = taskmgr.TaskMgr()
-    G_jobmgr = jobmgr.JobMgr(taskmgr)
-    G_jobmgr.start()
-    G_taskmgr.set_jobmgr(G_jobmgr)
-    G_taskmgr.start()'''
 
     # start NodeMgr and NodeMgr will wait for all nodes to start ...
     G_nodemgr = nodemgr.NodeMgr(G_networkmgr, etcdclient, addr = ipaddr, mode=mode)
diff --git a/src/master/jobmgr.py b/src/master/jobmgr.py
index 6808110..31c0b4c 100644
--- a/src/master/jobmgr.py
+++ b/src/master/jobmgr.py
@@ -15,6 +15,7 @@ class BatchJob(object):
         self.create_time = time.strftime('%Y-%m-%d %H:%M:%S',time.localtime())
         self.top_sort()
 
+    # transfer the dependency graph into a job queue
     def top_sort(self):
         logger.debug('top sorting')
         tasks = self.raw_job_info["tasks"]
@@ -74,13 +75,11 @@ class JobMgr(threading.Thread):
         self.job_map = {}
         self.taskmgr = taskmgr
 
-
     def run(self):
         while True:
             self.job_scheduler()
             time.sleep(2)
 
-
     # user: username
     # job_data: a json string
     # user submit a new job, add this job to queue and database
@@ -116,7 +115,7 @@ class JobMgr(threading.Thread):
 
     # user: username
     # jobid: the id of job
-    # get the information of a job, including the status, json description and other informationa
+    # get the information of a job, including the status, json description and other information
     # call get_task to get the task information
     def get_job(self, user, job_id):
         pass
diff --git a/src/master/taskmgr.py b/src/master/taskmgr.py
index d439f70..beaaf95 100644
--- a/src/master/taskmgr.py
+++ b/src/master/taskmgr.py
@@ -113,7 +113,7 @@ class TaskMgr(threading.Thread):
             if instance['try_count'] > task.info.maxRetryCount:
                 self.check_task_completed(task)
         elif report.instanceStatus == OUTPUTERROR:
-            task_failed(task)
+            self.task_failed(task)
 
 
     def check_task_completed(self, task):
@@ -326,4 +326,4 @@ class TaskMgr(threading.Thread):
             if task.info.id == taskid:
                 return task
         return None
-        
\ No newline at end of file
+