[backend] Avoid double processing

beat/web/backend/models.py

@@ -453,6 +453,8 @@ class Worker(models.Model):
 
                 # if we get to this point, then we launch the user process
                 subprocess.Popen(cmdline + [execute, str(split.pk)])
+                split.status = Job.PROCESSING #avoids re-running
+                split.save()
 
         # cleans-up zombie processes that may linger
         _cleanup_zombies()