diff --git a/services/univention-ad-connector/umc/python/adconnector/__init__.py b/services/univention-ad-connector/umc/python/adconnector/__init__.py
index 0127042..7b80b85 100644
--- a/services/univention-ad-connector/umc/python/adconnector/__init__.py
+++ b/services/univention-ad-connector/umc/python/adconnector/__init__.py
@@ -330,7 +330,10 @@ def __update_status(self):
 
 	def __is_process_running( self, command ):
 		for proc in psutil.process_iter():
-			cmdline =  proc.cmdline() if callable(proc.cmdline) else proc.cmdline
+			try:
+				cmdline =  proc.cmdline() if callable(proc.cmdline) else proc.cmdline
+			except psutil.NoSuchProcess:
+				continue
 			if cmdline and fnmatch.fnmatch(' '.join(cmdline), command):
 				return True
 		return False