gracefully handle dovecot errors

diff --git a/python.d/dovecot.chart.py b/python.d/dovecot.chart.py
index 1fbc471cb1a8abebd771e6cb5d7206b5cdc5a1e9..60e8bf6ef7fcc84f8e5e163d111d05ffd04aedae 100644 (file)
--- a/python.d/dovecot.chart.py
+++ b/python.d/dovecot.chart.py
@@ -110,6 +110,10 @@ class Service(SocketService):
         except (ValueError, AttributeError):
             return None
 
+        if raw is None:
+            self.debug("dovecot returned no data")
+            return None
+
         data = raw.split('\n')[:2]
         desc = data[0].split('\t')
         vals = data[1].split('\t')