do catch all exception

server/filter.py

@@ -486,6 +486,10 @@ class FileFilter(Filter):
 			logSys.error("Error opening %s" % filename)
 			logSys.exception(e)
 			return False
+		except OSError, e: # pragma: no cover - Requires implemention error in FileContainer to generate
+			logSys.error("Internal errror in FileContainer open method - please report as a bug to https://github.com/fail2ban/fail2ban/issues")
+			logSys.exception(e)
+			return False
 
 		while True:
 			line = container.readline()