diff -r b49e366556ba Lib/urllib/request.py
--- a/Lib/urllib/request.py	Mon Jun 02 14:43:24 2014 +0200
+++ b/Lib/urllib/request.py	Tue Jun 03 11:54:11 2014 +0300
@@ -2251,8 +2251,12 @@
         import ftplib
         self.busy = 0
         self.ftp = ftplib.FTP()
-        self.ftp.connect(self.host, self.port, self.timeout)
-        self.ftp.login(self.user, self.passwd)
+        try:
+            self.ftp.connect(self.host, self.port, self.timeout)
+            self.ftp.login(self.user, self.passwd)
+        except ftplib.Error:
+            self.ftp.close()
+            raise
         _target = '/'.join(self.dirs)
         self.ftp.cwd(_target)