diff -r f768a3529ee7 -r a9e12b7cc207 mytoolkit/mymanager.py
--- a/mytoolkit/mymanager.py	Mon Nov 21 10:47:24 2011 +0100
+++ b/mytoolkit/mymanager.py	Fri Nov 25 18:17:27 2011 +0100
@@ -67,13 +67,12 @@
 
 The row returned by fetchone_dict() is special dict object, which can be accessed
 using item or attribute access, that is row['now'] or row.now.
+
 """
 
 from contextlib import contextmanager
 import logging
 import threading
-import select
-import socket
 
 import MySQLdb
 import MySQLdb.cursors
@@ -199,7 +198,10 @@
             conn = None
             while len(self.conn_pool[name]) and conn is None:
                 conn = self.conn_pool[name].pop()
-                if conn.closed:
+                try:
+                    conn.ping()
+                except MySQLdb.MySQLError:
+                    conn.close()
                     conn = None
 
             if conn is None:
@@ -226,7 +228,11 @@
                 return
 
             # connection returned to the pool must not be in transaction
-            conn.rollback()
+            try:
+                conn.rollback()
+            except OperationalError:
+                conn.close()
+                return
 
             self.conn_pool[name].append(conn)
         finally:
@@ -253,7 +259,7 @@
         conn = MySQLdb.connect(cursorclass=Cursor, **ci.parameters)
         if not ci.isolation_level is None:
             if ci.isolation_level == 'AUTOCOMMIT':
-                conn.autocommit()
+                conn.autocommit(True)
             else:
                 curs = conn.cursor()
                 curs.execute('SET SESSION TRANSACTION ISOLATION LEVEL ' + ci.isolation_level)