There are errors on http://java.sun.com/products/jndi/tutorial/beyond/names/syntax.html. Not all \ should be escaped.

According to javadoc of CompositeName [1]:

 The JNDI syntax defines the following meta characters:

   * escape (backward slash \),
   * quote characters (single (') and double quotes (")), and
   * component separator (forward slash character (/)).

 Any occurrence of a leading quote, an escape preceding any meta
                                    ****************************
 character, an escape at the end of a component, or a component
 *********
 separator character in an unquoted component must be preceded by
 an escape character when that component is being composed into a
 composite name string.

This means a CN attr of backslash\a should have LDAP name cn=backslash\\a, but its JNDI name should be cn=backslash\\\a. Only the escape itself (the first \) is to be escaped again. The second \, which is in the original content, is not an escape.

[1] http://java.sun.com/javase/6/docs/api/javax/naming/CompositeName.html