unavailable then it is ``None``.
-The module defines two exceptions:
+The module defines the following exceptions:
+
+.. exception:: ProcessError
+
+ The base class of all :mod:`multiprocessing` exceptions.
+
+.. exception:: BufferTooShort
+
+ Exception raised by :meth:`Connection.recv_bytes_into()` when the supplied
+ buffer object is too small for the message read.
.. exception:: AuthenticationError
- Exception raised when there is an authentication error.
+ Raised when there is an authentication error.
+
+.. exception:: TimeoutError
+
+ Raised by methods with a timeout when the timeout expires.
**Examples**