Oracle Fusion Middleware Reference for Oracle Directory Server
Enterprise Edition  Responding to the Failure of a Data Source
When Directory Proxy Server detects an error on a connection,
the proxy closes the connection and tries to reestablish the
connection immediately. If the proxy can reestablish the
connection, it considers the data source to be up and running.
If the proxy cannot reestablish the connection, it flags the
data source as unavailable. Directory Proxy Server stops
distributing requests to the data source and closes all other
connections to the data source.  If a request fails because of a
failed connection or a failed data source, Directory Proxy
Server replays the request over another connection to the same
data source or replays the request to another data source. If
the request is replayed to another data source, the load
balancing algorithm determines which data source is used.  If
there are no data sources to which Directory Proxy Server can
replay the request, the proxy returns an err