In an installation scenario where the Communications Express and Access Manager are installed and configured on separate nodes, the Web Server installed on the node containing the Communications Express throws a Java exception on restart. This is due to the incorrect settings in the Web Server's classpath (on the node where Communications Express is installed).
Edit the web_svr_base/config/server.xml file on the Web Server instance of the node where Communications Express is installed, and ensure that the following entries are available in the Web Server's classpath:
opt/SUNWam/lib:/opt/SUNWam/locale:/etc/opt/SUNWam/config: /opt/SUNWam/lib/am_sdk.jar:/opt/SUNWam/lib/am_services.jar: /opt/SUNWam/lib/am_logging.jar