Problem: In an environment with Relay Server and Sybase Unwired Platform, Relay Server runs for a while and then crashes and requires a restart.
Explanation: Relay Server does not support IIS application pooling. This is documented in System Administration > Relay Server Clusters > Creating a New Relay Server Cluster > Enabling Application Request Routing for IIS Relay Server Hosts > Configuring the Relay Server IIS Host for Load Balancing.
Solution: Check the Relay Server log for a message similar to the following: 'Redundant outbound enabler connection for backend server 'S0' in backend farm 'farm' was ignored.'
Also, check the Windows System Event Viewer for a warning on the Application Pool of the Relay Server.
Turn off application pooling for RelayServer in IIS, and stop and restart IIS.