HADB may be created and running, but if the persistence store has not yet been created, the Application Server will not be able to communicate with the HADB. This situation is accompanied by the following message:
WARNING (7715): ConnectionUtilgetConnectionsFromPool failed using connection URL: connection URL
Create the session store in the HADB with a command like the following:
asadmin create-session-store --storeurl connection URL --storeuser haadmin --storepassword hapasswd --dbsystempassword super123