RESOLUTION
If $CATALINA_HOME/psa-users/DOMAIN.COM.xml doesn't exist you should create it.Firstly, get manager's login and password for the domain:
mysql -uadmin -p`cat /etc/psa/.psa.shadow ` -D psa -e 'select p.parameter,p.value from Parameters p, DomainServices ds, domains d where p.id=ds.parameters_id and ds.type="tomcat" and ds.dom_id=d.id and d.name="DOMAIN_NAME";'
+----------------+----------------------------------+
| parameter | value |
+----------------+----------------------------------+
| manager_login | 3030435a3bce1dff91a1a98d6f6be993 |
| manager_passwd | d59a93a6a8ebd4b90421ff0fe47e76df |
+----------------+----------------------------------+ Then use these values to create the file.
export PSA_PASSWORD="d59a93a6a8ebd4b90421ff0fe47e76df"
$PRODUCT_ROOT_D/admin/sbin/tomcatmng --install-service --vhost-name="DOMAIN_NAME" --manager-login="3030435a3bce1dff91a1a98d6f6be993" Restart tomcat.
Keywords: tomcat, Memory database, cannot be read