I've just upgraded Ovirt3.6 to 4.0.2 and I can't get the dashboard to work. The dashboard page displays this error: Could not fetch dashboard data. Please ensure that data warehouse is properly installed and configured. Running on CentOS 7.2 PostgreSQL server 9.5.4 (remote) I see these errors being generated in engine.log when I try to display the dash board ERROR [org.ovirt.engine.ui.frontend.server.dashboard.DashboardDataServlet] (default task-6) [] Unable to retrieve dashboard data: org.ovirt.engine.ui.frontend.server.dashboard.DashboardDataException: Error while running SQL query at org.ovirt.engine.ui.frontend.server.dashboard.dao.BaseDao.runQuery(BaseDao.java:60) [frontend.jar:] at org.ovirt.engine.ui.frontend.server.dashboard.dao.HostDwhDao.getTotalCpuMemCount(HostDwhDao.java:78) [frontend.jar:] ... Caused by: javax.resource.ResourceException: IJ031083: Wrong driver class [org.postgresql.Driver] for this connection URL [None] at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:321) ... 66 more Google returned some hints that it's probably the postgresql java version, I did have 9.4.xxx installed bu have since downgraded to postgresql-jdbc-9.2.1002-5 I checked the class path generated by dwh-classpath.sh which seems to be using the correct JDBC driver. # /usr/share/ovirt-engine-dwh/bin/dwh-classpath.sh run :/usr/share/java/dom4j.jar:/usr/share/java/apache-commons-collections.jar:/usr/share/java/postgresql-jdbc.jar # rpm -qf /usr/share/java/postgresql-jdbc.jar postgresql-jdbc-9.2.1002-5.el7.noarch Any suggestions on what to try next?