Unable to get managed connection for java:/ENGINEDataSource for RHEV-M

Issue

• Any of the following errors are presented when starting the ovirt-engine service

Failed to add resource root 'jasper-jdt.jar' at path 'jasper-jdt.jar'

[org.ovirt.engine.core.vdsbroker.VdsManager] (QuartzScheduler_Worker-62) Timer update runtimeinfo failed. Exception:: org.springframework.jdbc.CannotGetJdbcConnectionException: Coul
d not get JDBC Connection; nested exception is java.sql.SQLException: javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:/ENGINEDataSource
Caused by: java.net.SocketException: Network is unreachable

• Or, the following errors are present in /var/log/ovirt-engine/server.log:

javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:/ENGINEDataSource
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:390)
        at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:368)
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:464)
        at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:139)