One reason this can occur is the target for the database connector is wrong. Check the /hekimian/CenterOpGateway/GraniteWebPortal/log/GraniteWebPortalDebug.log* files for messages similar to this:
Fri Sep 06 01:02:03 EDT 2013 [1] ERROR occurred in doWork Fri Sep 06 01:02:03 EDT 2013 [1] java.sql.SQLException: Io exception: The Network Adapter could not establish the connection java.sql.SQLException: Io exception: The Network Adapter could not establish the connection at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255) at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387) at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:420) at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165) at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801) at java.sql.DriverManager.getConnection(DriverManager.java:525) at java.sql.DriverManager.getConnection(DriverManager.java:193) at com.spirentcom.ciras.util.InventoryDB.doQuery(InventoryDB.java:158) at com.spirentcom.ciras.util.InventoryDB.getDeletedCircuits(InventoryDB.java:99) at com.spirentcom.ciras.util.InventoryDB.getDeletedCircuits(InventoryDB.java:94) at com.spirentcom.ciras.inventory.BulkUpdateManager.addInventoryDailyDelete(BulkUpdateManager.java:349) at com.spirentcom.ciras.adaptors.inbound.InventoryDailyDeleteAdaptor.doAction(InventoryDailyDeleteAdaptor.java:20) at com.spirentcom.ciras.adaptors.inbound.DailyUpdateAdaptor.doWork(DailyUpdateAdaptor.java:35) at com.spirentcom.wegs.process.InboundAdaptorThread.run(InboundAdaptorThread.java:37) at java.lang.Thread.run(Thread.java:595)
or:
Fri Sep 06 02:01:55 EDT 2013 [1] ERROR occurred in doWork Fri Sep 06 02:01:55 EDT 2013 [1] java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
To resolve update file /hekimian/CenterOpGateway/GraniteWebPortal/config.txt. Set INVENTORY_JDBC_URL to the correct setting and restart the Gateway.