Oracle : java exception

Hi,

Just want to report the following error :

17 Dec 2008 21:23:47:450 java.lang.NumberFormatException: empty String
17 Dec 2008 21:23:47:450 at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)
17 Dec 2008 21:23:47:450 at java.lang.Double.parseDouble(Unknown Source)
17 Dec 2008 21:23:47:450 at com.adventnet.appmanager.server.oracle.datacollection.OracleMonitoring.getCollectedData(OracleMonitoring.java:1055)
17 Dec 2008 21:23:47:450 at com.adventnet.nms.applnfw.datacollection.server.PerformDataCollection.run(PerformDataCollection.java:88)
17 Dec 2008 21:23:47:450 at com.adventnet.management.scheduler.WorkerThread.run(WorkerThread.java:68)

Regards,

--
Ali