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Oracle XE: java.sql.SQLException: Io exception: The Network Adapter could not establish the connection

You may get "java.sql.SQLException: Io exception: The Network Adapter could not establish the connection" due to following reasons
1. Number of connection exceeds.
2. The IP address or the system name has been changed.


1. Solution for "Number of connection exceeds"
The maximum number of concurrent connections allowed are 19. Contact the technical team for better advice.

2. Solution for the IP Address or System Name changed
Oracle XE does not allow the IP Address or System Name changes. If you changed the system name or IP address then revert back to the original.

Contact technical team if you need the latest IP address or latest System Name. (In general, for this request we have to first revert to the old IP Address or old System Name , take the backup, Uninstall Oracle XE, change to the new IP address or System name , Install Oracle XE, restore the database, test the HQ Application. )



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