Datasource pool are not recovered

Sometimes in our environment, weblogic lose the connection with the database for any reason:
- the network between weblogic server and data base server have some crash
- the data base is out
Most of the times, as soon as the connection is reestablished, the data source connections of the pool become available again. We have the properties 'test Frequency' and 'Test Table Name' setted.
But, in some cases not yet identified, the datasource pool keeps unavailable. The datasource isn't recovered even if it is restarted. The only solution is to restart weblogic server (version 10.3.2).
This happen in production and development environment. Unfortunately we couldn't map all variables that make this happen in order to reproduce it.
Does anybody have faced the same problem? Any hint?
Thanks. Mauro.

You could try setting the property Test Connections On Reserve on the connection pool. Now the connection will be tested
before it is given to the client.
Also the Test Frequency property can be used to test unused connections if they are still valid. By default this is set to 120
seconds.

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