甲骨文有时会关闭JDBC连接吗？

Question

I'm using JDBC to connect to oracle and im not explicitly closing JDBC connection, but after running my application for few days, i see that SQL statements are failing with "java.sql.SQLException: Closed Connection".

What could be the possible reasons for that, i'm sure that i'm not closing it by calling java.sql.Connection.close() method.

Answer 1

but after running my application for few days

Oracle may close the connection after some idle time or a proxy somewhere between your app and Oracle. Best way to keep connections alive is to maintain a heartbeat link. Most databases provide a validation query which is "SELECT 1" or something else.

If you use a pooling mechanism, it is just a configuration. Otherwise you have to do it manually your own.

java.sql.Connection.isValid(timeout)

If not, refresh the connection