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java.sql.SQLException: Closed Connection	at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:70)	at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133)	at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:199)	at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:263)	at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:271)	at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:445)	at oracle.jdbc.driver.PhysicalConnection.prepareStatement(PhysicalConnection.java:3127)	at oracle.jdbc.driver.PhysicalConnection.prepareStatement(PhysicalConnection.java:3042)	at sysman.util.jdbc.ConnectionWrapper.prepareStatement(ConnectionWrapper.java:577)	at sysman.emo.util.ValueResolver.getCpuCores(ValueResolver.java:805)