Hi, Here are the maximum information about the error: OS where the class is running: winnt4 with jdk1.3 DB OS: Linux Debian potatoe Postgresql version: 7.0.3 Driver JDBC: included in the source code. Description: ----------- First case (postmaster is running ok): I get the connection with: conn = DriverManager.getConnection("... I do a sleep for 5 seconds I test the code with the isClosed() function. I do a request like "select * from ...." Finally I close the connection. But If I do the following: I get the connection with: conn = DriverManager.getConnection("... I do a sleep for 5 seconds (during while I stop the postmaster) I test the code with the isClosed() function. ---> WHICH RETURN FALSE!!! <----- I do a request like "select * from ...." ---> which generate a SQLException Error <--- Finally I close the connection. ---> which generate a SQLException Error <--- Why the Hell, does the method isclosed() is answering that everything is Ok whereas the postmaster is closed & the next request generate an Error. Thanks in advance for further details. Regards, Oscar FRANCOIS. ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://www.postgresql.org/search.mpl