importance of closing the connection object

[lusha tak]

Hello all!
is it true that not closing connection,statement & resultset objects in my servlets & jsp pages can be a reason for slow performance.if yes, please explain why???
secondly, if i use these statements in my jsp/servlets ,sometimes i get errors such as resultset is already closed etc..(my application is hosted on tomcat server)
and please also explain the reason for getting "file not found(404)" error in case such as...

if(some condition==true)
{
conn.close();//here conn is connection object
response.sendRedirect("/my_proj/another_file.jsp");
}

whereas this code runs fine..

if(some condition==true)
response.sendRedirect("/my_proj/another_file.jsp");

[This message has been edited by lusha tak (edited September 24, 2001).]
[This message has been edited by lusha tak (edited September 24, 2001).]

[lusha tak]

Please have a look at the above stated problem of mine...
thanks
Lusha