This is the same problem I am seeing...
Maybe Jason is still on the list and can provide some insight?
----- Original Message -----
From: "Srini" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, December 17, 1999 2:04 AM
Subject: Re: ConnectionPool from Jason Hunters Book
> Yes i too tried the same connection pooling and found for each and every
time it
> has been increased to one.
>
> I have found it were it is increasing. Here is the snippet of code from
Jason
> Hunters Book
>
> <snip>
> synchronized(prh_Connections){
> System.out.println("Entering synchronized block");
> while(key.hasMoreElements()){
> locon_Conn = (Connection)key.nextElement();
> }
> Boolean b = (Boolean)prh_Connections.get(locon_Conn);
> if (b == Boolean.TRUE){
> try{
> String lows_Dbquery = "select * from gen1";
> Statement lostmt_State = locon_Conn.createStatement();
> lostmt_State.executeQuery(lows_Dbquery);
> }
> catch(SQLException sqle){
> locon_Conn = DriverManager.getConnection(prws_Dburl, prws_Usrname,
> prws_Password);
> }
> ***********************************************
> System.out.println("Returning :" + prh_Connections.size());
> prh_Connections.put(locon_Conn, Boolean.FALSE);
> System.out.println("Returning After:" + prh_Connections.size());
> **************************************************
> }
> }
> </snip>
>
> <op>
> Returning :2
> Returning After:3 [Increasing the hashtable by 1 instead it need to
update the
> same connection by a false value to makr that it has been taken]
> </op>
>
> In the above snip the line marked with asterix is updating the hashtable
with a
> false value stating that this connection has been taking. Hashtable is
growing
> by one at this juncture instead it need to update its value. Since it has
been
> increased by 1 it grows beyond a limit at certain stage and maximum number
of
> connection exceeds.
>
> Any workaround??
>
> Thanks
> Srini
>
> RVASUDEV wrote:
>
> > See at <VR>
> >
> > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> > Vasudev Ram
> > Infosys Technologies Limited
> > Pune, India
> > Email : [EMAIL PROTECTED]
> > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> >
> > > -----Original Message-----
> > > From: Hunter Hillegas [SMTP:[EMAIL PROTECTED]]
> > > Sent: Friday, December 17, 1999 11:23 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: ConnectionPool
> > >
> > > Hi!
> > >
> > > I'm using the ConnectionPool example from Jason Hunter's book with my
> > > servlets and a mySQL database on Linux...
> > >
> > > Whenever a query hits the database, it's creating a new connection
(it's
> > > never reusing a connection from the pool)...
> > >
> > > I don't really know the best way to troubleshoot this...
> > >
> > <VR> Open a log file in each of your classes (ConnectionPool,
> > YourServletApp)
> > and write messages to the log file to show the flow of control
> > and variable values.
> > </VR>
> >
> > > The first thing I tried was changing the setup on the ConnectionPool
class
> > > to perform a simple query I know is valid to perform the check on the
> > > Connection object...
> > >
> > > mySQL doesn't support transactions so I didn't know if
> > > con.setAutoCommit(true) would throw an exception (and thus create a
new
> > > connection) or not...
> > >
> > <VR> Write a test program to find out if setAutoCommit throws
> > exceptions.
> > </VR>
> >
> > > It's still creating a new connection every time so I end up with a
VERY
> > > large pool that maxes out the DB...
> > >
> > > Any suggestions?
> > >
> > > Hunter
> > >
> > >
__________________________________________________________________________
> > > _
> > > To unsubscribe, send email to [EMAIL PROTECTED] and include in the
> > > body
> > > of the message "signoff SERVLET-INTEREST".
> > >
> > > Archives: http://archives.java.sun.com/archives/servlet-interest.html
> > > Resources:
http://java.sun.com/products/servlet/external-resources.html
> > > LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
> >
> >
___________________________________________________________________________
> > To unsubscribe, send email to [EMAIL PROTECTED] and include in the
body
> > of the message "signoff SERVLET-INTEREST".
> >
> > Archives: http://archives.java.sun.com/archives/servlet-interest.html
> > Resources: http://java.sun.com/products/servlet/external-resources.html
> > LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
>
>
___________________________________________________________________________
> To unsubscribe, send email to [EMAIL PROTECTED] and include in the
body
> of the message "signoff SERVLET-INTEREST".
>
> Archives: http://archives.java.sun.com/archives/servlet-interest.html
> Resources: http://java.sun.com/products/servlet/external-resources.html
> LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
>
___________________________________________________________________________
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff SERVLET-INTEREST".
Archives: http://archives.java.sun.com/archives/servlet-interest.html
Resources: http://java.sun.com/products/servlet/external-resources.html
LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
