RE: WAS 5.1 Express Connection Pool -- Lives how long???

[NGay@xxxxxxxxxxxxx]

>> Furthermore, you should NEVER,
>> NEVER "kill the server side jobs".
> I know, but I was willing to accept those errors, each app has it's own
> datasource so at least I'd only effect one of the apps, not all of them.

Does your app detect & deal with StaleConnectionExceptions correctly?  We
*had* to write this in (we're on WAS 4.0), otherwise from time to time
users would see these - so I created a special "getConnection" method that
would first get the connection and then run a small test SQL query against
a small table to prove whether or not the connection was stale.  If it was
fine, it would return the connection to the app to be used, if it was
stale, it would throw away the connection and try looping up to 5 times to
try to get a "good" connection.

So with this in place I don't see what the big deal is with killing the
server side jobs?  Its not something we make a habit of but I've always
viewed it as a safe thing to do if necessary, the only danger being that if
one of the jobs was running a query that takes a while and you kill it in
the middle of running the query then the user on the website waiting for
that query would see an error.

Also we're in the process of upgrading to WAS 6.0 - does this handle
StaleConnectionExceptions itself or do we still need our custom code for
dealing with this?  If we do, then I can't find the JAR with the
StaleConnectionException class it in anymore (at least not in WSAD 6.0...
don't have actual WAS 6.0 installed on our iSeries yet).  It used to be in
cm.jar?

Many thanks,

Nigel Gay,
Computer Patent Annuities.




                                                                           
             "Walden H.                                                    
             Leverich"                                                     
             <WaldenL@techsoft                                          To 
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                                                                   Subject 
             23/02/2006 11:26          RE: WAS 5.1 Express Connection Pool 
                                       -- Lives how long???                
                                                                           
             Please respond to                                             
             Java Programming                                              
             on and around the                                             
              iSeries / AS400                                              
             <java400-l@midran                                             
                  ge.com>                                                  
                                                                           
                                                                           




> The changes made to a datasource are not dynamic .....
>they need to stop and start the server to pick them up.

Yuck! Net effect is that I have to bounce the server to add a library to
the list? Yuck. Case in point, I needed to add a library to a data
source yesterday for new functionality in _one_ of several applications
on the server. I have to bounce all the apps on the server to add
functionality to one? Yuck.

>Furthermore, you should NEVER,
>NEVER "kill the server side jobs".

I know, but I was willing to accept those errors, each app has it's own
datasource so at least I'd only effect one of the apps, not all of them.

Does 6.0 have the same limitation? And what's the "best practices" then
for deploying apps? One app server per datasource so if you need to mod
a datasource you don't need to bounce all the unrelated apps?

-Walden

------------
Walden H Leverich III
Tech Software
(516) 627-3800 x3051
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)


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