[Opensource] expresso 5 and tomcat 4.1.12

[David Gil]

Hi mike,

>>hi all,
>>
>>is anyone running expresso 5 with tomcat 4.1.12?
>>
>>I have been testing it and it works fine when only one
>>client is connected,
>>but when you use a stress tool such as Ms Web Stress,
>>and when the test finish some java proceses uses 100% of
>>CPU.
>>
>>any idea? i can reproduce it so if you are interested
>>say to me?.
>>
>>have you plan to migrate to 4.1 it is supposed to be
>>a better tomcat implementation...
>
>We definitely plan on migrating, but we're holding off right now for a 
>couple of reasons:
>
>-Tomcat 4.1 arrived in final stage very late in the test cycle for 
>Expresso 5, so it didn't make sense to jump ship that late in the 
>performance cycle.

good reason.


>-It looks like there's a couple of issues with Taglibs, etc with Tomcat 
>4.1.  We haven't tracked things down yet.
>
>-Tomcat 4.1 requires JDK 1.3 for the shutdown hook stuff.  We haven't 
>officially required JDK 1.3 yet.  [Tomcat 4.0.* will run on JDK 1.2 AFAIK]

i am using expresso with jdk1.4.1, it seems to work ok.


>-I don't have Tomcat 4.1 set up on my machine yet :)

;)

>Now regarding the CPU stressing... can you reproduce this under Tomcat 
>4.0.* ??  I'd like to receive further information.

ok, i cannot reproduce it in tomcat 4.0 (version expresso 5.0 complete bundle).
But here i think that still have problems with connections with ORACLE (i 
have setup
value of maxconns = 30) and i stress this night my app during 12 hours and it
is opening 80 conns (using 100 users and Microsoft stress tool),

with a stress test with tomcat 4.1.12 quite simple (25 users continuisly 
calling the
same controller, that only reads a table and return its values), the 
problem is that
whith this configuration (tomcat 4.1.12, expresso 5.0, jdk1.4.1) when the 
stress
test finish, there cpu is at 100% and the only way is kill tomcat.



regards,
david

>                                         -Mike
>
>
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David Gil Sánchez
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