Yes, I checked both the tomcat log (I’ve configured tomcat to use log4j) as 
well as my application logs.

Yes, 20 httpd prefork processes.

I don’t think it’s memory related, I have an 8GB heap and tomcat averages 5GB 
usage and peeks around 6.5 before garbage collection kicks in.

Cheers,
Ian


On April 15, 2014 at 3:57:04 PM, Christopher Schultz 
(ch...@christopherschultz.net) wrote:

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Ian,  

On 4/15/14, 3:33 PM, Ian Long wrote:  
> Thanks for the reply.  
>  
> It looks to me like tomcat just gave up partway through generating  
> the request, I’m trying to figure out why.  
>  
> There are no exceptions in either my application logs or the tomcat  
> log itself, which is frustrating.  

Definitely. You checked catalina.out (or wherever stdout goes) as well  
as your application's logs?  

> Thanks, I’ll look into the executor.  
>  
> Apache matches what is set in my connector:  
>  
> <IfModule prefork.c> StartServers 8 MinSpareServers 5  
> MaxSpareServers 20 ServerLimit 800 MaxClients 800  
> MaxRequestsPerChild 0 </IfModule>  
>  
> Yes, the connector settings should be fine, there are usually less  
> than 20 httpds.  

You mean 20 httpd prefork processes, right? That should be fine: it  
means you will need 20 connections available in Tomcat.  

> Forgot to mention that it looks like tomcat returned around 50% of  
> what the page should have been, before it hit the Internal Server  
> Error.  

Have you run out of memory or anything like that?  

- -chris  
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