We had memory loss with 5.0.19. We profiled a 5.0.19 web app and found that memory was 
not being garbage collected too well. As soon as we upgraded this went away and was 
proven by th profiling. Start by trying out 5.0.27 and see how it goes. If it still 
happens then take Yoav's advice and profile you app using the (now freeware and 
excellent) JProbe (www.quest.com) and go from there.

ADC

> -----Original Message-----
> From: Matt He [mailto:[EMAIL PROTECTED]
> Sent: 05 August 2004 15:43
> To: Tomcat Users List
> Subject: java.lang.OutOfMemoryError
> 
> 
> 
> Hi,
> 
> We upgraded our Tomcat server from 3.0 to 5.1.19 about two 
> months ago (linux
> machine). Since then it frequently crashed (twice a week). It 
> seems like the
> crash was caused a web crawler. This web crawler generate 
> many threads and
> quickly drained server memory. The log file showed
> java.lang.OutOfMemoryError. When we use Tomcat 3, this 
> crawler didn't cause
> this problem.
> 
> 
> Does anyone have any suggestion on how to solve this problem 
> (we don't want
> to block this crawler)?
> 
> 
> Thanks.
> 
> 
> Matt
> 
> 
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