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From Michael Hartle <>
Subject Re: Tomcat/Cocoon on Linux woes
Date Sun, 17 Mar 2002 13:24:24 GMT
Matthew Langham wrote:

>What we have found is that reducing the number of file handles will cause
>the hang to happen sooner. This however may be a separate thing and have
>nothing to do with the original problem. Of course if file handles are being
>leaked somewhere then we would still need to find out where that problem is
>coming from.
>We are using Sun JDK 1.3.1, Tomcat 3.3.
Which versions of SuSE Linux did you try ?

We have a test development & presentation system up and running using 
SuSE Linux 7.2 Professional, Suns JDK 1.4.0 and Tomcat 4.0.1 that shows 
no such issues. When we tested several different configurations, we 
found that Suns JDK 1.3.1 would not run properly, but segfault often on 
our system (P4 1,5Ghz/512MB); switching to Blackdowns JDK 1.3.1 solved 
this issue completely.

Then we found that the JDK1.3.1 still suffers from many VM-slowing or 
-killing bugs like a network/garbage-collector issue ("many parallel 
connections" definitely ring a bell here), a multithreading JPEG encoder 
bug and others. After switching to Suns JDK 1.4.0, these bugs seem to 
have disappeared and we are quite confident regarding the stability of 
the system.

Best regards,

Michael Hartle,
Hartle & Klug GbR

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