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From Donald Ball <ba...@webslingerZ.com>
Subject Re: Strange JServ/Cocoon behaviour (memory leak?)
Date Sat, 20 May 2000 20:28:49 GMT
Switch to a better JVM. JDK-1.1.7a for Linux is notoriously unstable under
heavy load. Many people IBM's JDK-1.1.8; many others like Blackdown
1.2.2rc4 with Inprise's javacomp JIT.

- donald

On Sat, 20 May 2000, Matthias Brunner wrote:

> I have a quite memory-intensive XSP which parses 8 500K XML files with
> the Xerces DOMParser (just for testing purposes, will switch to SAX
> later) and extracts a specified tag.
> 
> In about 40% of the cases I get an internal server error and the
> following mod_jserv.log:
> 
> (EMERGENCY) ajp12[1]: cannot scan servlet headers  (500)
> (ERROR) an error returned handling request via protocol "ajpv12"
> (EMERGENCY) ajp12: ping: no reply (-1) Please make sure that the
> wrapper.classpath is pointing   to the correct version of
> ApacheJServ.jar
> 
> 
> Trying to access a less-memory-intensive script can provoke the same
> message (DOM Parsing a 50K file) but not so often.
> 
> 
> I just increased the JVM memory to 64M yesterday due to Cocoon's "out of
> memory" messages.
> BTW: Other Cocoon tasks seem to work well.
> 
> Anyone out there with a little help or the same problems?
> 
> 
> My system:
> AMD K6 350Mhz, 128 MB RAM
> 
> SuSE Linux 6.4
> Kernel 2.2.15
> JDK 1.1.7b / JSDK 2.0
> Apache 1.3.9 / JServ 1.1 / Cocoon 1.7.4
> 
> $ps auxw:
> USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
> wwwrun     597  0.8  2.3 71772 3040 ?        S    21:28   0:07
> /usr/lib/jdk1.1.7/bin/../bin/i586/green_threads/java_ns -mx64m ...
> 
> $free -t:
>              total       used       free     shared    buffers    
> cached
> Mem:        128544      98132      30412      39596      13152     
> 40020
> -/+ buffers/cache:      44960      83584
> Swap:       136512       5288     131224
> Total:      265056     103420     161636
> 
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