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From Thorsten Scherler <thorsten.scherler....@juntadeandalucia.es>
Subject Re: Concurrency testing of the locationmap throws errors
Date Mon, 30 Jun 2008 11:46:28 GMT
On Thu, 2008-01-31 at 15:16 -0500, Tim Williams wrote:
> On Jan 31, 2008 1:19 PM, Thorsten Scherler
> <thorsten.scherler.ext@juntadeandalucia.es> wrote:
> > Hi all,
> >
> > I am ATM testing the dispatcher with jmeter and concurrent user.
> >
> > The problem that I encounter is that the locationmap is throwing an
> > error as soon as there are concurrent user. :(
> >
> > I have no clue ATM why that is happening but try
> > <map:match pattern="test">
> >  <map:generate src="lm://transform.html.document"/>
> > <map:serialize  />
> > </map:match>
> >
> > with e.g. 10 user at the same time (Ramp-up time 0) and after you
> > freshly started forrest with skins or dispatcher. You will see 80%
> > failure with "Could not resolve locationmap".
> >
> > I am quite doomed ATM since I had to finish my project yesterday and
> > after the last jmeter tests I cannot hand in the code.
> >
> > Please if you have any idea what the problem can be let us now.
> >
> > TIA
> 
> What are the errors? Stacktrace, etc?

2008-06-30 13:32:33.455::WARN:  /servicios.html
org.apache.cocoon.ProcessingException: Error during resolving of
'lm://resolve.structurer.servicios'.
	at <map:serialize type="xhtml"> -
file:///home/thorsten/src/sadesi/portalv4/trunk/portal/target/work/blocks/dispatcher/sitemap.xmap:65:38
	at <map:transform> -
file:///home/thorsten/src/sadesi/portalv4/trunk/portal/target/work/blocks/dispatcher/sitemap.xmap:64:70
	at <map:transform> -
file:///home/thorsten/src/sadesi/portalv4/trunk/portal/target/work/blocks/dispatcher/sitemap.xmap:63:55
	at <map:transform type="dispatcher"> -
file:///home/thorsten/src/sadesi/portalv4/trunk/portal/target/work/blocks/dispatcher/sitemap.xmap:56:42
....

Caused by: org.apache.excalibur.source.SourceException: Could not
resolve locationmap location.
	at
org.apache.forrest.locationmap.source.impl.LocationmapSourceFactory.getSource(LocationmapSourceFactory.java:81)
	at
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
	at
org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
	at
org.apache.cocoon.template.script.DefaultScriptManager.resolveTemplate(DefaultScriptManager.java:97)


Doing some testing in my case I use jmeter with 250 threads and 100 loop
where the ramp-up time is 20. 

This provokes that the input module is requested on the startup with
more then one request. It seems that the requests are issued as fast
that the module seems to fail to finish to load the first time the
locationmap.

If I however request FIRST (before the jmeter test) a page and let the
locationmap module load with time the tests will not fail anymore.

I am ATM playing around and it happens in
LocationMapModule.getLocationMap() but I am not sure how I can prevent
it.

salu2
-- 
Thorsten Scherler                                 thorsten.at.apache.org
Open Source Java                      consulting, training and solutions


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