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From Lars Huttar <lars_hut...@sil.org>
Subject Re: c3: null pointer exception in ResponseHeaderCollector.isModifiedResponse
Date Mon, 26 Mar 2012 17:09:11 GMT
On 3/26/2012 11:47 AM, Thorsten Scherler wrote:
> On 03/26/2012 04:49 PM, Francesco Chicchiriccò wrote:
>> ...
>> Despite of this, I can assure that my company and at least a couple of
>> other companies have several production applications based on Cocoon
>> 3.0, so my suggestion would be "keep pushing" ;-)
>
> This said, I should have said much earlier something but the 
> discussion about c3 belongs on the dev list until we have an official 
> release. If you want to keep up with your development I strongly 
> recommend to sync c3 trunk regular.

Ok, thanks for this tip. I will send future questions to the dev list.


> ...
> What does
> <map:generate src="generators/languages-in-country.xml" /> gives you 
> if you add it directly?

For that we get a very similar result:

2012-03-26 12:02:32,052 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.servletservice.DispatcherServlet - DispatcherServlet: 
service servlet=org.apache.cocoon.servlet.XMLSitemapServlet@1e247e2 
mountPath= servletPath= 
pathInfo=/generator/languages-in-country/country_id/77/source
2012-03-26 12:02:32,065 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.servlet.RequestProcessor - Setting the baseURL to 
file:/C:/Users/HuttarL/Documents/work/c3/theParent/e-17-pub/./src/main/resources/COB-INF/
2012-03-26 12:02:32,149 INFO  4650852@qtp-775647-0 
org.apache.cocoon.servlet.RequestProcessor - Performing GET request at 
/generator/languages-in-country/country_id/77/source
2012-03-26 12:02:32,149 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.servlet.RequestProcessor - The base URL for this 
request is 
file:/C:/Users/HuttarL/Documents/work/c3/theParent/e-17-pub/./src/main/resources/COB-INF/
2012-03-26 12:02:32,169 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.sitemap.node.AbstractSitemapNode - 
PipelinesNode.invoke(/generator/languages-in-country/country_id/77/source)
2012-03-26 12:02:32,170 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.sitemap.node.AbstractSitemapNode - 
PipelineNode(caching).invoke(/generator/languages-in-country/country_id/77/source)
2012-03-26 12:02:32,191 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.sitemap.node.AbstractSitemapNode - 
MatchNode.invoke(/generator/languages-in-country/country_id/77/source)
2012-03-26 12:02:32,197 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.sitemap.node.MatchNode$MatcherContext - Matching: 
expression=test.html, 
testValue=generator/languages-in-country/country_id/77/source, result=null
2012-03-26 12:02:32,197 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.sitemap.node.AbstractSitemapNode - 
MatchNode.invoke(/generator/languages-in-country/country_id/77/source)
2012-03-26 12:02:32,197 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.sitemap.node.MatchNode$MatcherContext - Matching: 
expression=generator/languages-in-country/country_id/77/source, 
testValue=generator/languages-in-country/country_id/77/source, 
result={0=generator/languages-in-country/country_id/77/source}
2012-03-26 12:02:32,198 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.sitemap.node.AbstractSitemapNode - 
GenerateNode(src=generators/languages-in-country.xml, 
type=url).invoke(/generator/languages-in-country/country_id/77/source)
2012-03-26 12:02:32,210 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.pipeline.AbstractPipeline - Adding component 
XMLGenerator(hashCode=21679729 
internalGenerator=URLGenerator(hashCode=7501974 
source=file:/C:/Users/HuttarL/Documents/work/c3/theParent/e-17-pub/src/main/resources/COB-INF/generators/languages-in-country.xml))

to pipeline [CachingPipeline(hashCode=3632323 components=[])].
2012-03-26 12:02:32,210 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.sitemap.node.AbstractSitemapNode - 
SerializeNode(type=xml).invoke(/generator/languages-in-country/country_id/77/source)
2012-03-26 12:02:32,320 DEBUG 4650852@qtp-775647-0 
org.apache.cocoon.pipeline.AbstractPipeline - Adding component 
XMLSerializer(hashCode=9852500) to pipeline 
[CachingPipeline(hashCode=3632323 
components=[XMLGenerator(hashCode=21679729 
internalGenerator=URLGenerator(hashCode=7501974 
source=file:/C:/Users/HuttarL/Documents/work/c3/theParent/e-17-pub/src/main/resources/COB-INF/generators/languages-in-country.xml))])].
2012-03-26 12:02:32,321 INFO  4650852@qtp-775647-0 
org.apache.cocoon.servlet.RequestProcessor - Sitemap execution for 
/generator/languages-in-country/country_id/77/source took 171.6865 ms.
2012-03-26 12:02:32,329 ERROR 4650852@qtp-775647-0 
org.apache.cocoon.servlet.XMLSitemapServlet - Cocoon can't process the 
request.
java.lang.NullPointerException: null
     at 
org.apache.cocoon.servlet.collector.ResponseHeaderCollector.isModifiedResponse(ResponseHeaderCollector.java:176)

~[cocoon-servlet-3.0.0-beta-1-SNAPSHOT.jar:3.0.0-beta-1-SNAPSHOT]
     at 
org.apache.cocoon.servlet.RequestProcessor.sendSitemapResponse(RequestProcessor.java:354)

~[cocoon-servlet-3.0.0-beta-1-SNAPSHOT.jar:3.0.0-beta-1-SNAPSHOT]
     at 
org.apache.cocoon.servlet.RequestProcessor.service(RequestProcessor.java:92) 
~[cocoon-servlet-3.0.0-beta-1-SNAPSHOT.jar:3.0.0-beta-1-SNAPSHOT]
     at 
org.apache.cocoon.servlet.XMLSitemapServlet.service(XMLSitemapServlet.java:54) 
~[cocoon-servlet-3.0.0-beta-1-SNAPSHOT.jar:3.0.0-beta-1-SNAPSHOT]
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) 
[servlet-api-2.5-20081211.jar:na]
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
~[na:1.6.0_14]
     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
~[na:1.6.0_14]
     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
~[na:1.6.0_14]
     at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_14]
     at 
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)

[spring-aop-3.1.1.RELEASE.jar:3.1.1.RELEASE]
...
     at 
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 
[jetty-util-6.1.26.jar:6.1.26]



>
> It is really weird since we are talking about
>
>  public static boolean isModifiedResponse() {
>         return (Boolean) collectorDataStore.get(KEY_PIPELINE_EXECUTED);
>     }
>
> So either collectorDataStore is null (what should not since it gets 
> instanced on start) or the result of the get which points to that the 
> pipeline-executed infos got lost.
>
> I never saw this behavior before let us see what the direct use test 
> gives.
>
> salu2
>



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