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Posted to users@cocoon.apache.org by Dave Xiao <re...@hushmail.com> on 2004/05/13 15:28:10 UTC
UnnamedSelector: ComponentSelector Attempted to retrieve component with null hint
Hi all,
I'm new to cocoon. When I composed my first cocoon example, I met with
a problem. Below is the details.
I've successfully installed cocoon 2.1.4 on my machine (win2000 professional)
with jdk 1.4.2_03. Note this version doesn't interact with tomcat as
previous ones. Instead, it uses jetty as http server. Anyway, the installation
is ok. I can access cocoon page at http://localhost:8888.
Then I go to C:\cocoon-2.1.4\build\webapp (here is where the cocoon application
lies, I assume) and replace the default sitemap.xmap with the below one(In
fact, this is from a tutorial, but it's for cocoon 2.0).
<?xml version="1.0" encoding="UTF-8"?>
<map:sitemap xmlns:map="http://apache.org/cocoon/sitemap/1.0">
<map:components>
<map:generators default="file">
<map:generator name="file" src="org.apache.cocoon.generation.FileGenerator"/>
</map:generators>
<map:transformers default="xslt">
<map:transformer name="xslt" src="org.apache.cocoon.transformation.TraxTransformer"/>
</map:transformers>
<map:readers default="resource">
<map:reader name="resource" src="org.apache.cocoon.reading.ResourceReader"/>
</map:readers>
<map:serializers default="html">
<map:serializer name="xml" mime-type="text/xml" src="org.apache.cocoon.serialization.XMLSerializer"/>
<map:serializer name="html" mime-type="text/html" src="org.apache.cocoon.serialization.HTMLSerializer"/>
<map:serializer name="svg2png" src="org.apache.cocoon.serialization.SVGSerializer"
mime-type="image/jpeg"/>
<map:serializer name="fo2pdf" src="org.apache.cocoon.serialization.FOPSerializer"
mime-type="application/pdf"/>
</map:serializers>
<map:matchers default="wildcard">
<map:matcher name="wildcard" src="org.apache.cocoon.matching.WildcardURIMatcher"/>
</map:matchers>
</map:components>
<map:pipelines>
<map:pipeline>
<map:match pattern="index.html">
<map:read src="index.html" mime-type="text/html"/>
</map:match>
</map:pipeline>
</map:pipelines>
</map:sitemap>
After that, I copy a html file named index.html to the same folder as
sitemap.xmap. Then I started cocoon type http://localhost:8888. Unfortunately
an error showed up as below.
Internal Server Error
Message: UnnamedSelector: ComponentSelector Attempted to retrieve component
with null hint.
Description: org.apache.avalon.framework.component.ComponentException:
UnnamedSelector: ComponentSelector Attempted to retrieve component with
null hint.
Sender: org.apache.cocoon.servlet.CocoonServlet
Source: Cocoon Servlet
Request URI
index.html
cause
org.apache.avalon.framework.component.ComponentException: UnnamedSelector:
ComponentSelector Attempted to retrieve component with null hint.
request-uri
/index.html
stacktrace
org.apache.avalon.framework.component.ComponentException: UnnamedSelector:
ComponentSelector Attempted to retrieve component with null hint.
at org.apache.avalon.excalibur.component.ExcaliburComponentSelector.select(ExcaliburComponentSelector.java:227)
at org.apache.cocoon.components.ExtendedComponentSelector.select(ExtendedComponentSelector.java:296)
at org.apache.cocoon.components.treeprocessor.InvokeContext.getProcessingPipeline(InvokeContext.java:191)
at org.apache.cocoon.components.treeprocessor.sitemap.ReadNode.invoke(ReadNode.java:103)
at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:84)
at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:165)
at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:107)
at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:162)
at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:107)
at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:136)
at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:371)
at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:312)
at org.apache.cocoon.Cocoon.process(Cocoon.java:656)
at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1112)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:356)
at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:294)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1776)
at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:514)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1726)
at org.mortbay.http.HttpServer.service(HttpServer.java:879)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:790)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:952)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:807)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:196)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:487)
Apache Cocoon 2.1.4
I don't know where the mistake is. Can anybody help?
Thanks,
Dave
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Re: UnnamedSelector: ComponentSelector Attempted to retrieve component
with null hint
Posted by Joerg Heinicke <jo...@gmx.de>.
<map:pipes> section seems to be missing. This has been added in 2.1 (or
better said moved from cocoon.xconf in 2.0 to sitemap.xmap in 2.1).
http://cocoon.apache.org/2.1/installing/updating.html#Pipelines+configuration+in+the+sitemap
Using 2.1.5 that will be released tomorrow you will get a better error
message.
Joerg
On 13.05.2004 15:28, Dave Xiao wrote:
> Hi all,
>
> I'm new to cocoon. When I composed my first cocoon example, I met with
> a problem. Below is the details.
>
> I've successfully installed cocoon 2.1.4 on my machine (win2000 professional)
> with jdk 1.4.2_03. Note this version doesn't interact with tomcat as
> previous ones. Instead, it uses jetty as http server. Anyway, the installation
> is ok. I can access cocoon page at http://localhost:8888.
>
> Then I go to C:\cocoon-2.1.4\build\webapp (here is where the cocoon application
> lies, I assume) and replace the default sitemap.xmap with the below one(In
> fact, this is from a tutorial, but it's for cocoon 2.0).
>
> <?xml version="1.0" encoding="UTF-8"?>
> <map:sitemap xmlns:map="http://apache.org/cocoon/sitemap/1.0">
> <map:components>
> <map:generators default="file">
> <map:generator name="file" src="org.apache.cocoon.generation.FileGenerator"/>
> </map:generators>
> <map:transformers default="xslt">
> <map:transformer name="xslt" src="org.apache.cocoon.transformation.TraxTransformer"/>
> </map:transformers>
> <map:readers default="resource">
> <map:reader name="resource" src="org.apache.cocoon.reading.ResourceReader"/>
> </map:readers>
> <map:serializers default="html">
> <map:serializer name="xml" mime-type="text/xml" src="org.apache.cocoon.serialization.XMLSerializer"/>
> <map:serializer name="html" mime-type="text/html" src="org.apache.cocoon.serialization.HTMLSerializer"/>
> <map:serializer name="svg2png" src="org.apache.cocoon.serialization.SVGSerializer"
> mime-type="image/jpeg"/>
> <map:serializer name="fo2pdf" src="org.apache.cocoon.serialization.FOPSerializer"
> mime-type="application/pdf"/>
> </map:serializers>
> <map:matchers default="wildcard">
> <map:matcher name="wildcard" src="org.apache.cocoon.matching.WildcardURIMatcher"/>
> </map:matchers>
> </map:components>
> <map:pipelines>
> <map:pipeline>
> <map:match pattern="index.html">
> <map:read src="index.html" mime-type="text/html"/>
> </map:match>
> </map:pipeline>
> </map:pipelines>
> </map:sitemap>
>
> After that, I copy a html file named index.html to the same folder as
> sitemap.xmap. Then I started cocoon type http://localhost:8888. Unfortunately
> an error showed up as below.
>
> Internal Server Error
> Message: UnnamedSelector: ComponentSelector Attempted to retrieve component
> with null hint.
>
> Description: org.apache.avalon.framework.component.ComponentException:
> UnnamedSelector: ComponentSelector Attempted to retrieve component with
> null hint.
>
> Sender: org.apache.cocoon.servlet.CocoonServlet
>
> Source: Cocoon Servlet
>
> Request URI
>
> index.html
>
> cause
>
> org.apache.avalon.framework.component.ComponentException: UnnamedSelector:
> ComponentSelector Attempted to retrieve component with null hint.
>
> request-uri
>
> /index.html
>
> stacktrace
>
> org.apache.avalon.framework.component.ComponentException: UnnamedSelector:
> ComponentSelector Attempted to retrieve component with null hint.
> at org.apache.avalon.excalibur.component.ExcaliburComponentSelector.select(ExcaliburComponentSelector.java:227)
> at org.apache.cocoon.components.ExtendedComponentSelector.select(ExtendedComponentSelector.java:296)
> at org.apache.cocoon.components.treeprocessor.InvokeContext.getProcessingPipeline(InvokeContext.java:191)
> at org.apache.cocoon.components.treeprocessor.sitemap.ReadNode.invoke(ReadNode.java:103)
> at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:84)
> at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:165)
> at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:107)
> at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:162)
> at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:107)
> at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:136)
> at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:371)
> at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:312)
> at org.apache.cocoon.Cocoon.process(Cocoon.java:656)
> at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1112)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:356)
> at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:294)
> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
> at org.mortbay.http.HttpContext.handle(HttpContext.java:1776)
> at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:514)
> at org.mortbay.http.HttpContext.handle(HttpContext.java:1726)
> at org.mortbay.http.HttpServer.service(HttpServer.java:879)
> at org.mortbay.http.HttpConnection.service(HttpConnection.java:790)
> at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:952)
> at org.mortbay.http.HttpConnection.handle(HttpConnection.java:807)
> at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:196)
> at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289)
> at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:487)
>
>
> Apache Cocoon 2.1.4
>
>
>
> I don't know where the mistake is. Can anybody help?
>
>
>
> Thanks,
>
> Dave
>
>
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> To unsubscribe, e-mail: users-unsubscribe@cocoon.apache.org
> For additional commands, e-mail: users-help@cocoon.apache.org
>
>
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