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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