| Cannot run help from eclipse [message #29904] |
Fri, 04 March 2005 15:25  |
Eclipse User |
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Originally posted by: billferrett.blueyonder.co.uk
I'm not exactly a newbie but I have always had problems running eclipse
"Help Contents". I am currently running 3.1.M5b but it has been the
same story since 2.x. A window opens, title
"http://127.0.0.1/help/index.jsp" but it is empty. There do not appear
to be any errors in the org.eclipse.tomcat log.
If I try "http://127.0.0.1" from a browser I get "Internal Application
Server" (so it must have been started) then I am redirected to an empty
index.jsp page.
If I try "http://127.0.0.1/help/about.html" I get the about.hmtl from
"eclipse/plugins/org.eclipse.help.webapp_3.0.0".
So it looks like html files are served ok but the problem is jsp's.
When I try "http://127.0.0.1/help/index.jsp" from a browser I get the
following errors:
StandardWrapper[/help:org.eclipse.help.internal.webapp.jsp.b asic.index_jsp]:
Marking servlet org.eclipse.help.internal.webapp.jsp.basic.index_jsp as
unavailable
StandardWrapperValve[org.eclipse.help.internal.webapp.jsp.ba sic.index_jsp]:
Allocate exception for servlet
org.eclipse.help.internal.webapp.jsp.basic.index_jsp
javax.servlet.ServletException: Error instantiating servlet class
org.eclipse.help.internal.webapp.jsp.basic.index_jsp
..
..
..
java.lang.LinkageError: loader constraints violated when linking
javax/servlet/http/HttpServletResponse class
I have removed all versions of servlet.jar except that in
eclipse\plugins\org.eclipse.tomcat_4.1.30 as I suspected there could be
duplicate classes on the classpath. I don't have a CLASSPATH envar.
Finally, if I put an index.jsp file in
eclipse\plugins\org.eclipse.tomcat_4.1.30\webapps\ROOT and try
"http:\\127.0.0.1\index.jsp" I get an Error 500 and the log contains:
Error compiling file:
E:\Projects\Eclipse\.metadata\.plugins\org.eclipse.tomcat\RO OT\/index_jsp.java
[javac] Compiling 1 source file
[javac]
E:\Projects\Eclipse\.metadata\.plugins\org.eclipse.tomcat\RO OT\index_jsp.java:3:
package javax.servlet does not exist
[javac] import javax.servlet.*;
..
..
..
Info: Compile:
javaFileName=E:\Projects\Eclipse\.metadata\.plugins\org.ecli pse.tomcat\ROOT\/index_jsp.java
classpath=null
cp=null
work
dir=E:\Projects\Eclipse\.metadata\.plugins\org.eclipse.tomca t\ROOT
srcDir=E:\Projects\Eclipse\.metadata\.plugins\org.eclipse.to mcat\ROOT
include=index_jsp.java
Exception compiling Compile failed; see the compiler error output for
details.
Exception:
Compile failed; see the compiler error output for details.
at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:938)
So it seems that Eclipse still knows how to handle jsp's but the
classpath is empty.
How can I find out what the classpath is used when "Help Content" fails?
All of this is straight out of the box so to speak. I unzipped the
install file, started it up and got these results. After a day trying
to fathom it out I'm still stumped. The main reason for persevering is
that I want to set up an Info Center for an app I'm developing and need
to understand how the help component works.
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| Re: Cannot run help from eclipse [message #29909 is a reply to message #29904] |
Fri, 04 March 2005 21:27  |
| Eclipse User |
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What is in your java extensions folder? On Mac OS X, there is a place to
put jars that one wants to use (I think on Linux this will be in some bin
folder). I found that if I put log4j.jar into my classpath, help stopped
working in Eclipse. No idea why but when I took it out, Help worked
flawlessly.
On 3/4/05 1:25 PM, in article d0ag7j$8ib$1@www.eclipse.org, "Bill Ferrett"
<billferrett@blueyonder.co.uk> wrote:
> I'm not exactly a newbie but I have always had problems running eclipse
> "Help Contents". I am currently running 3.1.M5b but it has been the
> same story since 2.x. A window opens, title
> "http://127.0.0.1/help/index.jsp" but it is empty. There do not appear
> to be any errors in the org.eclipse.tomcat log.
>
> If I try "http://127.0.0.1" from a browser I get "Internal Application
> Server" (so it must have been started) then I am redirected to an empty
> index.jsp page.
>
> If I try "http://127.0.0.1/help/about.html" I get the about.hmtl from
> "eclipse/plugins/org.eclipse.help.webapp_3.0.0".
>
> So it looks like html files are served ok but the problem is jsp's.
>
> When I try "http://127.0.0.1/help/index.jsp" from a browser I get the
> following errors:
>
> StandardWrapper[/help:org.eclipse.help.internal.webapp.jsp.b asic.index_jsp]:
> Marking servlet org.eclipse.help.internal.webapp.jsp.basic.index_jsp as
> unavailable
> StandardWrapperValve[org.eclipse.help.internal.webapp.jsp.ba sic.index_jsp]:
> Allocate exception for servlet
> org.eclipse.help.internal.webapp.jsp.basic.index_jsp
> javax.servlet.ServletException: Error instantiating servlet class
> org.eclipse.help.internal.webapp.jsp.basic.index_jsp
> .
>
> .
>
> .
>
> java.lang.LinkageError: loader constraints violated when linking
> javax/servlet/http/HttpServletResponse class
>
> I have removed all versions of servlet.jar except that in
> eclipse\plugins\org.eclipse.tomcat_4.1.30 as I suspected there could be
> duplicate classes on the classpath. I don't have a CLASSPATH envar.
>
> Finally, if I put an index.jsp file in
> eclipse\plugins\org.eclipse.tomcat_4.1.30\webapps\ROOT and try
> "http:\\127.0.0.1\index.jsp" I get an Error 500 and the log contains:
>
> Error compiling file:
> E:\Projects\Eclipse\.metadata\.plugins\org.eclipse.tomcat\RO OT\/index_jsp.java
> [javac] Compiling 1 source file
> [javac]
> E:\Projects\Eclipse\.metadata\.plugins\org.eclipse.tomcat\RO OT\index_jsp.java:
> 3:
> package javax.servlet does not exist
> [javac] import javax.servlet.*;
> .
>
> .
>
> .
>
> Info: Compile:
> javaFileName=E:\Projects\Eclipse\.metadata\.plugins\org.ecli pse.tomcat\ROOT\/i
> ndex_jsp.java
> classpath=null
> cp=null
> work
> dir=E:\Projects\Eclipse\.metadata\.plugins\org.eclipse.tomca t\ROOT
> srcDir=E:\Projects\Eclipse\.metadata\.plugins\org.eclipse.to mcat\ROOT
> include=index_jsp.java
> Exception compiling Compile failed; see the compiler error output for
> details.
>
> Exception:
> Compile failed; see the compiler error output for details.
> at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:938)
>
> So it seems that Eclipse still knows how to handle jsp's but the
> classpath is empty.
>
> How can I find out what the classpath is used when "Help Content" fails?
>
> All of this is straight out of the box so to speak. I unzipped the
> install file, started it up and got these results. After a day trying
> to fathom it out I'm still stumped. The main reason for persevering is
> that I want to set up an Info Center for an app I'm developing and need
> to understand how the help component works.
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