Tor, can you tell me what version of IDE is causing you this ? Even
better, can you attach the ide.log from the last IDE session ? Thanks.

This is from a fresh CVS build (I did a cvs bringover this morning
9pm PDT and did a clean followed by a build. I have up to date
extra binaries).

Here's my log:
-------------------------------------------------------------------------------
>Log Session: Tuesday, November 6, 2001 9:35:00 AM PST
>System Info: 
  Product Version       = NetBeans IDE, Development Version (Build
200111060827)
  IDE Versioning        = IDE/1 spec=1.43 impl=200111060827
  Operating System      = SunOS version 5.8 running on sparc
  Java; VM; Vendor      = 1.3.1_01; Java HotSpot(TM) Client VM
1.3.1_01; Sun Microsystems Inc.
  Java Home             = /local/jvm/j2sdk1_3_1_01/jre
  System Locale         = en
  Home Dir; Current Dir = /home/tor; /local/ws/demo_ws
  IDE Install; User Dir = /local/ide/cvs/nbbuild/netbeans;
/home/tor/nbuser30
  CLASSPATH             =
/local/ide/cvs/nbbuild/netbeans/lib/patches/openide-compat.jar:/local/ide/cvs/nbbuild/netbeans/lib/core.jar:/local/ide/cvs/nbbuild/netbeans/lib/openide.jar:/local/ide/cvs/nbbuild/netbeans/lib/ext/crimson.jar:/local/ide/cvs/nbbuild/netbeans/lib/ext/jh.jar:/local/ide/cvs/nbbuild/netbeans/lib/ext/regexp.jar:/local/ide/cvs/nbbuild/netbeans/lib/ext/rmi-ext.jar:/local/ide/cvs/nbbuild/netbeans/lib/ext/terminalemulator.jar:/local/ide/cvs/nbbuild/netbeans/lib/ext/xerces.jar:/local/jvm/current/lib/dt.jar:/local/jvm/current/lib/htmlconverter.jar:/local/jvm/current/lib/tools.jar
-------------------------------------------------------------------------------
Existing modules:
	Ant [org.apache.tools.ant.module/2 2.7 200111060827]
	Applet [org.netbeans.modules.applet/1 1.7 200111060827]
	Auto Update [org.netbeans.modules.autoupdate/1 1.7 200111060827]
	Bean Patterns [org.netbeans.modules.beans/1 1.7 200111060827]
	Built-in CVS Client [org.netbeans.modules.cvsclient/1 1.4 200111060827]
	C, C++ and Fortran Editor Support [org.netbeans.modules.cpp.editor/1
1.0 ${buildnumber}]
	CVS Command-Line Client Support Converter
[org.netbeans.modules.vcs.cmdline.compat/1 1.0 200111060827]
	Editor [org.netbeans.modules.editor/1 1.8 200111060827]
	Editor Chooser [org.netbeans.modules.externaleditor.editorchooser/1 1.0
200110021120]
	External Editor Support [org.netbeans.modules.externaleditor 0.5
200110161106]
	External HTML Browser [org.netbeans.modules.extbrowser/1 0.3 200111060827]
	Form Editor [org.netbeans.modules.form/2 1.7 200111060827]
	Forte Developer C/C++/Fortran Support [com.sun.forte.developer.ipe/1
0.5 Forte Developer 7 C/C++/Fortran Support 1.0 Preview1 2001/11/06]
	Forte Developer C/C++/Fortran Support [org.netbeans.modules.cpp/1 1.0
200111060848]
	General Online Help [org.netbeans.modules.usersguide/1 1.8 200111060827]
	HTML [org.netbeans.modules.html/1 1.8 200111060827]
	HTTP Server [org.netbeans.modules.httpserver/1 1.7 200111060827]
	IDE Core [org.netbeans.core/1 1.1]
	Image [org.netbeans.modules.image/1 1.7 200111060827]
	Internationalization [org.netbeans.modules.i18n/1 1.9 200111060827]
	Internationalization of Form [org.netbeans.modules.i18n.form/2 1.8
200111060827]
	JAR Packager [org.netbeans.modules.jarpackager/2 1.9 200111060827]
	JNDI [org.netbeans.modules.jndi/1 1.4 200111060827]
	JPDA Debugger [org.netbeans.modules.debugger.jpda/1 1.9 200111060827]
	JSP Syntax Coloring [org.netbeans.modules.web.core.syntax/1 1.5
200111060827]
	JSP/Servlet [org.netbeans.modules.web.core/1 1.5 200111060827]
	Java Source Files [org.netbeans.modules.java/1 1.7 200111060827]
	Javadoc [org.netbeans.modules.javadoc/1 1.7 200111060827]
	New Module Wizard [org.netbeans.modules.apisupport.lite/1 0.2 200111060827]
	Projects [org.netbeans.modules.projects/1 1.7 200111060827]
	RMI [org.netbeans.modules.rmi/1 1.4 200111060827]
	Resource Bundle Syntax Coloring
[org.netbeans.modules.properties.syntax/1 1.7 200111060827]
	Resource Bundles [org.netbeans.modules.properties/1 1.7 200111060827]
	Scripting Support [org.netbeans.modules.scripting/1 1.4 200111060827]
	Sourceless Java Classes [org.netbeans.modules.clazz/1 1.8 200111060827]
	Text [org.netbeans.modules.text/1 1.7 200111060827]
	Tomcat 3.2 Server [org.netbeans.modules.web.tomcat/1 1.3 200111060827]
	Tools Debugger [org.netbeans.modules.debugger.debug/1 1.9 200111060827]
	User Utilities [org.netbeans.modules.utilities/1 1.7 200111060827]
	VCS Generic Command-Line Support [org.netbeans.modules.vcs.advanced/1
1.5 200111060827]
setDebug: false
*********** Exception occurred ************
Tue Nov 06 09:36:24 PST 2001: java.lang.ClassNotFoundException:
DTD_JavadocLibrary
java.lang.ClassNotFoundException: DTD_JavadocLibrary
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at org.openide.execution.NbClassLoader.findClass(NbClassLoader.java:151)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
	at org.openide.loaders.InstanceSupport.findClass(InstanceSupport.java:537)
	at
org.openide.loaders.InstanceSupport.instanceClass(InstanceSupport.java:131)
	at
org.openide.loaders.InstanceDataObject$Ser.instanceClass(InstanceDataObject.java:852)
	at org.openide.loaders.InstanceSupport.instanceOf(InstanceSupport.java:164)
	at
org.openide.loaders.InstanceDataObject$Ser.instanceOf(InstanceDataObject.java:879)
	at
org.openide.loaders.InstanceDataObject.instanceOf(InstanceDataObject.java:524)
[catch] at
org.openide.loaders.InstanceDataObject.createNodeDelegate(InstanceDataObject.java:434)
	at
org.openide.loaders.DataObject$PrimaryFileListener.run(DataObject.java:1051)
	at org.openide.util.Mutex.readAccess(Mutex.java:241)
	at org.openide.loaders.DataObject.getNodeDelegate(DataObject.java:246)
	at org.openide.loaders.DataNode$2.run(DataNode.java:490)
	at org.openide.util.Task.run(Task.java:152)
	at
org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:622)
*********** Exception occurred ************
Tue Nov 06 09:36:33 PST 2001: java.lang.ClassNotFoundException:
DTD_JavaLibrary
java.lang.ClassNotFoundException: DTD_JavaLibrary
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at org.openide.execution.NbClassLoader.findClass(NbClassLoader.java:151)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
	at org.openide.loaders.InstanceSupport.findClass(InstanceSupport.java:537)
	at
org.openide.loaders.InstanceSupport.instanceClass(InstanceSupport.java:131)
	at
org.openide.loaders.InstanceDataObject$Ser.instanceClass(InstanceDataObject.java:852)
	at org.openide.loaders.InstanceSupport.instanceOf(InstanceSupport.java:164)
	at
org.openide.loaders.InstanceDataObject$Ser.instanceOf(InstanceDataObject.java:879)
	at
org.openide.loaders.InstanceDataObject.instanceOf(InstanceDataObject.java:524)
[catch] at
org.openide.loaders.InstanceDataObject.createNodeDelegate(InstanceDataObject.java:434)
	at
org.openide.loaders.DataObject$PrimaryFileListener.run(DataObject.java:1051)
	at org.openide.util.Mutex.readAccess(Mutex.java:241)
	at org.openide.loaders.DataObject.getNodeDelegate(DataObject.java:246)
	at org.openide.loaders.DataNode$2.run(DataNode.java:490)
	at org.openide.util.Task.run(Task.java:152)
	at
org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:622)

Note by the way that the javadoc library warning is because my
layer file contains a Javadoc mount (as described in the e-mail
referenced earlier in this bug report) - however, the javalibrary
warning occurs even if I remove my own javadoc mount.

Created attachment 3301 [details]
Exceptions from Javadoc and Editor module

I don't understand, why this is P2 issue.

Tor, to answer your questions:
1. AFAIK DTD header is not mandatory 
2. XML files are not validated

I was under the impressions that exceptions thrown at startup
are really bad, that's why I filed it as a P2 bug. 

If we -don't- validate the XML files, why is it looking at the
DTD file at all???  That still seems like a bad thing to do
for performance reasons. It shouldn't care about the DTD at all
- it shouldn't have to exist! The fact that it's reading it means
we're doing unnecessary work. Since XML files are all over NetBeans,
this seems like a significant thing to look into for performance
work.

Who can I talk to about the javadoc problem (the directory not
getting mounted) ?  Should I just file a bug?

exception fixed in trunk for java, javadoc, editor modules

The exception is thrown only with your C, C++ and Fortran Editor
Support installed. So it only affect few people and AFAIK does not
affect functionality of IDE.  I don't know why this exception occurs
only with your module. 
It does not look for DTD file at all. How do you came to this
concussion? 
For your javadoc problem, see issue #17355 - now you should get more
information, why your directory was not mounted.

Oops, I promised to comment on this issue :-( sorry, Tomas.
The assumption that the exception comes from XML processing is wrong
:-) The parser the IDE uses is really non-validating. What happened
is, that somehow a setting for "show files extensions" in system
settings was touched (maybe it was just read from the disk) The setter
locates all live DataObjects, grabs their nodes - and tries to update
their appearance.
BUT there was an error in the XML layer - instanceCreate attribute was
there, which allowed to create instance of DTD_JavaLibrary handler,
but instanceClass attribute, which would yield type of the
to-be-created object was not there. In that case, InstanceDataObject
derives the desired class name from the filename.
And that's it. We've added the instanceClass attribute.

V

Resolved for 3.4.x or earlier, no new info since then -> closing.