Correction: The error below is only if the java file is executed from
the wrong directory. When executed from the correct directory, the same
error from before happens:
java.lang.NoClassDefFoundError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at oracle.ide.IdeCore.class$(IdeCore.java:89)
at oracle.ide.IdeCore.startupImpl(IdeCore.java:775)
at oracle.ide.Ide.startup(Ide.java:539)
at oracle.jdeveloper.JDeveloper.launch(JDeveloper.java:58)
at oracle.jdeveloper.JDeveloper.main(JDeveloper.java:37)
Cyrus Adkisson wrote:
Well, there are about 200 jar files in the jdev installation
directory, so the shotgun approach isn't very appealing. I don't see
any kind of log files anywhere, either... I was able to do one thing,
which was print out the actual java command (which is HUGE) with an
echo in the jdev launch script. Cutting and pasting it, I was able to
get more descriptive NoClassDefFoundError output:
Exception in thread "main" java.lang.NoClassDefFoundError:
oracle/jdeveloper/JDeveloper
I'm probably an idiot for not knowing right away what the problem is
now. I know that java can't find the correct jar file containing the
JDeveloper class, but how do I know where that is?
jdevinstalldir/jdev/lib/jdev.jar has already been inserted into the
classpath... what now?
Cyrus
Cortezzo, Jason wrote:
Usually, a NoClassDefFoundError will have a message, which specifies the
missing class, before the stack trace like...
Exception in thread "main" java.lang.NoClassDefFoundError:
com/somepackage/SomeClass
Without it, it's a lot harder to figure out what is missing. Does Jdev
have a log file that you could look at to try to find out which class is
missing? Otherwise, you can try a shotgun approach. Locate all your jar
files in your Jdev installation (find /jdevinstalldir -name *.jar)
and make
sure that they are all in your classpath.
Check the script that starts the IDE and see if it is setting a
classpath.
Sometimes the CP is set using a command line option of the java command
(i.e. something like: java -cp {classpath} com.oracle.IDEStartup). Make
sure all the jar files that the script expects to find actually exist.
The Eclipse error message is a little more descriptive. It's looking
for a
native library (as opposed to a Java class file) and it's telling you
exactly which one it is looking for
"/usr/local/eclipse/plugins/org.eclipse.swt.gtk64_3.0.1/os/linux/amd64/libsw
t-pi-gtk-3063.so"
-Jason
-----Original Message-----
From: fedora-list-bounces@xxxxxxxxxx
[mailto:fedora-list-bounces@xxxxxxxxxx]
On Behalf Of Cyrus Adkisson
Sent: Monday, November 15, 2004 1:22 PM
To: For users of Fedora Core releases
Subject: Re: NoClassDefFoundError after upgrade to FC3
Thanks for the reply. That's the whole error as far as jdev is
concerned.
When I try to run eclipse I get the following error, which may or may
not be
related:
java.lang.UnsatisfiedLinkError:
/usr/local/eclipse/plugins/org.eclipse.swt.gtk64_3.0.1/os/linux/amd64/libswt
-pi-gtk-3063.so:
/usr/local/eclipse/plugins/org.eclipse.swt.gtk64_3.0.1/os/linux/amd64/libswt
-pi-gtk-3063.so: cannot open shared object file: No such file or
directory
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1586)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1495)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:834)
at org.eclipse.swt.internal.Library.loadLibrary(Library.java:100)
at org.eclipse.swt.internal.gtk.OS.<clinit>(OS.java:19)
at
org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:63)
at
org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:54)
at org.eclipse.swt.widgets.Display.<clinit>(Display.java:118)
at
org.eclipse.ui.internal.Workbench.createDisplay(Workbench.java:268)
at org.eclipse.ui.PlatformUI.createDisplay(PlatformUI.java:153)
at
org.eclipse.ui.internal.ide.IDEApplication.createDisplay(IDEApplication.java
:122)
at
org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:72)
at
org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.
java:335)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.eclipse.core.launcher.Main.basicRun(Main.java:185)
at org.eclipse.core.launcher.Main.run(Main.java:704)
at org.eclipse.core.launcher.Main.main(Main.java:688)
Also, I just upgraded my java rpm (and set JAVA_HOME to the new
location),
so I know all the files are there. It must be a jar file that isn't
in the
classpath. What jar files would normally be in the CLASSPATH?
Cyrus
Cortezzo, Jason wrote:
Are you giving us the entire exception message? It should tell you
which class it is looking for. I think it usually prints right
before the stack trace.
A NoClassDefFoundError means either a .jar file is missing or your
CLASSPATH enviornment no longer contains the necessary file.
-Jason
-----Original Message-----
From: fedora-list-bounces@xxxxxxxxxx
[mailto:fedora-list-bounces@xxxxxxxxxx]
On Behalf Of Cyrus Adkisson
Sent: Monday, November 15, 2004 1:10 PM
To: For users of Fedora Core releases
Subject: Re: NoClassDefFoundError after upgrade to FC3
Well, I uncovered one big clue. Whenever you upgrade to FC3, the
system attempts to install gcc-java (and does) which can screw up
the workings of your Sun java considerably. Among other things, FC3
installs a /usr/bin/java script that points to the gcc-java code so
when you type java -version it gives you a bunch of gcc output. If
you disable the /usr/bin/java script, then it will revert back to
the Sun java.
However, doing that did not fix my problem. Jdeveloper still gives
the same error I posted previously, as if it's searching for
something in the classpath. Eclipse does something similar. Can
anyone help me understand what I might need in the classpath for
this to work again?
Cyrus
Cyrus Adkisson wrote:
Hi everybody. I use jDeveloper from Oracle to program, create GUIs
and manage my various projects. It's not open-source, but it's a
very good program. I have been using it without errors for at least
a year.
Then, when I upgraded to Fedora Core 3, it was the only thing on my
computer that stopped working. When I click on the icon on my
desktop, nothing pops up, and top shows a massive load on the CPU
for "jdev".
When I run it in a terminal window, I get the following error:
java.lang.NoClassDefFoundError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at oracle.ide.IdeCore.class$(IdeCore.java:89)
at oracle.ide.IdeCore.startupImpl(IdeCore.java:775)
at oracle.ide.Ide.startup(Ide.java:539)
at oracle.jdeveloper.JDeveloper.launch(JDeveloper.java:58)
at oracle.jdeveloper.JDeveloper.main(JDeveloper.java:37)
I've got the same java SDK I had before, and the configuration
files are pointing to it. Can anybody think of why an upgrade to
Fedora Core
3 would be causing this error?
Thanks,
Cyrus
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__________________
Cyrus Adkisson
RooseveltMedia.com
1833 New Hampshire Avenue NW
Washington, DC 20009
(202)465-4359
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