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Home » Eclipse Projects » Rich Client Platform (RCP) » RCP Java Web Start not starting up(An issue with RCP application not starting up using Java Web Start)
RCP Java Web Start not starting up [message #849518] Thu, 19 April 2012 08:07 Go to next message
Jack Elendil Lagare is currently offline Jack Elendil LagareFriend
Messages: 1
Registered: April 2012
Junior Member
I am attempting to run an Eclipse RCP application using Java Web Start. However, I encounter this error after the application is downloaded and run:

JNLP JREDesc in Component ignored: null

After that, the application closes. What is the workaround for this?

Attached is my main JNLP file.

I am using JDK 7 update 4. I tried JDK 6 update 31 as well as JDK 7 update 3 but the problem persists.
  • Attachment: start.jnlp
    (Size: 2.07KB, Downloaded 238 times)

[Updated on: Thu, 19 April 2012 08:08]

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Re: RCP Java Web Start not starting up [message #871099 is a reply to message #849518] Thu, 10 May 2012 20:20 Go to previous message
Rouven Röhrig is currently offline Rouven RöhrigFriend
Messages: 1
Registered: May 2012
Junior Member

I had the same problem and solved it.
(I'm using Eclipse 4.2 M6 and develop an e4 application).

I think "JNLP JREDesc in Component ignored: null" is not your problem.
The error will disappear if you remove the j2se definition(s) in your referenced jnlp file(s). However, I assume this is not your problem.

In my case, I didn't use the "osgi.bundles" property which is also missing in your start.jnlp and many tutorials.

You have to use the "osgi.bundles" property in order to "start" all your required bundles.

For instance, if you've defined
"plugins/" and
in your referenced jnlp files, then just add the following property to your "start.jnlp" file:


Just do this for all your required resources.


[Updated on: Thu, 10 May 2012 20:31]

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