Bug in eclipse, not showing anything in Install Software Screen - eclipse

Question

I have a problem with my eclipse. Whenever I go to the Install Software screen and put in a an update site, the screen shows nothing but when I click on the screen where I can select plugins they're there and I can actually go on to install the plugins.
I actually saw the plugins showing the first time I used it and then I got this error:
"A handler conflict occurred. This may
disable some commands"
eclipse.buildId=M20090917-0800
java.version=1.6.0_15 java.vendor=Sun
Microsystems Inc. BootLoader
constants: OS=linux, ARCH=x86, WS=gtk,
NL=en_PH Framework arguments:
-product org.eclipse.epp.package.jee.product
Command-line arguments: -os linux -ws
gtk -arch x86 -product
org.eclipse.epp.package.jee.product
Warning Sun Dec 27 14:13:49 PHT 2009
Conflict for
'org.eclipse.wst.jsdt.ui.edit.text.java.open.editor':HandlerActivation
(commandId=org.eclipse.wst.jsdt.ui.edit.text.java.open.editor,
handler=ActionHandler(org.eclipse.wst.jsdt.ui.actions.OpenAction#8eec22),
expression=AndExpression(AndExpression(org.eclipse.ui.SubActionBars$1#12f8a71,
ActivePartExpression(org.eclipse.ui.navigator.resources.ProjectExplorer#1e8b957)),
WorkbenchWindowExpression(org.eclipse.ui.internal.WorkbenchWindow#270fc4)),
sourcePriority=1064961)
HandlerActivation(commandId=org.eclipse.wst.jsdt.ui.edit.text.java.open.editor,
handler=ActionHandler(org.eclipse.wst.jsdt.ui.actions.OpenAction#8eec22),
expression=AndExpression(AndExpression(org.eclipse.ui.SubActionBars$1#12f8a71,
ActivePartExpression(org.eclipse.ui.navigator.resources.ProjectExplorer#1e8b957))
,WorkbenchWindowExpression(org.eclipse.ui.internal.WorkbenchWindow#270fc4)),
sourcePriority=1064961)

Answer 1

After reading items in this post I checked if deleting the .metadata folder fixed the situation. It fixed the problem but I lost my workspace settings. In order to fix this without losing your workspace settings you must delete only this file:
${YOUR_WORKSPACE_FOLDER}/.metadata/.plugins/org.eclipse.equinox.p2.ui/dialog_settings.xml

Answer 2

ggolebio had the right idea, and I'm assuming he got the information from https://bugs.eclipse.org/bugs/show_bug.cgi?id=324729
Rather than deleting the file do the following:
edit ${YOUR_WORKSPACE_FOLDER}/.metadata/.plugins/org.eclipse.equinox.p2.ui/dialog_settings.xml
set the AvailableNameColumnWidth to 420
set the AvailableVersionColumnWidth to 140.
Restart eclipse
profit
This will not kill your workspace customizations like other solutions do.

Answer 3

Deleting the .metadata folder fixed it for me. Not sure of the cause but it was around the time I upgraded to Juno

Answer 4

I had this problem too. First try creating a new workspace, and see if you still have the same problem. If so, then try deleting the .metadata directory from the corrupted workspace.
$ cd ~/<your-eclipse-corrupted-workspace>
$ rm -r .metadata/
I made the mistake of closing the "install new software" window after trying to filter "all available downloads" which was taking to long. That triggered the problem. I tried reinstalling. I uninstalled and reinstalled. I deleted my ~/.eclipse folder. That made eclipse start in the default workspace, ~/workspace which suddenly didn't have the problem. That's what made me realize that my problem was a corrupted workspace. As soon as I deleted the .metadata folder the problem disappeared.
There are bug reports on LaunchPad and eclipse.

Answer 5

Try installing the Eclipse package from Synaptic; it's been updated to the latest version just recently (though you may need to enable more recent updates from the Software Sources dialog or something).
Makes sure you install version 3.5.1-0ubuntu7 or later from Synaptic. I'm not in Ubuntu right now to check, but this bug has been fixed in that version and later. See this bug report.
If for some reason you can't do that, then do the workaround here.

Answer 6

They did not fix the issue. The solution of ggolebio, today 16 june 2015, is still working.
sudo rm /home/USERNAME/.workspace/.metadata/.plugins/org.eclipse.equinox.p2.ui/dialog_settings.xml

Answer 7

Sounds like a bug somewhere. This could be specific to your OS or environment.
Start by checking the Error Log view (to show it, use the Window -> Show View option. See if you are getting any exceptions there.
To eliminate workspace issues: Try with a new workspace (simply switch to a new workspace, you can always switch back later).
To eliminate issues with your specific installation: Try with a clean Eclipse install. You can download a new installation from eclipse.org and install it in a different directory.
Search for existing bugs in Eclipse Bugzilla. If there are none, report yours. Attaching your configuration to the bug report might help (under About Eclipse -> Installation Details -> Configuration, copy and save to a text file).