[jdt-dev] SWTException loading org.eclipse.jdt.ui on update manager rest

["Adrian Colyer" <adrian_colyer@xxxxxxxxxx>]

We're developing the AJDT plugin that has a dependency on
org.eclipse.jdt.ui. When the update manager is used to install a new or
more recent version of AJDT from our update site, we ocassionally (not
every time, but reported by several users independently and also seen in
our testing) get the following error:


Error  May 21, 2003 15:32:55.247 Plug-in org.eclipse.ajdt.ui was unable to
load
class org.eclipse.ajdt.internal.builder.Builder.             //first class
alphabetically in our plugin
org.eclipse.core.internal.boot.DelegatingLoaderException:
org.eclipse.core.runtime.CoreException: Problems encountered starting up
plug-
in: "org.eclipse.jdt.ui".
...

The problem starting jdt.ui is an SWT invalid thread access:

Error  May 21, 2003 15:32:55.185 Problems occurred when invoking code from
plug-
in: "org.eclipse.core.runtime".
org.eclipse.swt.SWTException: Invalid thread access
at org.eclipse.swt.SWT.error(SWT.java:2332)
at org.eclipse.swt.SWT.error(SWT.java:2262)
at org.eclipse.swt.widgets.Widget.error(Widget.java:385)
at org.eclipse.swt.widgets.Shell.<init>(Shell.java:246)
at org.eclipse.swt.widgets.Shell.<init>(Shell.java:237)
at org.eclipse.swt.widgets.Shell.<init>(Shell.java:190)
at org.eclipse.swt.widgets.Shell.<init>(Shell.java:128)
at
org.eclipse.jface.resource.FontRegistry.defaultFont(FontRegistry.java:293)
at org.eclipse.jface.resource.FontRegistry.get(FontRegistry.java:370)
at
org.eclipse.jface.resource.JFaceResources.getFont(JFaceResources.java:183)
at org.eclipse.jdt.internal.ui.JavaPlugin.startup(JavaPlugin.java:241)
... <snip/>
at
org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:212)
at org.eclipse.core.internal.resources.Workspace.endOperation
(Workspace.java:884)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1600)
at org.eclipse.ui.actions.WorkspaceModifyOperation.run
(WorkspaceModifyOperation.java:85)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run
(ModalContext.java:101)

(see e.g. bugzilla 37948 for full trace).

It seems that the JavaPlugin.startup method is being called on a non-ui
thread (the build thread?). I've scoured all the AJDT files for static
initializers doing something they shouldn't and drawn a blank. Could this
be a bug in the update manager / jdt code??? Any clues appreciated :-)

Thanks,

-- Adrian.
adrian_colyer@xxxxxxxxxx