[eclipse-sig] [Bug 1767770] New: Eclipse fails to start after update to Fedora 31

https://bugzilla.redhat.com/show_bug.cgi?id=1767770

Bug ID: 1767770
           Summary: Eclipse fails to start after update to Fedora 31
           Product: Fedora
           Version: 31
          Hardware: x86_64
                OS: Linux
            Status: NEW
         Component: eclipse
          Severity: high
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail]
  Target Milestone: ---
    Classification: Fedora

Created attachment 1631438
  --> https://bugzilla.redhat.com/attachment.cgi?id=1631438&action=edit
Eclipse log file including crash details.

Description of problem:

After upgrading to Fedora 31, opening eclipse fails and an error message is
shown, pointing to workspace/.metadata/.log , the contents of which are shown
(perhaps also including a successful launch after the crash?). The entries of
interest are those up until !ENTRY org.eclipse.osgi 4 0 2019-11-01
11:23:43.694, which includes the following error:
!ENTRY org.eclipse.osgi 4 0 2019-11-01 11:23:43.694
!MESSAGE Application error
!STACK 1
java.lang.NullPointerException
        at
org.eclipse.e4.ui.internal.workbench.ResourceHandler.loadMostRecentModel(ResourceHandler.java:181)
        at
org.eclipse.e4.ui.internal.workbench.swt.E4Application.loadApplicationModel(E4Application.java:385)
        at
org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:260)
        at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:589)
        at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
        at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:566)
        at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
        at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
        at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
        at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
        at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
        at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
        at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:661)
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:597)
        at org.eclipse.equinox.launcher.Main.run(Main.java:1476)
        at org.eclipse.equinox.launcher.Main.main(Main.java:1449)

Quite a few of the of the previous log entries refer to requirements not being
found.

It was possible to workaround this issue by deleting ~/.eclipse, however, this
is obviously not ideal behaviour on upgrade.

For interest, it seems that a similar bug was noted in 2010:
https://bugzilla.redhat.com/show_bug.cgi?id=601352
(I have not marked this as a duplicate since given how much time has passed
this is probably a distinct issue).

Version-Release number of selected component (if applicable):

How reproducible:

Steps to reproduce:
1. Use eclipse in Fedora 30

2. Upgrade to Fedora 31

3. Try to launch Eclipse

Actual results:

Crash

Expected results:
Eclipse opens successfully

Additional info: