n o t e 1 9 . c o m

This morning, eclipse refused to start again on my Mac laptop. The following lines were in the .metadata/.log file:

!SUBENTRY 1 org.eclipse.ui.workbench 2 0 2007-10-23 14:50:10.999
!MESSAGE Conflict for 'com.perforce.team.ui.actions.unlock':
HandlerActivation(commandId=com.perforce.team.ui.actions.unlock,
handler=ActionDelegateHandlerProxy(null,com.perforce.team.ui.actions.UnlockAction),
expression=WorkbenchWindowExpression(org.eclipse.ui.internal.WorkbenchWindow@b0f929),sourcePriority=16384)
HandlerActivation(commandId=com.perforce.team.ui.actions.unlock,
handler=ActionDelegateHandlerProxy(null,com.perforce.team.ui.actions.UnlockAction),
expression=WorkbenchWindowExpression(org.eclipse.ui.internal.WorkbenchWindow@b0f929),sourcePriority=16384)

Deleting the .metadata/.lock file fixed the problem. I’m not sure what caused this problem, but deleting the .lock file did fix it.

Yesterday I ran the MAC OS X Disk Utility program and Repaired the Permissions and the Disk. This morning Eclipse wont start. I get this error (~/your-workspace/.metadata/.log):

!ENTRY org.eclipse.osgi 2 0 2007-08-28 14:57:04.550
!MESSAGE While loading class "org.eclipse.mylyn.internal.tasks.ui.ITaskHighlighter",
     thread "Thread[Worker-1,5,main]" timed out waiting (5000ms) for thread
     "Thread[Worker-3,5,main]" to finish starting bundle
     "update@plugins/org.eclipse.mylyn.tasks.ui_2.0.0.v20070627-1400.jar [125]".
     To avoid deadlock, thread "Thread[Worker-1,5,main]" is proceeding but
     "org.eclipse.mylyn.internal.tasks.ui.ITaskHighlighter" may not be fully initialized.
!STACK 0 org.osgi.framework.BundleException: State change in progress for bundle
     "update@plugins/org.eclipse.mylyn.tasks.ui_2.0.0.v20070627-1400.jar" by thread "Worker-3".

There may be an easier way to fix this problem short of a re-download and re-install of eclipse and all of the plugins that you use. Re-install of eclipse and all of its plugins is the options that I took (Perforce, Tomcat, Mylyn, Subclipse/Mylyn integration and Subversion plugins). The Subversion plugin, however, wont install. It complains about missing Mylar integration component. I’ve installed Mylyn integration component (Mylyn is the new name for Mylar). There must be a more recent version of Subversion….

This morning I fired up eclipse on OS X, and it just disappeared after I selected my workspace. Searching the workspace log file in your-workspace/.metadata/.log showed the following error:

!ENTRY org.eclipse.team.core 4 0 2007-07-19 09:51:03.988
!MESSAGE Could not instantiate provider com.perforce.team.core.PerforceTeamProvider
for project your-project.
!STACK 1

The only way out was to delete the .metadata folder and start eclipse again. Of course, once you’ve done this you’ll need to import your projects again. I’m not sure what has caused the perforce plugin for eclipse to fail, but it is really annoying that a failed attempt to instantiate the perforce plugin brings down the entire eclipse.

I fired up eclipse on OS X today and much to my surprise the project I’m working on failed to build by eclipse 3.2. In the Problems view, I saw this error:

Project XXX is missing the required library:
     '/System/Library/Java/Extensions/QTJSupport.jar'

I’m not sure what this library is supposed to do and why all of sudden is missing. Here is how you can fix this problem:

1. Upgrade to eclipse 3.3
2. Open the eclipse Preferences... menu and select Java > Installed JREs...; make sure that eclipse can locate the OS X Java 1.5. If it cannot (as was in my case), you manually add it. It is in the following folder:

   
   /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home
   

3. Now open the project properties, and make sure that the QTJSupport.jar is no longer referenced in Java Build Path > Libraries > JRE System Libraries. If it is, you’ll need to remove the JRE System Library and add it again.