Scala Eclipse Plugin initialisation Was: Scala Eclipse Plugin Conflicts with AJDT

Hi,

in eclipse/osgi a bundle is not allowed to do much work on startup. After 5 sec the framework aborts the loading of a bundle and ignores it after that.

I have seen the same case without AJDT, my way of getting the scala plugin back to work was closing all scala related projects and restart. Then opening a verys small scala project. If all of these steps are required? No idea but it worked.

After browsing trac sources I found a good candidate for causing the problem:

ScalaCompilationUnitManager.initCompilationUnits(ResourcesPlugin.getWorkspace)

in the start method in scala.tools.eclipse.ScalaUIPlugin, which appears to be the activator.

This is a severe problem effectivly limiting workspace sizes, but I wonder why the plugin developers never stumbled over this, as the plugin for sure has a larger codebase than I have.

I guess we should open a ticket.

Kind regards,
Jan

2009/2/1 Gordon Leland Hempton <ghempton@gmail.com>

I am trying to incorporate scala and the eclipse plugin into an existing project, however the project already has a dependency on aspectj's AJDT plugin and the Scala plugin and AJDT appear not to play nicely together. After installing the scala plugin, there are no errors, however none of the aspects are recognized by AJDT. The problem persists even if the Scala builder is not selected and even after I remove the Scala plugin. The only solution is to create a new workspace after the scala plugin has been removed. I have attempted this multiple times and am almost positive this is caused by the Scala eclipse plugin.

Inside the workspace log file there is the following:
!ENTRY org.eclipse.osgi 2 0 2009-02-01 01:31:00.762!MESSAGE While loading class "lampion.presentation.Presentations$", thread "Thread[worker-oakland,6,main]" timed out waiting (5000ms) for thread "Thread[main,6,main]" to finish starting bundle "reference:file:plugins\ch.epfl.lamp.sdt.core_2.7.3.final.jar [515]". To avoid deadlock, thread "Thread[worker-oakland,6,main]" is proceeding but "lampion.presentation.Presentations$" may not be fully initialized. !STACK 0org.osgi.framework.BundleException: State change in progress for bundle "reference:file:plugins\ch.epfl.lamp.sdt.core_2.7.3.final.jar" by thread "main". at org.eclipse.osgi.framework.internal.core.AbstractBundle.beginStateChange(AbstractBundle.java:1144) at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:263) at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:400) at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:111) at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:427) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:193) at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:368) at org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:444) at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:397) at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:385) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:87) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) at lampion.presentation.Presentations$ProjectImpl$Job.run(Presentations.scala:335)Caused by: org.eclipse.osgi.framework.internal.core.AbstractBundle$BundleStatusException ... 14 moreRoot exception:org.eclipse.osgi.framework.internal.core.AbstractBundle$BundleStatusException at org.eclipse.osgi.framework.internal.core.AbstractBundle.beginStateChange(AbstractBundle.java:1144) at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:263) at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:400) at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:111) at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:427) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:193) at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:368) at org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:444) at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:397) at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:385) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:87) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) at lampion.presentation.Presentations$ProjectImpl$Job.run(Presentations.scala:335)
I am using the version from the update site, 2.7.3final. Anyone have any ideas or suggestions?
Thanks,Gordon