Calling org.openide.filesystems.Repository.removeFileSystem causes an exception 
in getNodeDelegate.

A printStackTrace call placed in getNodeDelegate gave the trace below.

The exception was discovered in FFJ Orion development, calling removeFileSystem 
from a beanshell script.

The exception text was:

//Error:// Uncaught exception: java.lang.IllegalStateException:  The data 
object ejb_1/stub/Session1EJB.java is invalid; you may not call getNodeDelegate 
on it; if this is thrown please create an issue in openide/loaders assigned to 
jglick@netbeans.org.

The trace:

java.lang.Throwable
	at org.openide.loaders.DataObject.getNodeDelegate(DataObject.java:240)
	at org.netbeans.modules.java.codesync.ModelEventAdapter.createSourceNode
(ModelEventAdapter.java:138)
	at org.netbeans.modules.java.codesync.ModelEventAdapter.getSourceNode
(ModelEventAdapter.java:133)
	at org.netbeans.modules.java.codesync.ModelEventAdapter.changesCommited
(ModelEventAdapter.java:285)
	at org.netbeans.modules.java.model.DefaultLangModel.fireCommitEvents
(DefaultLangModel.java:429)
	at org.netbeans.modules.java.model.DefaultLangModel.firePostCommitEvents
(DefaultLangModel.java:398)
	at org.netbeans.modules.java.model.DefaultLangModel.processOutputQueue
(DefaultLangModel.java:384)
	at org.netbeans.modules.java.model.DefaultLangModel.releaseWriteLock
(DefaultLangModel.java:350)
	at org.netbeans.modules.java.model.DefaultLangModel.invalidateModel
(DefaultLangModel.java:707)
	at org.netbeans.modules.java.parser.ParsingSupport.invalidate
(ParsingSupport.java:264)
	at org.netbeans.modules.java.JavaParserGlue.dissolve
(JavaParserGlue.java:437)
	at org.netbeans.modules.java.JavaParserGlue.access$500
(JavaParserGlue.java:65)
	at 
org.netbeans.modules.java.JavaParserGlue$SiblingListener.dataObjectPropertyChang
e(JavaParserGlue.java:534)
	at 
org.netbeans.modules.java.JavaParserGlue$SiblingListener.propertyChange
(JavaParserGlue.java:456)
	at org.openide.loaders.DataObject.firePropertyChange
(DataObject.java:778)
	at org.openide.loaders.DataObject.dispose(DataObject.java:168)
	at org.openide.loaders.DataObject.setValid(DataObject.java:183)
	at org.netbeans.modules.java.JavaDataObject.setValid
(JavaDataObject.java:277)
	at org.openide.loaders.DataObjectPool$Validator.removeInvalidObject
(DataObjectPool.java:867)
	at org.openide.loaders.DataObjectPool.removeInvalidObjects
(DataObjectPool.java:418)
	at org.openide.loaders.DataObjectPool.fileSystemRemoved
(DataObjectPool.java:435)
	at org.openide.filesystems.Repository.fireFileSystem
(Repository.java:469)
	at org.openide.filesystems.Repository.removeFileSystem
(Repository.java:210)
	at java.lang.reflect.Method.invoke(Native Method)
	at bsh.Reflect.invokeMethod(Reflect.java:317)
	at bsh.Reflect.invokeObjectMethod(Reflect.java:146)
	at bsh.BSHPrimarySuffix.doName(BSHPrimarySuffix.java:115)
	at bsh.BSHPrimarySuffix.doSuffix(BSHPrimarySuffix.java:79)
	at bsh.BSHPrimaryExpression.eval(BSHPrimaryExpression.java:35)
	at bsh.BSHBlock.eval(BSHBlock.java:29)
	at bsh.BSHTryStatement.eval(BSHTryStatement.java:56)
	at bsh.Interpreter.run(Interpreter.java:370)
	at java.lang.reflect.Method.invoke(Native Method)
	at org.netbeans.commandline.FjscriptMain.runInterpreter
(FjscriptMain.java:585)
	at org.netbeans.commandline.FjscriptMain$1.run(FjscriptMain.java:485)
	at org.netbeans.core.windows.RegistryImpl.attachExplorer
(RegistryImpl.java:150)
	at org.netbeans.core.windows.WindowManagerImpl.attachExplorer
(WindowManagerImpl.java:518)
	at org.netbeans.core.NbTopManager.attachExplorer(NbTopManager.java:359)
	at org.netbeans.commandline.FjscriptMain.main(FjscriptMain.java:478)
	at org.netbeans.commandline.FjscriptWrapper.run(FjscriptWrapper.java:96)
	at tonga.block.HarnessThread.run(tonga/block/HarnessThread.java:231)