### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/ChangeClasspathOperation.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/ChangeClasspathOperation.java,v
retrieving revision 1.15
diff -u -r1.15 ChangeClasspathOperation.java
--- model/org/eclipse/jdt/internal/core/ChangeClasspathOperation.java	28 Apr 2009 16:53:01 -0000	1.15
+++ model/org/eclipse/jdt/internal/core/ChangeClasspathOperation.java	28 Apr 2010 11:02:56 -0000
@@ -39,7 +39,7 @@
 	 * - update project references
 	 * - create resolved classpath markers
 	 */
-	protected void classpathChanged(ClasspathChange change) throws JavaModelException {
+	protected void classpathChanged(ClasspathChange change, boolean refreshExternalFolder) throws JavaModelException {
 		// reset the project's caches early since some clients rely on the project's caches being up-to-date when run inside an IWorkspaceRunnable
 		// (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=212769#c5 )
 		JavaProject project = change.project;
@@ -59,7 +59,7 @@
 			new ProjectReferenceChange(project, change.oldResolvedClasspath).updateProjectReferencesIfNecessary();
 
 			// and ensure that external folders are updated as well
-			new ExternalFolderChange(project, change.oldResolvedClasspath).updateExternalFoldersIfNecessary(true/*refresh if external linked folder already exists*/, null);
+			new ExternalFolderChange(project, change.oldResolvedClasspath).updateExternalFoldersIfNecessary(refreshExternalFolder, null);
 
 		} else {
 			DeltaProcessingState state = JavaModelManager.getDeltaState();
Index: model/org/eclipse/jdt/internal/core/SetClasspathOperation.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/SetClasspathOperation.java,v
retrieving revision 1.157
diff -u -r1.157 SetClasspathOperation.java
--- model/org/eclipse/jdt/internal/core/SetClasspathOperation.java	2 Mar 2010 06:46:00 -0000	1.157
+++ model/org/eclipse/jdt/internal/core/SetClasspathOperation.java	28 Apr 2010 11:02:56 -0000
@@ -71,7 +71,7 @@
 			ClasspathChange classpathChange = perProjectInfo.setRawClasspath(this.newRawClasspath, this.referencedEntries, this.newOutputLocation, JavaModelStatus.VERIFIED_OK/*format is ok*/);
 
 			// if needed, generate delta, update project ref, create markers, ...
-			classpathChanged(classpathChange);
+			classpathChanged(classpathChange, true/*refresh if external linked folder already exists*/);
 
 			// write .classpath file
 			if (this.canChangeResources && perProjectInfo.writeAndCacheClasspath(this.project, this.newRawClasspath, this.newOutputLocation))
Index: model/org/eclipse/jdt/internal/core/SetContainerOperation.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/SetContainerOperation.java,v
retrieving revision 1.14
diff -u -r1.14 SetContainerOperation.java
--- model/org/eclipse/jdt/internal/core/SetContainerOperation.java	8 Apr 2010 10:05:52 -0000	1.14
+++ model/org/eclipse/jdt/internal/core/SetContainerOperation.java	28 Apr 2010 11:02:56 -0000
@@ -107,7 +107,7 @@
 					ClasspathChange classpathChange = affectedProject.getPerProjectInfo().resetResolvedClasspath();
 
 					// if needed, generate delta, update project ref, create markers, ...
-					classpathChanged(classpathChange);
+					classpathChanged(classpathChange, i==0/*refresh external linked folder only once*/);
 
 					if (this.canChangeResources) {
 						// touch project to force a build if needed
Index: model/org/eclipse/jdt/internal/core/SetVariablesOperation.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/SetVariablesOperation.java,v
retrieving revision 1.9
diff -u -r1.9 SetVariablesOperation.java
--- model/org/eclipse/jdt/internal/core/SetVariablesOperation.java	27 Jun 2008 16:03:50 -0000	1.9
+++ model/org/eclipse/jdt/internal/core/SetVariablesOperation.java	28 Apr 2010 11:02:56 -0000
@@ -144,7 +144,7 @@
 						ClasspathChange classpathChange = affectedProject.getPerProjectInfo().resetResolvedClasspath();
 
 						// if needed, generate delta, update project ref, create markers, ...
-						classpathChanged(classpathChange);
+						classpathChanged(classpathChange, true/*refresh if external linked folder already exists*/);
 
 						if (this.canChangeResources) {
 							// touch project to force a build if needed