### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core.tests.model
Index: src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java,v
retrieving revision 1.106
diff -u -r1.106 ReconcilerTests.java
--- src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java	8 Nov 2006 15:18:37 -0000	1.106
+++ src/org/eclipse/jdt/core/tests/model/ReconcilerTests.java	9 Nov 2006 14:52:28 -0000
@@ -16,6 +16,7 @@
 
 import junit.framework.Test;
 
+import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IWorkspaceRunnable;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.ILogListener;
@@ -870,6 +871,84 @@
 	}
 }
 /**
+ * @bug 162621: [model][delta] Validation errors do not clear after replacing jar file
+ * @test Ensures that changing an internal jar and refreshing takes the change into account
+ * @see "https://bugs.eclipse.org/bugs/show_bug.cgi?id=162621"
+ */
+public void testChangeInternalJar() throws CoreException, IOException {
+	IJavaProject project = getJavaProject("Reconciler");
+	String jarName = "b162621.jar";
+	try {
+		String[] pathAndContents = new String[] {
+			"test/before/Foo.java",
+			"package test.before;\n" + 
+			"public class Foo {\n" + 
+			"}\n"
+		};
+		addLibrary(project, jarName, "b162621_src.zip", pathAndContents, JavaCore.VERSION_1_4);
+
+		// Set working copy content with no error
+		setUpWorkingCopy("/Reconciler/src/test/Test.java",
+			"package test;\n" + 
+			"import test.before.Foo;\n" + 
+			"public class Test {\n" + 
+			"	Foo f;\n" + 
+			"}\n"
+		);
+		assertProblems(
+			"Unexpected problems", 
+			"----------\n" + 
+			"----------\n"
+		);
+
+		// Update working copy with Jar expected changes
+		String contents = "package test;\n" + 
+			"import test.after.Foo;\n" + 
+			"public class Test {\n" + 
+			"	Foo f;\n" + 
+			"}\n";
+		setWorkingCopyContents(contents);
+		this.workingCopy.reconcile(ICompilationUnit.NO_AST, true, null, null);
+		assertProblems(
+			"Wrong expected problems", 
+			"----------\n" + 
+			"1. ERROR in /Reconciler/src/test/Test.java (at line 2)\n" + 
+			"	import test.after.Foo;\n" + 
+			"	       ^^^^^^^^^^\n" + 
+			"The import test.after cannot be resolved\n" + 
+			"----------\n" + 
+			"2. ERROR in /Reconciler/src/test/Test.java (at line 4)\n" + 
+			"	Foo f;\n" + 
+			"	^^^\n" + 
+			"Foo cannot be resolved to a type\n" + 
+			"----------\n"
+		);
+		
+		// change jar and refresh
+		String projectLocation = project.getProject().getLocation().toOSString();
+		String jarPath = projectLocation + File.separator + jarName;
+		org.eclipse.jdt.core.tests.util.Util.createJar(new String[] {
+			"test/after/Foo.java",
+			"package test.after;\n" + 
+			"public class Foo {\n" + 
+			"}\n"
+		}, jarPath, "1.4");
+		project.getProject().refreshLocal(IResource.DEPTH_INFINITE, null);
+
+		// Verify that error is gone
+		this.problemRequestor.initialize(contents.toCharArray());
+		this.workingCopy.reconcile(ICompilationUnit.NO_AST, true, null, null);
+		assertProblems(
+			"Unexpected problems", 
+			"----------\n" + 
+			"----------\n"
+		);
+	} finally {
+		removeLibraryEntry(project, new Path(jarName));
+		deleteFile(new File(jarName));
+	}
+}
+/**
  * Ensures that the reconciler reconciles the new contents with the current
  * contents,updating the structure of this reconciler's compilation
  * unit, and fires the Java element deltas for the structural changes
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/DeltaProcessor.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/DeltaProcessor.java,v
retrieving revision 1.291
diff -u -r1.291 DeltaProcessor.java
--- model/org/eclipse/jdt/internal/core/DeltaProcessor.java	6 Nov 2006 18:11:00 -0000	1.291
+++ model/org/eclipse/jdt/internal/core/DeltaProcessor.java	9 Nov 2006 14:52:30 -0000
@@ -624,6 +624,9 @@
 			int flags = IJavaElementDelta.F_CONTENT;
 			if (element instanceof JarPackageFragmentRoot){
 				flags |= IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED;
+				// need also to reset project cache otherwise it will be out-of-date
+				// see bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=162621
+				this.projectCachesToReset.add(element.getJavaProject());
 			}
 			if (isPrimary) {
 				flags |= IJavaElementDelta.F_PRIMARY_RESOURCE;