Backport Target platform resolved multiple times

Author: laeubi

RELEASE_NOTES.md

@@ -20,7 +20,8 @@ As such, these two options have been re-introduced for Tycho 3.0.2 and are no lo
 - Provide a "verify-pom-resolves" mojo #1451 
 - JUnit 5.9 support in Tycho 3.0.x #1943
 - Consumer-POM should use packaging-type jar instead of eclipse-plugin #2005 
-- Mirroring of packed artifacts must be disabled 
+- Mirroring of packed artifacts must be disabled
+- Target platform resolved multiple times
 
 ## 3.0.1
 

tycho-bundles/org.eclipse.tycho.p2.resolver.shared/src/main/java/org/eclipse/tycho/p2/target/facade/TargetDefinitionFile.java

@@ -498,7 +498,7 @@ public static TargetDefinitionFile read(File file) {
 
     public static TargetDefinitionFile read(URI uri) {
         try {
-            return FILE_CACHE.computeIfAbsent(uri, key -> {
+            return FILE_CACHE.computeIfAbsent(uri.normalize(), key -> {
                 try {
                     try (InputStream input = uri.toURL().openStream()) {
                         return parse(parseDocument(input), uri.toASCIIString());