RemoteRepositoryCacheManager should never throw the REPOSITOY_NOT_FOUND

because other metadata (xml, xml.jar or xml.jar.xz) could be found in
the cache, it shouldn't break directly with the first (content.xml)

tycho-bundles/org.eclipse.tycho.p2.resolver.impl/src/main/java/org/eclipse/tycho/p2/remote/RemoteRepositoryCacheManager.java

@@ -77,14 +77,19 @@ public File createCache(URI repositoryLocation, String prefix, IProgressMonitor
 
  @Override
  public File createCacheFromFile(URI remoteFile, IProgressMonitor monitor) throws ProvisionException, IOException {
+ File cacheFile = getCacheFile(remoteFile, getCacheDirectory());
  if (offline) {
- File cacheFile = getCacheFile(remoteFile, getCacheDirectory());
  if (cacheFile != null) {
  return cacheFile;
  }
- throw new ProvisionException(getFailureStatus(remoteFile));
  }
- return super.createCacheFromFile(remoteFile, monitor);
+ try {
+ return super.createCacheFromFile(remoteFile, monitor);
+ } catch (IOException e) {
+ return handleCreateCacheException(cacheFile, remoteFile, e);
+ } catch (ProvisionException e) {
+ return handleCreateCacheException(cacheFile, remoteFile, e);
+ }
  }
 
  private Status getFailureStatus(URI uri) throws ProvisionException {
@@ -100,8 +105,8 @@ public static File getCacheFile(URI url, File dataAreaFile) {
  return new File(dataAreaFile, Integer.toString(hashCode));
  }
 
- private <T extends Exception> File handleCreateCacheException(File cacheFile, URI repositoryLocation, T e)
- throws T {
+ private File handleCreateCacheException(File cacheFile, URI repositoryLocation, Exception e)
+ throws ProvisionException {
  if (cacheFile != null) {
  String message = "Failed to access p2 repository " + repositoryLocation.toASCIIString()
  + ", use local cache.";
@@ -114,7 +119,7 @@ private <T extends Exception> File handleCreateCacheException(File cacheFile, UR
  // original exception has been already logged
  return cacheFile;
  }
- throw e;
+ throw new ProvisionException(getFailureStatus(repositoryLocation));
  }
 
  @Override