HDFS-13250. Addendum to fix branch-2 compilation. RBF: Router to manage requests across multiple subclusters. Contributed by Inigo Goiri.

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java

@@ -1163,7 +1163,7 @@ public class RouterRpcServer extends AbstractService implements ClientProtocol {
     for (RemoteLocation loc : locations) {
       HdfsFileStatus fileStatus = results.get(loc);
       if (fileStatus != null) {
-        if (!fileStatus.isDirectory()) {
+        if (fileStatus.isDir()) {
           return fileStatus;
         } else if (dirStatus == null) {
           dirStatus = fileStatus;