HDFS-6006. Merging change r1571813 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1571815 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -103,6 +103,9 @@ Release 2.4.0 - UNRELEASED
     HDFS-5939. WebHdfs returns misleading error code and logs nothing if trying
     to create a file with no DNs in cluster. (Yongjun Zhang via jing9)
 
+    HDFS-6006. Remove duplicate code in FSNameSystem#getFileInfo.
+    (Akira Ajisaka via cnauroth)
+
   OPTIMIZATIONS
 
     HDFS-5790. LeaseManager.findPath is very slow when many leases need recovery

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java

@@ -3409,9 +3409,6 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
     HdfsFileStatus stat = null;
     FSPermissionChecker pc = getPermissionChecker();
     checkOperation(OperationCategory.READ);
-    if (!DFSUtil.isValidName(src)) {
-      throw new InvalidPathException("Invalid file name: " + src);
-    }
     byte[][] pathComponents = FSDirectory.getPathComponentsForReservedPath(src);
     readLock();
     try {