From 5bb1350922755317f277d2f3d59d1c2fc940ccb3 Mon Sep 17 00:00:00 2001
From: Yongjun Zhang <yzhang@cloudera.com>
Date: Tue, 14 Feb 2017 12:47:06 -0800
Subject: [PATCH] HDFS-11391. Numeric usernames do no work with WebHDFS FS
 write access. (Pierre Villard via Yongjun Zhang)

(cherry picked from commit 8e53f2b9b08560bf4f8e81e697063277dbdc68f9)
---
 .../hdfs/server/datanode/web/webhdfs/WebHdfsHandler.java    | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/web/webhdfs/WebHdfsHandler.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/web/webhdfs/WebHdfsHandler.java
index b0421f2d2b5..0f2a279ce2b 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/web/webhdfs/WebHdfsHandler.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/web/webhdfs/WebHdfsHandler.java
@@ -64,6 +64,7 @@ import org.apache.hadoop.fs.MD5MD5CRC32FileChecksum;
 import org.apache.hadoop.fs.ParentNotDirectoryException;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.hdfs.DFSClient;
+import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.client.HdfsDataInputStream;
 import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
 import org.apache.hadoop.hdfs.web.JsonUtil;
@@ -71,6 +72,7 @@ import org.apache.hadoop.hdfs.web.WebHdfsFileSystem;
 import org.apache.hadoop.hdfs.web.resources.GetOpParam;
 import org.apache.hadoop.hdfs.web.resources.PostOpParam;
 import org.apache.hadoop.hdfs.web.resources.PutOpParam;
+import org.apache.hadoop.hdfs.web.resources.UserParam;
 import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.Token;
@@ -103,6 +105,10 @@ public class WebHdfsHandler extends SimpleChannelInboundHandler<HttpRequest> {
     throws IOException {
     this.conf = conf;
     this.confForCreate = confForCreate;
+    /** set user pattern based on configuration file */
+    UserParam.setUserPattern(
+            conf.get(DFSConfigKeys.DFS_WEBHDFS_USER_PATTERN_KEY,
+                    DFSConfigKeys.DFS_WEBHDFS_USER_PATTERN_DEFAULT));
   }
 
   @Override