[GitHub] [hive] rbalamohan commented on a diff in pull request #3264: HVIE-26199 Reduce FileSystem init during user impersonation

[GitBox <gi...@apache.org>]

rbalamohan commented on code in PR #3264:
URL: https://github.com/apache/hive/pull/3264#discussion_r867711633


##########
common/src/java/org/apache/hadoop/hive/common/FileUtils.java:
##########
@@ -449,25 +462,18 @@ public static void checkFileAccessWithImpersonation(final FileSystem fs,
     }
 
     // Otherwise, try user impersonation. Current user must be configured to do user impersonation.
-    UserGroupInformation proxyUser = UserGroupInformation.createProxyUser(
-        user, UserGroupInformation.getLoginUser());
-    try {
-      proxyUser.doAs(new PrivilegedExceptionAction<Object>() {
-        @Override
-        public Object run() throws Exception {
-          FileSystem fsAsUser = FileSystem.get(fs.getUri(), fs.getConf());
-          ShimLoader.getHadoopShims().checkFileAccess(fsAsUser, stat, action);
-          addChildren(fsAsUser, stat.getPath(), children);
-          return null;
-        }
-      });
-    } finally {
-      FileSystem.closeAllForUGI(proxyUser);

Review Comment:
   Removing this can be dangerous. Is there any reason for removing this?



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