dengzhhu653 commented on code in PR #3233:
URL: https://github.com/apache/hive/pull/3233#discussion_r860526502


##########
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/HiveMetaStoreClient.java:
##########
@@ -605,27 +608,44 @@ private THttpClient createHttpClient(URI store, boolean 
useSSL) throws MetaExcep
     String path = MetaStoreUtils.getHttpPath(MetastoreConf.getVar(conf, 
ConfVars.THRIFT_HTTP_PATH));
     String httpUrl = (useSSL ? "https://"; : "http://";) + store.getHost() + ":" 
+ store.getPort() + path;
 
-    String user = MetastoreConf.getVar(conf, 
ConfVars.METASTORE_CLIENT_PLAIN_USERNAME);
-    if (user == null || user.equals("")) {
-      try {
-        LOG.debug("No username passed in config " + 
ConfVars.METASTORE_CLIENT_PLAIN_USERNAME.getHiveName() +
-            ". Trying to get the current user from UGI" );
-        user = UserGroupInformation.getCurrentUser().getShortUserName();
-      } catch (IOException e) {
-        throw new MetaException("Failed to get client username from UGI");
+    HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
+    String authType = MetastoreConf.getAsString(conf, 
ConfVars.METASTORE_CLIENT_AUTH_MODE).toLowerCase(

Review Comment:
   nit: the var `METASTORE_CLIENT_AUTH_MODE` is strictly allowed to be some 
modes, maybe we do not need to localize here?



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