Github user wengyanqing commented on a diff in the pull request:
https://github.com/apache/incubator-hawq/pull/828#discussion_r73455316
--- Diff: src/test/feature/lib/hdfs_config.h ---
@@ -0,0 +1,175 @@
+#ifndef HAWQ_SRC_TEST_FEATURE_LIB_HDFS_CONFIG_H_
+#define HAWQ_SRC_TEST_FEATURE_LIB_HDFS_CONFIG_H_
+
+#include <string>
+#include <vector>
+
+#include "psql.h"
+#include "sql_util.h"
+#include "xml_parser.h"
+
+namespace hawq {
+namespace test {
+
+/**
+ * HdfsConfig common libray. Get detailed information about HDFS
+ * including checking state of namenodes and datanodes, get parameter value
+ * @author Chunling Wang
+ */
+class HdfsConfig {
--- End diff --
Should HdfsConfig be singleton ?
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