jianghuazhu commented on code in PR #4321:
URL: https://github.com/apache/hadoop/pull/4321#discussion_r895119994
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java:
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@@ -1648,40 +1647,46 @@ public int metaSave(String[] argv, int idx) throws
IOException {
* @throws IOException If an error while getting datanode report
*/
public int printTopology() throws IOException {
- DistributedFileSystem dfs = getDFS();
- final DatanodeInfo[] report = dfs.getDataNodeStats();
-
- // Build a map of rack -> nodes from the datanode report
- HashMap<String, TreeSet<String> > tree = new HashMap<String,
TreeSet<String>>();
- for(DatanodeInfo dni : report) {
- String location = dni.getNetworkLocation();
- String name = dni.getName();
-
- if(!tree.containsKey(location)) {
- tree.put(location, new TreeSet<String>());
- }
+ DistributedFileSystem dfs = getDFS();
+ final DatanodeInfo[] report = dfs.getDataNodeStats();
+
+ // Build a map of rack -> nodes from the datanode report
+ HashMap<String, HashMap<String, String>> tree = new HashMap<String,
+ HashMap<String, String>>();
Review Comment:
Sorry, this is my mistake, I will update later.
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