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https://issues.apache.org/jira/browse/HDFS-15970?focusedWorklogId=581523&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-581523
]
ASF GitHub Bot logged work on HDFS-15970:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 13/Apr/21 03:51
Start Date: 13/Apr/21 03:51
Worklog Time Spent: 10m
Work Description: tomscut commented on a change in pull request #2896:
URL: https://github.com/apache/hadoop/pull/2896#discussion_r612107351
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NetworkTopologyServlet.java
##########
@@ -0,0 +1,115 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hdfs.server.namenode;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager;
+import org.apache.hadoop.net.NetUtils;
+import org.apache.hadoop.net.Node;
+import org.apache.hadoop.net.NodeBase;
+import org.apache.hadoop.util.StringUtils;
+
+import javax.servlet.ServletContext;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.TreeSet;
+
+/**
+ * A servlet to print out the network topology.
+ */
+@InterfaceAudience.Private
+public class NetworkTopologyServlet extends DfsServlet {
+
+ public static final String PATH_SPEC = "/topology";
+
+ @Override
+ public void doGet(HttpServletRequest request, HttpServletResponse response)
Review comment:
I'm sorry, I don't quite understand what you mean. Could you please give
me some specific suggestions, thank you very much.
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Issue Time Tracking
-------------------
Worklog Id: (was: 581523)
Time Spent: 1h (was: 50m)
> Print network topology on the web
> ---------------------------------
>
> Key: HDFS-15970
> URL: https://issues.apache.org/jira/browse/HDFS-15970
> Project: Hadoop HDFS
> Issue Type: Wish
> Reporter: tomscut
> Assignee: tomscut
> Priority: Minor
> Labels: pull-request-available
> Attachments: hdfs-topology.jpg, hdfs-web.jpg
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> In order to query the network topology information conveniently, we can print
> it on the web.
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