[jira] [Created] (HDFS-13195) DataNode conf page cannot display the current value after reconfig

["maobaolong (JIRA)" <ji...@apache.org>]

maobaolong created HDFS-13195:
---------------------------------

             Summary: DataNode conf page  cannot display the current value after reconfig
                 Key: HDFS-13195
                 URL: https://issues.apache.org/jira/browse/HDFS-13195
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode
    Affects Versions: 2.7.1
            Reporter: maobaolong


Now the branch-2.7 support dfs.datanode.data.dir reconfig, but after i reconfig this key, the conf page's value is still the old config value.

The reason is that:


{code:java}
public DatanodeHttpServer(final Configuration conf,
      final DataNode datanode,
      final ServerSocketChannel externalHttpChannel)
    throws IOException {
    this.conf = conf;

    Configuration confForInfoServer = new Configuration(conf);
    confForInfoServer.setInt(HttpServer2.HTTP_MAX_THREADS, 10);
    HttpServer2.Builder builder = new HttpServer2.Builder()
        .setName("datanode")
        .setConf(confForInfoServer)
        .setACL(new AccessControlList(conf.get(DFS_ADMIN, " ")))
        .hostName(getHostnameForSpnegoPrincipal(confForInfoServer))
        .addEndpoint(URI.create("http://localhost:0"))
        .setFindPort(true);

    this.infoServer = builder.build();
{code}




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