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  1. Hadoop HDFS
  2. HDFS-13195

DataNode conf page cannot display the current value after reconfig

    Details

    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      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:

      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();
      

      The confForInfoServer is a new configuration instance, while the dfsadmin reconfig the datanode's config, the config result cannot reflect to confForInfoServer, so we should use the datanode's conf.

        Attachments

        1. HDFS-13195.001.patch
          1 kB
          maobaolong
        2. HDFS-13195-branch-2.7.001.patch
          1 kB
          maobaolong
        3. HDFS-13195.002.patch
          0.9 kB
          maobaolong
        4. HDFS-13195-branch-2.7.002.patch
          0.9 kB
          maobaolong

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            People

            • Assignee:
              maobaolong maobaolong
              Reporter:
              maobaolong maobaolong
            • Votes:
              2 Vote for this issue
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              12 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: