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From "maobaolong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-13195) DataNode conf page cannot display the current value after reconfig
Date Mon, 26 Feb 2018 09:26:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-13195?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

maobaolong updated HDFS-13195:
------------------------------
       Fix Version/s: 2.7.1
    Target Version/s: 2.7.1
              Status: Patch Available  (was: Open)

> 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
>            Priority: Minor
>             Fix For: 2.7.1
>
>         Attachments: HDFS-13195-branch2.7.patch
>
>
> 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}
> 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.



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