[jira] Commented: (HADOOP-5200) NPE when the datanode comes up but the filesystem is set to file://

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

    [ https://issues.apache.org/jira/browse/HADOOP-5200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711669#action_12711669 ] 

Steve Loughran commented on HADOOP-5200:
----------------------------------------

the fix to NameNode for this is
  public static InetSocketAddress getAddress(Configuration conf) {
    URI fsURI = FileSystem.getDefaultUri(conf);
    if (fsURI == null) {
      throw new IllegalArgumentException(
              "No default filesystem URI in the configuration");
    }
    String auth = fsURI.getAuthority();
    if (auth == null) {
      throw new IllegalArgumentException(
              "No authority for the Filesystem URI " + fsURI);
    }
    return getAddress(auth);
  }
I've incorporated it into HADOOP-3628, but it is standalone and the three unit tests it needs wouldn't even need a namenode to be created. 

> NPE when the datanode comes up but the filesystem is set to file://
> -------------------------------------------------------------------
>
>                 Key: HADOOP-5200
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5200
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.21.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>
> If you bring up a namenode and the conf file points to file:/// as the URI, then the authority is null, breaking code that follows

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