[jira] [Commented] (HADOOP-12991) Conflicting default ports in DelegateToFileSystem

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

    [ https://issues.apache.org/jira/browse/HADOOP-12991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15307748#comment-15307748 ] 

Kai Sasaki commented on HADOOP-12991:
-------------------------------------

[~brahmareddy] Could you review this when you have time?

> Conflicting default ports in DelegateToFileSystem
> -------------------------------------------------
>
>                 Key: HADOOP-12991
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12991
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.7.2
>            Reporter: Kevin Hogeland
>            Assignee: Kai Sasaki
>         Attachments: HADOOP-12991.01.patch
>
>
> HADOOP-12304 introduced logic to ensure that the {{DelegateToFileSystem}} constructor sets the default port to -1:
> {code:title=DelegateToFileSystem.java}
>   protected DelegateToFileSystem(URI theUri, FileSystem theFsImpl,
>       Configuration conf, String supportedScheme, boolean authorityRequired)
>       throws IOException, URISyntaxException {
>     super(theUri, supportedScheme, authorityRequired, 
>         getDefaultPortIfDefined(theFsImpl));
>     fsImpl = theFsImpl;
>     fsImpl.initialize(theUri, conf);
>     fsImpl.statistics = getStatistics();
>   }
>   private static int getDefaultPortIfDefined(FileSystem theFsImpl) {
>     int defaultPort = theFsImpl.getDefaultPort();
>     return defaultPort != 0 ? defaultPort : -1;
>   }
> {code}
> However, {{DelegateToFileSystem#getUriDefaultPort}} returns 0:
> {code:title=DelegateToFileSystem.java}
>   public int getUriDefaultPort() {
>     return 0;
>   }
> {code}
> This breaks {{AbstractFileSystem#checkPath}}:
> {code:title=AbstractFileSystem.java}
>     int thisPort = this.getUri().getPort(); // If using DelegateToFileSystem, this is -1
>     int thatPort = uri.getPort(); // This is -1 by default in java.net.URI
>     if (thatPort == -1) {
>       thatPort = this.getUriDefaultPort();  // Sets thatPort to 0
>     }
>     if (thisPort != thatPort) {
>       throw new InvalidPathException("Wrong FS: " + path + ", expected: "
>           + this.getUri());
>     }
> {code}
> Which breaks any subclasses of {{DelegateToFileSystem}} that don't specify a port (S3n, Wasb(s)).



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