[jira] Updated: (HADOOP-4717) Removal of default port# in NameNode.getUri() cause a map/reduce job failed to prompt temporay output

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

     [ https://issues.apache.org/jira/browse/HADOOP-4717?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Doug Cutting updated HADOOP-4717:
---------------------------------

    Attachment: HADOOP-4717.patch

Here's a patch that changes DistributedFileSystem#makeQualified() to remove the default port if it's specified.  Does that fix things for you?

> Removal of default port# in NameNode.getUri() cause a map/reduce job failed to prompt temporay output
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-4717
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4717
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.18.0
>            Reporter: Hairong Kuang
>             Fix For: 0.18.3
>
>         Attachments: HADOOP-4717.patch
>
>
> Problem reported here is that when the default port number (8020) is specified in the output, job succeeds but no output is created. The cause of the problem is that "listStatus" call drops the port number because NameNode.getUri removes the default port#.
> Assuming that a map/reduce output directory is set to be "hdfs://localhost:8020/out", A call "listStatus" on any of its sub directory, for example, "hdfs://localhost:8020/out/tempXX", returns results like below: 
> hdfs://localhost/out/tempXX/part-00005
> Because of this, Task.java
>     574   private Path getFinalPath(Path jobOutputDir, Path taskOutput) {
>     575     URI relativePath = taskOutputPath.toUri().relativize(taskOutput.toUri());
> does not get the correct relativePath because TaskOutputPath contain ports, but taskOutput doesn't.
> It seems to me that the problem could be fixed if we make Path.makeQualified() to return the same path not matter the input path contains the default port or not. 

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