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https://issues.apache.org/jira/browse/HADOOP-4717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12652849#action_12652849
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Koji Noguchi commented on HADOOP-4717:
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I understand that HADOOP-4717&HADOOP-4746 would fix the problem, but can we
throw an Exception when
{noformat}
575 URI relativePath = taskOutputPath.toUri().relativize(taskOutput.toUri());
{noformat}
doesn't return a relativePath?
If we hit a similar issue again, I would rather have the job fail
than job returning 0 but silently deleting the output.
> 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
> Assignee: Doug Cutting
> Priority: Blocker
> 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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