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https://issues.apache.org/jira/browse/HDFS-12681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16269283#comment-16269283
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Chris Douglas commented on HDFS-12681:
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bq. I would file a JIRA to change those to use the 1-RPC call approach (even
though, we need to keep some basic unit tests that makes sure that the 2-RPC
approach works).
Got it. Yes, that makes sense. I'll file a MR JIRA to fix the examples, there.
There are existing cases e.g., HADOOP-14600 that probably prevent us from
deprecating the 2-RPC variant, but we can at least make MR more efficient.
bq. Do all the MapReduce unit tests pass now?
Yes, they pass. I got one failure, which turned out to be spurious
(MAPREDUCE-7011).
I'll post a new patch presently.
> Make HdfsLocatedFileStatus a subtype of LocatedFileStatus
> ---------------------------------------------------------
>
> Key: HDFS-12681
> URL: https://issues.apache.org/jira/browse/HDFS-12681
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Chris Douglas
> Assignee: Chris Douglas
> Priority: Minor
> Attachments: HDFS-12681.00.patch, HDFS-12681.01.patch,
> HDFS-12681.02.patch, HDFS-12681.03.patch, HDFS-12681.04.patch,
> HDFS-12681.05.patch, HDFS-12681.06.patch, HDFS-12681.07.patch,
> HDFS-12681.08.patch, HDFS-12681.09.patch, HDFS-12681.10.patch,
> HDFS-12681.11.patch, HDFS-12681.12.patch, HDFS-12681.13.patch
>
>
> {{HdfsLocatedFileStatus}} is a subtype of {{HdfsFileStatus}}, but not of
> {{LocatedFileStatus}}. Conversion requires copying common fields and shedding
> unknown data. It would be cleaner and sufficient for {{HdfsFileStatus}} to
> extend {{LocatedFileStatus}}.
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