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https://issues.apache.org/jira/browse/HADOOP-4044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12637608#action_12637608
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Doug Cutting commented on HADOOP-4044:
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> Doug should we pay the cost and do it the "right way" now?
Yes, of course.
> I prefer to use exceptions [ ... ]
But why? You've said it's "cleaner" and "simpler". I don't follow your
argument. "Simpler" could mean fewer lines of code. I don't think it will
actually change the lines of code much. Changing the return types will
*change* more lines of code, hence the change is more complex, but the
resulting code will probably be around the same size, regardless of which
approach is taken. "Cleaner" is subjective, like "better", and requires
elaboration.
My argument is that we should model normal functionality with normal
programming: methods, parameters, return values and data structures. Do you
disagree with this? Or do you think that links are not normal functionality?
You keep arguing that "exceptions can be used for recoverable conditions".
Indeed they can. But is a link really best modeled as a "recoverable
condition"? This sounds to me like a rationalization for using exceptions, not
a reason to use exceptions over data structures.
Please provide a reasoned explanation for your disagreement. Otherwise it is
hard to move forward.
> Create symbolic links in HDFS
> -----------------------------
>
> Key: HADOOP-4044
> URL: https://issues.apache.org/jira/browse/HADOOP-4044
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: symLink1.patch, symLink1.patch, symLink4.patch,
> symLink5.patch, symLink6.patch, symLink8.patch, symLink9.patch
>
>
> HDFS should support symbolic links. A symbolic link is a special type of file
> that contains a reference to another file or directory in the form of an
> absolute or relative path and that affects pathname resolution. Programs
> which read or write to files named by a symbolic link will behave as if
> operating directly on the target file. However, archiving utilities can
> handle symbolic links specially and manipulate them directly.
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