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From "Adric Eckstein (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CRUNCH-543) AvroPathPerKeyTarget copy nested subdirectories
Date Thu, 15 Oct 2015 19:01:05 GMT

    [ https://issues.apache.org/jira/browse/CRUNCH-543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14959424#comment-14959424
] 

Adric Eckstein commented on CRUNCH-543:
---------------------------------------

I think the attached CRUNCH-543b.patch should fix it (the two loops were only working with
an even number of subdirectories).  

Also, I removed the renaming of the files during the move.  I believe this was causing file
collisions when you don't group by the key prior to writing out (shouldn't have to group).
 Sticking with the output part* names, the files can safely be copied without risk of collision.

> AvroPathPerKeyTarget copy nested subdirectories
> -----------------------------------------------
>
>                 Key: CRUNCH-543
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-543
>             Project: Crunch
>          Issue Type: Improvement
>          Components: IO
>            Reporter: Adric Eckstein
>            Assignee: Josh Wills
>             Fix For: 0.13.0
>
>         Attachments: CRUNCH-543.patch, CRUNCH-543b.patch
>
>
> When using AvroPathPerKeyTarget to write out a subpath in the output directory using
a String key, the key might indicate multiple subfolders:
> Pair<String, String> kv = new Pair<String, String>("foo/bar", "value");
> PTable<String, String> kvs = pipeline.create(Arrays.asList(kv),Avros.tableOf(Avros.strings(),
Avros.strings()));
> PTables.asPTable(kvs).write(new AvroPathPerKeyTarget("output"));
> This throws the error:
> java.io.IOException: java.lang.IllegalArgumentException: Reducer output name 'bar' cannot
be parsed
> 	at org.apache.crunch.impl.mr.exec.CrunchJobHooks$CompletionHook.handleMultiPaths(CrunchJobHooks.java:92)
> ...
> In AvroPathPerKeyTarget the handleOutputs method would need to recursively copy subfolders
(currently only checks first level in output directory) to enable keys that define multiple
sub folders.



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