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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HADOOP-10942) Globbing optimizations and regression fix
Date Fri, 13 May 2016 20:31:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15283108#comment-15283108
] 

Colin Patrick McCabe edited comment on HADOOP-10942 at 5/13/16 8:31 PM:
------------------------------------------------------------------------

The regression referred to here was fixed in HADOOP-10957.  The optimizations are already
implemented (we don't perform an RPC on each path component, only when we need to do so to
implement a wildcard.)


was (Author: cmccabe):
The regression fix referred to here was fixed in HADOOP-10957.  The optimizations are already
implemented (we don't perform an RPC on each path component, only when we need to do so to
implement a wildcard.)

> Globbing optimizations and regression fix
> -----------------------------------------
>
>                 Key: HADOOP-10942
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10942
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.1.0-beta, 3.0.0-alpha1
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>              Labels: BB2015-05-TBR
>         Attachments: HADOOP-10942.patch
>
>
> When globbing was commonized to support both filesystem and filecontext, it regressed
a fix that prevents an intermediate glob that matches a file from throwing a confusing permissions
exception.  The hdfs traverse check requires the exec bit which a file does not have.
> Additional optimizations to reduce rpcs actually increases them if directories contain
1 item.



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