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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9981) Listing in RawLocalFileSystem is inefficient
Date Wed, 25 Sep 2013 04:16:03 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13777134#comment-13777134
] 

Hadoop QA commented on HADOOP-9981:
-----------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12604875/HADOOP-9981.002.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-common-project/hadoop-common
hadoop-hdfs-project/hadoop-hdfs.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/3119//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/3119//console

This message is automatically generated.
                
> Listing in RawLocalFileSystem is inefficient
> --------------------------------------------
>
>                 Key: HADOOP-9981
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9981
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.3.0
>            Reporter: Kihwal Lee
>            Assignee: Colin Patrick McCabe
>            Priority: Critical
>         Attachments: HADOOP-9981.001.patch, HADOOP-9981.002.patch
>
>
> After HADOOP-9652, listStatus() or globStatus() calls against a local file system directory
is very slow.  A user was loading data from local file system to Hive and it took about 30
seconds. The same operation took less than a second pre-HADOOP-9652. 
> The input path had many other files beside the input files and strace showed that fork
& exec of stat against each and every one of them. jstack confirmed that this was being
done from getNativeFileLinkStatus().

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