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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6055) Change default configuration to limit file name length in HDFS
Date Sun, 09 Mar 2014 18:55:43 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13925282#comment-13925282
] 

Hadoop QA commented on HDFS-6055:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12633596/HDFS-6055.2.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}.  There were no new javadoc 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:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.server.namenode.TestCacheDirectives
                  org.apache.hadoop.hdfs.server.namenode.ha.TestHASafeMode

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/6361//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/6361//console

This message is automatically generated.

> Change default configuration to limit file name length in HDFS
> --------------------------------------------------------------
>
>                 Key: HDFS-6055
>                 URL: https://issues.apache.org/jira/browse/HDFS-6055
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 3.0.0, 2.4.0
>            Reporter: Suresh Srinivas
>            Assignee: Chris Nauroth
>         Attachments: HDFS-6055.1.patch, HDFS-6055.2.patch
>
>
> Currently configuration "dfs.namenode.fs-limits.max-component-length" is set to 0. With
this HDFS file names have no length limit. However, we see more users run into issues where
they copy files from HDFS to another file system and the copy fails due to the file name length
being too long.
> I propose changing the default configuration "dfs.namenode.fs-limits.max-component-length"
to a reasonable value. This will be an incompatible change. However, user who need long file
names can override this configuration to turn off length limit.
> What do folks think?



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