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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4139) fuse-dfs RO mode still allows file truncation
Date Thu, 08 Nov 2012 01:10:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492868#comment-13492868

Hadoop QA commented on HDFS-4139:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

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

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {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-hdfs-project/hadoop-hdfs.

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/3462//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/3462//console

This message is automatically generated.
> fuse-dfs RO mode still allows file truncation
> ---------------------------------------------
>                 Key: HDFS-4139
>                 URL: https://issues.apache.org/jira/browse/HDFS-4139
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: fuse-dfs
>    Affects Versions: 2.0.2-alpha
>            Reporter: Andy Isaacson
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-4139.001.patch
> Mounting a fuse-dfs in readonly mode with "-oro" still allows the user to truncate files.
> {noformat}
> $ grep fuse /etc/fstab
> hadoop-fuse-dfs#dfs://ubu-cdh-0.local /export/hdfs fuse noauto,ro 0 0
> $ sudo mount /export/hdfs
> $ hdfs dfs -ls /tmp
> ...
> -rw-r--r--   3 ubuntu hadoop          4 2012-11-01 14:18 /tmp/blah.txt
> $ echo foo > /export/hdfs/tmp/blah.txt
> -bash: /export/hdfs/tmp/blah.txt: Permission denied
> $  hdfs dfs -ls /tmp
> ...
> -rw-r--r--   3 ubuntu hadoop          0 2012-11-01 14:28 /tmp/blah.txt
> $ ps ax | grep dfs
> ...
> 13639 ?        Ssl    0:02 /usr/lib/hadoop/bin/fuse_dfs dfs://ubu-cdh-0.local /export/hdfs
-o ro,dev,suid
> {noformat}

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