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https://issues.apache.org/jira/browse/HADOOP-4368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653325#action_12653325
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Brian Bockelman commented on HADOOP-4368:
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Hey all,
This has gotten a bit worse under 0.19.0. In 0.19.0, "df" simply doesn't
report anything for Hadoop as a normal user but works as root. I.e., for
normal user:
[EMAIL PROTECTED] ~]$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 254G 34G 208G 14% /
/dev/sda1 99M 14M 81M 15% /boot
none 7.9G 0 7.9G 0% /dev/shm
nfs03:/mnt/raid 4.1T 1.7T 2.4T 41% /mnt/nfs03
nfs04:/mnt/raid 3.2T 1.1T 2.1T 34% /mnt/nfs04
dcache-pnfs.unl.edu:/fs
391M 79M 278M 22% /pnfs/unl.edu
For root,
[EMAIL PROTECTED] ~]$ sudo df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 254G 34G 208G 14% /
/dev/sda1 99M 14M 81M 15% /boot
none 7.9G 0 7.9G 0% /dev/shm
nfs03:/mnt/raid 4.1T 1.7T 2.4T 41% /mnt/nfs03
nfs04:/mnt/raid 3.2T 1.1T 2.1T 34% /mnt/nfs04
dcache-pnfs.unl.edu:/fs
391M 79M 278M 22% /pnfs/unl.edu
fuse 140T 122T 140T 47% /mnt/hadoop
> Superuser privileges required to do "df"
> ----------------------------------------
>
> Key: HADOOP-4368
> URL: https://issues.apache.org/jira/browse/HADOOP-4368
> Project: Hadoop Core
> Issue Type: Wish
> Components: contrib/fuse-dfs, dfs
> Affects Versions: 0.18.1
> Reporter: Brian Bockelman
> Priority: Minor
> Original Estimate: 0.17h
> Remaining Estimate: 0.17h
>
> super user privileges are required in DFS in order to get the file system
> statistics (FSNamesystem.java, getStats method). This means that when HDFS
> is mounted via fuse-dfs as a non-root user, "df" is going to return
> 16exabytes total and 0 free instead of the correct amount.
> As far as I can tell, there's no need to require super user privileges to see
> the file system size (and historically in Unix, this is not required).
> To fix this, simply comment out the privilege check in the getStats method.
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