[Gluster-users] directory ownership bug in gluster 3.4 & 3.5

Thu Sep 4 17:15:57 UTC 2014

On 09/04/2014 10:34 PM, John Mark Walker wrote:
> Thanks Pranith - has a bug been filed so we can track this?
https://bugzilla.redhat.com/show_bug.cgi?id=1138386

Pranith
>
> -JM
>
>
>
> On Thu, Sep 4, 2014 at 12:47 PM, Pranith Kumar Karampuri 
> <pkarampu at redhat.com <mailto:pkarampu at redhat.com>> wrote:
>
>     hi Peter,
>              Sorry for the delay in replying to this mail. I am able
>     to reproduce the bug consistently. Disabling stat-prefetch reduced
>     the number of times the errors come but it hasn't eliminated the
>     issue.
>
>     Following the strace output was interesting. The problem always
>     seems to be because the uid is not matching:
>     stat("/mnt/fuse1/test-target/test1409848960.3", {st_dev=makedev(0,
>     41), st_ino=12165775161408537538, st_mode=S_IFDIR|0550,
>     st_nlink=2, *st_uid=0*, st_gid=9999, st_blksize=131072,
>     st_blocks=1, st_size=6, st_atime=2014/09/04-22:12:40,
>     st_mtime=2014/09/04-22:12:40, st_ctime=2014/09/04-22:12:40}) = 0
>
>     uid is coming as 0 and gid is 9999. If we do a stat after the run
>     is over it is showing things correctly. I am yet to isolate the
>     problem. I will keep you updated once I find something.
>
>     Pranith
>
>
>     On 08/22/2014 11:15 PM, Peter Drake wrote:
>>     I have a replicated Gluster setup, 2 servers (fs-1 and fs-2) x 1
>>     brick.  I have two clients (also on fs-1 and fs-2) which mount
>>     the Gluster volume at /mnt/gfs (/mnt/gfs type fuse.glusterfs
>>     (rw,default_permissions,allow_other,max_read=131072)).  These
>>     clients have scripts which perform various file operations.  One
>>     operation they perform looks like this (note this is pseudocode,
>>     the actual script is PHP):
>>
>>     1. @mkdir(/mnt/gfs/somedir, 0550);
>>     2. chown(1234, /mnt/gfs/somedir);
>>     3. chgrp(1234, /mnt/gfs/somedir);
>>
>>     Note that line 1 may fail on either client because the directory
>>     may have been created on the other client.  These errors are
>>     suppressed/ignored.  When this operation is performed
>>     simultaneously on both clients, it usually succeeds in creating a
>>     directory with the expected permissions and ownership.
>>      Intermittently however, we see that these directories are not
>>     owned by the expected user and group.
>>
>>     I've created a PHP script which can be run on two clients
>>     simultaneously to reproduce the error:
>>     https://gist.github.com/pdrakeweb/ae046b4c70a42309be43
>>
>>     The only log entry I can find that appears to be related is from
>>     fs-1's mnt-gfs.log file:
>>
>>     [2014-08-22 12:27:57.661778] I
>>     [dht-layout.c:640:dht_layout_normalize] 0-test-fs-cluster-1-dht:
>>     found anomalies in /test-target/test1408710477.7. holes=1 overlaps=0
>>
>>     This occurs in both Gluster 3.4.1 and 3.5.2 (the only two
>>     versions I have tested for this).  I am unable to reproduce the
>>     problem on a local (non-gluster) filesystem.  I'd appreciate any
>>     insight people might have into what is going on here and whether
>>     this is a bug in Gluster.
>>
>>     -- 
>>     *Peter Drake *|* Cloud Software Engineer* | Acquia
>>     <http://acquia.com/>
>>
>>     O: 781.238.4236 <tel:781.238.4236>
>>
>>     *E:*peter.drake at acquia.com <mailto:peter.drake at acquia.com>|
>>      Skype: pdrakeweb
>>
>>     W:http://www.acquia.com
>>     <http://www.acquia.com/><http://www.acquia.com/>
>>
>>     Address: 25 Corporate Drive 4th Floor, Burlington, MA 01803
>>
>>
>>     Acquia ranked #1 Software Vendor on the 2012 Inc 500
>>     <http://www.acquia.com/about-us/newsroom/press-releases/inc-magazine-unveils-31st-annual-list-america-s-fastest-growing>
>>
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>>
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>>
>>
>>
>>
>>     -- 
>>     *Peter Drake *|* Cloud Software Engineer* | Acquia
>>     <http://acquia.com/>
>>
>>     O: 781.238.4236 <tel:781.238.4236>
>>
>>     *E:*peter.drake at acquia.com <mailto:peter.drake at acquia.com>|
>>      Skype: pdrakeweb
>>
>>     W:http://www.acquia.com<http://www.acquia.com/>
>>
>>     Address: 25 Corporate Drive 4th Floor, Burlington, MA 01803
>>
>>
>>     Acquia ranked #1 Software Vendor on the 2012 Inc 500
>>     <http://www.acquia.com/about-us/newsroom/press-releases/inc-magazine-unveils-31st-annual-list-america-s-fastest-growing>
>>
>>     Acquia named One of America’s Most Promising Companies by Forbes
>>     <http://www.acquia.com/about-us/newsroom/press-releases/acquia-named-forbes-100-list-america-s-most-promising-companies-nov>
>>
>>     Drupal Sites:http://drupalshowcase.com
>>
>>     Twitterhttp://www.twitter.com/Acquia
>>
>>
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