[Gluster-users] Fwd: bug in 3.4.1 when creating symlinks

Fri Nov 22 18:33:06 UTC 2013

Thanks for testing the patch Peter. Will appreciate if you can vote based
on your results on http://review.gluster.org/6319/. That will help get it
merged sooner and into a release.

Thanks again,
Avati

On Thu, Nov 21, 2013 at 8:17 AM, Peter Drake <peter.drake at acquia.com> wrote:

> Great, after initial testing that patch appears to have addressed the
> problem.  I will put it through our full system tests, but at least my
> example script can no longer reproduce the problem.  Thank you.
>
>
> On Wed, Nov 20, 2013 at 10:25 PM, Anand Avati <avati at gluster.org> wrote:
>
>> Peter,
>> Thanks, this was helpful. Can you please try out the following patch:
>>
>> http://review.gluster.org/6319
>>
>>
>> Thanks,
>> Avati
>>
>>
>> On Wed, Nov 20, 2013 at 6:35 PM, Peter Drake <peter.drake at acquia.com>wrote:
>>
>>> I've included straces from both successful and unsuccessful exections,
>>> as well as the PHP error information below.  Let me know if there is
>>> anything else I can provide which would be helpful.
>>>
>>> PHP Error (as provided by error_get_last()):
>>>
>>> Array
>>> (
>>>     [type] => 2
>>>     [message] => symlink(): No such file or directory
>>>     [file] => /tmp/symlink-test.php
>>>     [line] => 78
>>> )
>>>
>>> Straces on both clients for symlink creation which was unsuccessful on
>>> one client:
>>>
>>> Strace on unsuccessful client web-1:
>>> lstat("/mnt/gfs/test1385000751", {st_mode=S_IFLNK|0777, st_size=20,
>>> ...}) = 0
>>> lstat("/tmp/test1385000751", 0x7fff2b5eb2e0) = -1 ENOENT (No such file
>>> or directory)
>>> lstat("/mnt/gfs/test1385000751", {st_mode=S_IFLNK|0777, st_size=20,
>>> ...}) = 0
>>> readlink("/mnt/gfs/test1385000751", 0x7fff2b5eb3f0, 4096) = -1 EINVAL
>>> (Invalid argument)
>>> lstat("/tmp/test1385000751", 0x7fff2b5ef2d0) = -1 ENOENT (No such file
>>> or directory)
>>> write(1, "Failed to create local link: /tm"..., 50) = 50
>>>
>>> Strace on successful client web-2:
>>> lstat("/mnt/gfs/test1385000751", 0x7fff3171b720) = -1 ENOENT (No such
>>> file or directory)
>>> lstat("/mnt/gfs/test1385000751", 0x7fff31717730) = -1 ENOENT (No such
>>> file or directory)
>>> symlink("/mnt/gfs/test-target", "/mnt/gfs/test1385000751") = 0
>>> lstat("/mnt/gfs/test1385000751", {st_mode=S_IFLNK|0777, st_size=20,
>>> ...}) = 0
>>> lstat("/tmp/test1385000751", 0x7fff31717730) = -1 ENOENT (No such file
>>> or directory)
>>> lstat("/mnt/gfs/test1385000751", {st_mode=S_IFLNK|0777, st_size=20,
>>> ...}) = 0
>>> readlink("/mnt/gfs/test1385000751", "/mnt/gfs/test-target"..., 4096) = 20
>>> symlink("/mnt/gfs/test1385000751", "/tmp/test1385000751") = 0
>>> lstat("/tmp/test1385000751", {st_mode=S_IFLNK|0777, st_size=23, ...}) = 0
>>>
>>>
>>> Straces on both clients for symlink creation which was successful on
>>> both clients:
>>>
>>> Strace on successful client web-1:
>>> lstat("/mnt/gfs/test1385000727", {st_mode=S_IFLNK|0777, st_size=20,
>>> ...}) = 0
>>> lstat("/tmp/test1385000727", 0x7fff31717730) = -1 ENOENT (No such file
>>> or directory)
>>> lstat("/mnt/gfs/test1385000727", {st_mode=S_IFLNK|0777, st_size=20,
>>> ...}) = 0
>>> readlink("/mnt/gfs/test1385000727", "/mnt/gfs/test-target"..., 4096) = 20
>>> symlink("/mnt/gfs/test1385000727", "/tmp/test1385000727") = 0
>>> lstat("/tmp/test1385000727", {st_mode=S_IFLNK|0777, st_size=23, ...}) = 0
>>>
>>> Strace on successful client web-2:
>>> lstat("/mnt/gfs/test1385000727", 0x7fff2b5ef2d0) = -1 ENOENT (No such
>>> file or directory)
>>> lstat("/mnt/gfs/test1385000727", 0x7fff2b5eb2e0) = -1 ENOENT (No such
>>> file or directory)
>>> symlink("/mnt/gfs/test-target", "/mnt/gfs/test1385000727") = 0
>>> lstat("/mnt/gfs/test1385000727", {st_mode=S_IFLNK|0777, st_size=20,
>>> ...}) = 0
>>> lstat("/tmp/test1385000727", 0x7fff2b5eb2e0) = -1 ENOENT (No such file
>>> or directory)
>>> lstat("/mnt/gfs/test1385000727", {st_mode=S_IFLNK|0777, st_size=20,
>>> ...}) = 0
>>> readlink("/mnt/gfs/test1385000727", "/mnt/gfs/test-target"..., 4096) = 20
>>> symlink("/mnt/gfs/test1385000727", "/tmp/test1385000727") = 0
>>> lstat("/tmp/test1385000727", {st_mode=S_IFLNK|0777, st_size=23, ...}) = 0
>>>
>>>
>>>
>>> On Wed, Nov 13, 2013 at 3:24 PM, Anand Avati <avati at gluster.org> wrote:
>>>
>>>>
>>>>
>>>>
>>>> On Wed, Nov 13, 2013 at 12:14 PM, Peter Drake <peter.drake at acquia.com>wrote:
>>>>
>>>>> Thanks for taking the time to look at this and reply.  To clarify, the
>>>>> script that was running and created the log entries is an internal tool
>>>>> which does lots of other, unrelated things, but the part that caused the
>>>>> error takes actions very similar to the gist.  I tried to pull out the
>>>>> related log entries to the best of my ability.  The script in the gist did
>>>>> not create those log entries, but it does reliably reproduce the same error
>>>>> / failure (failure when attempting to create a symlink from the local
>>>>> filesystem to a symlink on the gluster filesystem).  I would not be
>>>>> surprised if the PHP version of symlink has behavior that is different than
>>>>> the symlink syscall.
>>>>>
>>>>>
>>>> So what is the failure (errno) when creating a symlink from local fs to
>>>> glusterfs? Can you get an strace of the script when the error happens?
>>>>
>>>> Avati
>>>>
>>>
>>>
>>>
>>> --
>>> *Peter Drake *|* Cloud Software Engineer* |  Acquia <http://acquia.com/>
>>>
>>> O: 781.238.4236
>>>
>>> *E:* 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
>>> Twitter http://www.twitter.com/Acquia
>>>
>>
>>
>
>
> --
> *Peter Drake *|* Cloud Software Engineer* |  Acquia <http://acquia.com/>
>
> O: 781.238.4236
>
> *E:* 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
> Twitter http://www.twitter.com/Acquia
>
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