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

Thu Nov 21 16:17:57 UTC 2013

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
>>
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>>
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>>
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>>
>
>

-- 
*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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