<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>A while back we found an issue with PHP around file locks.</p>
<p><a class="moz-txt-link-freetext" href="https://bugs.php.net/bug.php?id=53076">https://bugs.php.net/bug.php?id=53076</a></p>
<p>This would leave hanging processes that we could only kill by
forcibly remounting the filesystems.</p>
<p>Its not really a PHP bug but they are not willing to fix the code
to deal with Glusters idiosyncrasies.<br>
</p>
<br>
<div class="moz-cite-prefix">On 08/09/2018 09:10 AM, Nithya
Balachandran wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOUCJ=gOk_tcJ--o_KB1znViLcF+sP7U3sy+xYTk22CP-Bt9Gw@mail.gmail.com">
<div dir="ltr">Hi,
<div><br>
</div>
<div>Please provide the following:</div>
<div>
<ol>
<li>gluster volume info<br>
</li>
<li>statedump of the fuse process when it hangs</li>
</ol>
</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Nithya</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 9 August 2018 at 18:24, mabi <span
dir="ltr"><<a href="mailto:mabi@protonmail.ch"
target="_blank" moz-do-not-send="true">mabi@protonmail.ch</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
I recently upgraded my GlusterFS replica 2+1 (aribter) to
version 3.12.12 and now I see a weird behaviour on my client
(using FUSE mount) where I have processes (PHP 5.6 FPM)
trying to access a specific directory and then the process
blocks. I can't kill the process either, not even with kill
-9. I need to reboot the machine in order to get rid of
these blocked processes.<br>
<br>
This directory has one particularity compared to the other
directories it is that it has reached it's quota soft-limit
as you can see here in the output of gluster volume quota
list:<br>
<br>
Path Hard-limit
Soft-limit Used Available Soft-limit exceeded?
Hard-limit exceeded?<br>
------------------------------<wbr>------------------------------<wbr>------------------------------<wbr>------------------------------<wbr>-------<br>
/directory 100.0GB 80%(80.0GB)
90.5GB 9.5GB Yes No<br>
<br>
That does not mean that it is the quota's fault but it might
be a hint where to start looking for... And by the way can
someone explain me what the soft-limit does? or does it not
do anything special?<br>
<br>
Here is an the linux stack of a blocking process on that
directory which happened with a simple "ls -la":<br>
<br>
[Thu Aug 9 14:21:07 2018] INFO: task ls:2272 blocked for
more than 120 seconds.<br>
[Thu Aug 9 14:21:07 2018] Not tainted 3.16.0-4-amd64
#1<br>
[Thu Aug 9 14:21:07 2018] "echo 0 >
/proc/sys/kernel/hung_task_<wbr>timeout_secs" disables this
message.<br>
[Thu Aug 9 14:21:07 2018] ls D
ffff88017ef93200 0 2272 2268 0x00000004<br>
[Thu Aug 9 14:21:07 2018] ffff88017653f490
0000000000000286 0000000000013200 ffff880174d7bfd8<br>
[Thu Aug 9 14:21:07 2018] 0000000000013200
ffff88017653f490 ffff8800eeb3d5f0 ffff8800fefac800<br>
[Thu Aug 9 14:21:07 2018] ffff880174d7bbe0
ffff8800eeb3d6d0 ffff8800fefac800 ffff8800ffe1e1c0<br>
[Thu Aug 9 14:21:07 2018] Call Trace:<br>
[Thu Aug 9 14:21:07 2018] [<ffffffffa00dc50d>] ?
__fuse_request_send+0xbd/0x270 [fuse]<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff810abce0>] ?
prepare_to_wait_event+0xf0/<wbr>0xf0<br>
[Thu Aug 9 14:21:07 2018] [<ffffffffa00e0791>] ?
fuse_dentry_revalidate+0x181/<wbr>0x300 [fuse]<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff811b944e>] ?
lookup_fast+0x25e/0x2b0<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff811bacc5>] ?
path_lookupat+0x155/0x780<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff81195715>] ?
kmem_cache_alloc+0x75/0x480<br>
[Thu Aug 9 14:21:07 2018] [<ffffffffa00dfca9>] ?
fuse_getxattr+0xe9/0x150 [fuse]<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff811bb316>] ?
filename_lookup+0x26/0xc0<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff811bf594>] ?
user_path_at_empty+0x54/0x90<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff81193e08>] ?
kmem_cache_free+0xd8/0x210<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff811bf59f>] ?
user_path_at_empty+0x5f/0x90<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff811b3d46>] ?
vfs_fstatat+0x46/0x90<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff811b421d>] ?
SYSC_newlstat+0x1d/0x40<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff811d34b8>] ?
SyS_lgetxattr+0x58/0x80<br>
[Thu Aug 9 14:21:07 2018] [<ffffffff81525d0d>] ?
system_call_fast_compare_end+<wbr>0x10/0x15<br>
<br>
<br>
My 3 gluster nodes are all Debian 9 and my client Debian 8.<br>
<br>
Let me know if you need more information.<br>
<br>
Best regards,<br>
Mabi<br>
______________________________<wbr>_________________<br>
Gluster-users mailing list<br>
<a href="mailto:Gluster-users@gluster.org"
moz-do-not-send="true">Gluster-users@gluster.org</a><br>
<a
href="https://lists.gluster.org/mailman/listinfo/gluster-users"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://lists.gluster.org/<wbr>mailman/listinfo/gluster-users</a><br>
</blockquote>
</div>
<br>
</div>
<!--'"--><br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Gluster-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Gluster-users@gluster.org">Gluster-users@gluster.org</a>
<a class="moz-txt-link-freetext" href="https://lists.gluster.org/mailman/listinfo/gluster-users">https://lists.gluster.org/mailman/listinfo/gluster-users</a></pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Alvin Starr || land: (905)513-7688
Netvel Inc. || Cell: (416)806-0133
<a class="moz-txt-link-abbreviated" href="mailto:alvin@netvel.net">alvin@netvel.net</a> ||
</pre>
</body>
</html>