<div dir="ltr"><div><div><div>Hi Alvin,<br><br></div>Thanks for the dump output. It helped a bit.<br><br></div>For now, recommend turning off open-behind and read-ahead performance translators for you to get rid of this situation, As I noticed hung FLUSH operations from these translators.<br><br></div>-Amar<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 29, 2017 at 6:56 AM, Alvin Starr <span dir="ltr"><<a href="mailto:alvin@netvel.net" target="_blank">alvin@netvel.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">We are running gluster 3.8.9-1 on Centos 7.3.1611 for the servers and on the clients 3.7.11-2 on Centos 6.8<br>
<br>
We are seeing httpd processes hang in fuse_request_send or sync_page.<br>
<br>
These calls are from PHP 5.3.3-48 scripts<br>
<br>
I am attaching a tgz file that contains the process dump from glusterfsd and the hung pids along with the offending pid's stacks from /proc/{pid}/stack.<br>
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This has been a low level annoyance for a while but it has become a much bigger issue because the number of hung processes went from a few a week to a few hundred a day.<span class="HOEnZb"><font color="#888888"><br>
<br>
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-- <br>
Alvin Starr || voice: (905)513-7688<br>
Netvel Inc. || Cell: (416)806-0133<br>
<a href="mailto:alvin@netvel.net" target="_blank">alvin@netvel.net</a> ||<br>
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