Article ID: 8583, created on Jun 9, 2010, last review on Aug 12, 2014

  • Applies to:
  • Plesk 8.6 for Linux/Unix

Symptoms

Parallels Plesk Panel version 8.6 is installed on the server with Red Hat Enterprise Linux ES release 4

Physical hosting updating of the domain works slowly. It can run several minutes.


When update process is running you can see with the top command that utility /usr/local/psa/admin/bin/usermng is runing with isquotable-quiet parameter.

#top
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 6043 0.0 0.0 5552 1248 ? D 14:34 0:00 /usr/local/psa/admin/bin/usermng --isquotable-quiet

Sometimes the following error can be found in server log.

INFO: task usermng:31593 blocked for more than 120 seconds. 
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 
usermng D 0000E69D 3056 31593 31699 (NOTLB) 
e8932ec0 00000082 c5447f35 0000e69d 000000cc f6aaf368 000000cc 00000007 
e958eaa0 c5ac2a43 0000e69d 0067ab0e 00000002 e958ebac c5420a08 eaf53040 
c048d92e c57b7090 c54213a8 c542784c 00000020 00000000 00000000 00800003 
Call Trace: 
[<c048d92e>] mntput_no_expire+0x11/0x6a 
[<c04831d6>] do_path_lookup+0x219/0x27f 
[<c061c52d>] __mutex_lock_slowpath+0x4d/0x7c 
[<c061c56b>] .text.lock.mutex+0xf/0x14 
[<c049fcd6>] vfs_quota_off+0x28/0x355 
[<c04efc2a>] strncpy_from_user+0x29/0x42 
[<c0438da9>] down_read+0x8/0x11 
[<c04a2928>] sys_quotactl+0x36b/0x5e7 
[<c061e3c5>] do_page_fault+0x2d9/0x64f 
[<c061e43e>] do_page_fault+0x352/0x64f 
[<c0404ead>] sysenter_past_esp+0x56/0x79


Cause

When physical hosting update is running, usermng utility checks if quotas are supported on appropriate partition by disabling/enabling quota support.
This process uses CPU and takes several minutes.
 

Resolution

Replace the $PRODUCT_ROOT_D/admin/bin/usermng file with the fix from the  attachment .

Hotfix can be applied on Plesk 8.6 which is installed on Red Hat Enterprise Linux ES release 4 x86.

Read the http://kb.sp.parallels.com/en/8083 article about a hot-fix installation procedure.

Attachments

9fa0130c84cac4b292697ade62270a40 a914db3fdc7a53ddcfd1b2db8f5a1b9c 29d1e90fd304f01e6420fbe60f66f838 b8ef5052d936e902043e41759118114e 56797cefb1efc9130f7c48a7d1db0f0c

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