Advertisements

UXMON: mpathb – Only one path detected, no path redundancy

Node : linux.setaoffice.com
Node Type : Intel/AMD x64(HTTPS)
Severity : major
OM Server Time: 2015-10-14 12:39:19
Message : UXMON: mpathb – Only one path detected, no path redundancy
Msg Group : OS
Application : mpmon
Object : mp
Event Type :
not_found

Instance Name :
not_found

Instruction : <child CI outage:no> <parent CI outage:no> The multipathd -k”show map $device topology” command shows more details

Please check /var/opt/OV/log/OpC/mp_mon.log for more details

Checking the log file it complains about the mpathb

root@linux:~ # cat /var/opt/OV/log/OpC/mp_mon.log
Wed Oct 14 13:39:13 2015 : INFO : UXMONmpmon is running now, pid=21954
Wed Oct 14 13:39:13 2015 : Major: mpathb – Only one path detected, no path redundancy
Wed Oct 14 13:39:13 2015 : INFO : UXMONmpmon end, pid=21954
Wed Oct 14 13:56:12 2015 : INFO : UXMONmpmon is running now, pid=29130
Wed Oct 14 13:56:12 2015 : Major: mpathb – Only one path detected, no path redundancy
Wed Oct 14 13:56:12 2015 : INFO : UXMONmpmon end, pid=29130
Wed Oct 14 14:13:13 2015 : INFO : UXMONmpmon is running now, pid=36813
Wed Oct 14 14:13:13 2015 : Major: mpathb – Only one path detected, no path redundancy
Wed Oct 14 14:13:13 2015 : INFO : UXMONmpmon end, pid=36813
Wed Oct 14 14:30:13 2015 : INFO : UXMONmpmon is running now, pid=44029
Wed Oct 14 14:30:13 2015 : Major: mpathb – Only one path detected, no path redundancy
Wed Oct 14 14:30:13 2015 : INFO : UXMONmpmon end, pid=44029
Wed Oct 14 14:47:12 2015 : INFO : UXMONmpmon is running now, pid=51897
Wed Oct 14 14:47:13 2015 : INFO : UXMONmpmon end, pid=51897
Wed Oct 14 15:04:12 2015 : INFO : UXMONmpmon is running now, pid=58833
Wed Oct 14 15:04:12 2015 : INFO : UXMONmpmon end, pid=58833

In this server it is a local disk so it was added to the multipath blacklist

root@linux:~ # vi /etc/multipath.conf
blacklist {
devnode “^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*”
devnode “^hd[a-z]”
devnode “^sd[ab]$”
devnode “^cciss!c[0-9]d[0-9]*”
}

If you are in a VMware host, you can safely disable this module.

root@linux:~ # cp /var/opt/OV/bin/instrumentation/mp_mon.cfg /var/opt/OV/conf/OpC/

In the configuration file /var/opt/OV/conf/OpC/mp_mon.cfg set disable to yes

root@linux:~ # vi /var/opt/OV/conf/OpC/mp_mon.cfg
disable = yes

Advertisements
%d bloggers like this: