Home » Categories » Products » Nagios XI » Troubleshooting » Common Problems

Nagios XI - SQL Error [nagiosxi] : ERROR: syntax error

Problem Description

This KB article explains how to resolve an error similar to the following that appears in the Nagios XI GUI:

SQL Error [nagiosxi] : ERROR:  syntax error at or near "localhost"
LINE 1: ...ios XI','nagiosadmin',4,'User reconfigured host \'localhost\...


The postgresql log file in /var/lib/pgsql/data/pg_log/ will have more detailed information:

ERROR:  syntax error at or near "localhost" at character 166
STATEMENT: INSERT INTO xi_auditlog (log_time,source,"user",type,message,ip_address,details) VALUES ('2017-09-06 14:15:29','Nagios XI','nagiosadmin',4,'User reconfigured host \'localhost\'','','Array
            [host_name] => localhost
            [use] => linux-server
            [alias] => localhost
            [address] =>
            [first_notification_delay] => 0
            [notifications_enabled] => 1
            [register] => 1
            [contacts] => nagiosadmin


This error occurs on the Host or Service Status Detail page > Configure tab, when you are using the re-configure a host or service option.

The problem only occurs with older installations of Nagios XI that historically used PostgreSQL for the nagiosxi database. Fresh installations of Nagios XI since 5.x do not experience this issue.

The problem only occurs with PostgreSQL 9.1 or greater.




A simple change to the postgresql.conf file will resolve this problem.

Establish a terminal session to your Nagios XI server as root and edit the postgresql.conf file with this command:

vi /var/lib/pgsql/data/postgresql.conf

When using the vi editor, to make changes press i on the keyboard first to enter insert mode. Press Esc to exit insert mode.


Locate the following line:

#standard_conforming_strings =

Tip: typing /conform and pressing Enter in vi should take you directly to this section in the file.


Remove the # from the begging of the line and set it to off:

standard_conforming_strings = off


When you have finished, save the changes in vi by typing:


and press Enter.


You need to restart the postgresql service using one of the commands below:


RHEL/CentOS 5.x/6.x

service postgresql restart


RHEL/CentOS 7.x

systemctl restart postgresql.service


This completes the changes required for resolving the problem described above.



Further Information

The following documentation explains in detail the standard_conforming_strings option:




Final Thoughts

For any support related questions please visit the Nagios Support Forums at:


0 (0)
Article Rating (No Votes)
Rate this article
  • Icon PDFExport to PDF
  • Icon MS-WordExport to MS Word
Attachments Attachments
There are no attachments for this article.
Related Articles RSS Feed
XI 5.4 monitoring engine not running
Viewed 2706 times since Mon, Feb 6, 2017
Nagios XI - MRTG Reports SNMP_Session Errors
Viewed 1658 times since Wed, Jul 27, 2016
Nagios XI - Scheduled Reports Not Running
Viewed 851 times since Thu, Aug 10, 2017
Nagios XI - How To Use CA Certificates With check_ldaps Plugin
Viewed 2794 times since Tue, Jul 26, 2016
Nagios XI - Scheduled Downtime Not Working
Viewed 1932 times since Mon, Oct 10, 2016
Nagios XI - Unable to Delete Host
Viewed 6323 times since Tue, Dec 16, 2014
Nagios XI - Schedulded Backups No Longer Working
Viewed 2546 times since Fri, Jun 3, 2016
Nagios XI - Login Screen Keeps Redirecting To Itself
Viewed 1883 times since Wed, Jan 27, 2016
Nagios XI - SourceGuardian Errors 2009R1.2C
Viewed 2025 times since Tue, Feb 2, 2016
Nagios XI - ICMP and Ping Checks Stopped Graphing
Viewed 3052 times since Mon, Jan 25, 2016