NagVis error

[robinjporter]

Hi there

We are trying to get NagVis working on a new XI server - however we see the error in the attached screenshot:

image002.jpeg

Any ideas on why this might occur, and how we could fix it?

Many thanks,

Robin

[ssax]

You can try adding this under your /etc/my.cnf [mysqld] section:

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init-connect='SET NAMES utf8'

If you're running EL8, put it in /etc/my.cnf.d/client.cnf under both [client] and [client-mariadb] sections, then restart mysql/mariadb.

Then restart mysql/mariadb:

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systemctl restart mariadb
systemctl restart mysql
systemctl restart mysqld

Then try again.

If it still fails, please PM me a copy of your profile, you can download it from Admin > System Profile by clicking the Download Profile button.

If you're unable to generate the the profile through the web interface, please try generating it from the command line by running these commands as root:

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rm -rf /usr/local/nagiosxi/var/components/profile*​​
/usr/local/nagiosxi/scripts/components/getprofile.sh SUPPORT

Then send me the resulting /usr/local/nagiosxi/var/components/profile.zip​ file.​

If the profile script fails, please include the ENTIRE output.

[DennisPR]

Adding init-connect='SET NAMES utf8' to /etc/my.cnf and restarting the offloaded database didn"t solve the issue.
Might the offloaded database be the issue ?

[ssax]

Not likely related.

Please PM me a copy of your profile.zip, you can download it from Admin > System Profile by clicking the Download Profile button.

Include the output of this command:

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rpm -qa | grep php

Additionally, what XI version are you running?

[ssax]

If you're running PHP 7.4 I think that is the reason, you will need to edit this file:

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/usr/local/nagvis/share/server/core/functions/oldPhpVersionFix.php

Change line 273 from this:

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$bytes = (ord($utf16{0}) << 8) | ord($utf16{1});

To this (replacing those braces with brackets):

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$bytes = (ord($utf16[0]) << 8) | ord($utf16[1]);

EDIT: What specific place in Nagvis did you go to in order to get that error?

[DennisPR]

I am indeed running PHP 7.4.
A lot more {} needed to be replaced by []
I have attached the file where I changed all needed entries and commented the original lines

[DennisPR]

After changing the php file as mentionned before I can start using Nagvis.
I was able to :

• Delete all demo maps
  Create a new map
  Upload a background
  Set the background for the new map

However when I want to add a host or service to the map I get the following error

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Failed to get objects: Error: (0) Undefined property: CorePDOHandler::$data<div class="details">URL: /nagvis/server/core/ajax_handler.php?mod=Map&act=addModify&show=action-nagios&type=host&x=329&y=195&_ajaxid=1610982102<br> File: /usr/local/nagvis/share/server/core/classes/CorePDOHandler.php<br> Line: 306<br> <code>#0 /usr/local/nagvis/share/server/core/classes/CorePDOHandler.php(306): nagvisExceptionErrorHandler(8, 'Undefined prope...', '/usr/local/nagv...', 306, Array)<br> #1 /usr/local/nagvis/share/server/core/classes/CorePDOHandler.php(332): CorePDOHandler->prep('SELECT name1,na...')<br> #2 /usr/local/nagvis/share/server/core/classes/GlobalBackendPDO.php(248): CorePDOHandler->query('SELECT name1,na...', Array)<br> #3 /usr/local/nagvis/share/server/core/mapcfg/default.php(145): GlobalBackendPDO->getObjects('host', '', '')<br> #4 /usr/local/nagvis/share/server/core/mapcfg/default.php(159): getObjectNames('host', Object(GlobalMapCfg), NULL, Array)<br> #5 /usr/local/nagvis/share/server/core/classes/ViewMapAddModify.php(394): listHostNames(Object(GlobalMapCfg), NULL, Array)<br> #6 /usr/local/nagvis/share/server/core/classes/ViewMapAddModify.php(509): ViewMapAddModify->drawField('host_name', Array, Array)<br> #7 /usr/local/nagvis/share/server/core/classes/ViewMapAddModify.php(537): ViewMapAddModify->drawFields(Array)<br> #8 /usr/local/nagvis/share/server/core/classes/ViewMapAddModify.php(620): ViewMapAddModify->drawForm()<br> #9 /usr/local/nagvis/share/server/core/classes/CoreModMap.php(133): ViewMapAddModify->parse()<br> #10 /usr/local/nagvis/share/server/core/functions/index.php(120): CoreModMap->handleAction()<br> #11 /usr/local/nagvis/share/server/core/ajax_handler.php(59): require('/usr/local/nagv...')<br> #12 {main}</code>Output: <pre><form id="addmodify" name="addmodify" action="javascript:submitForm('/nagvis/server/core/ajax_handler.php?mod=Map&amp;act=addModify', 'addmodify');" method="POST"> <input type="hidden" id="_form_name" name="_form_name" value="addmodify" /> <input type="hidden" id="_update" name="_update" value="0" /> <input type="hidden" id="sec" name="sec" value="general" /> <ul class="nav" id="nav"><li id="nav_general" class="active"><a href="javascript:toggle_section('general')">General</a></li><li id="nav_appearance" ><a href="javascript:toggle_section('appearance')">Appearance</a></li><li id="nav_state" ><a href="javascript:toggle_section('state')">Status</a></li><li id="nav_actions" ><a href="javascript:toggle_section('actions')">Actions</a></li><li id="nav_label" ><a href="javascript:toggle_section('label')">Label</a></li><li id="nav_worldmap" ><a href="javascript:toggle_section('worldmap')">Worldmap</a></li></ul><div id="sec_general" class="section" style=""><table class="mytable"><tr class="must"><td class=tdlabel>host_name</td><td class=tdbox></td><td class=tdfield></pre>

Is this also related to PHP 7.4 compatibility issues ?

[ssax]

It may be related, I'll need to lab this up, I'm currently installing XI and setting up PHP 7.4 to test against. If you don't hear from me by tomorrow midday, reply to the post so it pops up on our dashboard.

Thank you!

[DennisPR]

pop up

[ssax]

It's working properly for me with your changes.

Please create a ticket for this and include a link back to this forum thread so we can get a remote session setup to debug further:

https://support.nagios.com/tickets/

Thank you!