"Map Image Update failed"

[tiarnaigh]

Hey guys.
I've recently upgrade my Zabbix server from 2.2.5 to 2.4 as per the instructions and ever since, I keep getting this annoying popup showing when I go to "Configuration -> Maps" and actually try to change a map/create a new one etc. I then can't do much really with the map, and none of the basic features (Like the grid, background image etc.) seem to be showing.

I've seen a few posts online about this error showing on previous older releases of Zabbix, but apparently this issue was fixed since. Any idea what the cause of it is and how I can work around it?

Thanks,
Michael

[Jason]

I've also seen this too. Odd thing is that it doesn't work in IE or firefox, but works in Chrome and Safari. This is on a web server running nginx. If I move back to apache then it all works fine again.

[Jason]

I found this https://support.zabbix.com/browse/ZBX-7262 which pointed to a php session issue.

The ownership on /var/lib/php/session folder was set to the apache group. I changed it to nginx and wiped all the old session cookies there and it has started working normally again.

[tiarnaigh]

You're a life saver Jason, well spotted. I hit exactly the same issue, and now it's working as expected. Where I hit the issue was after doing a base (yum install) of the httpd, it had set this dir to be owner by "apache", but I later updated httpd be to run as the "www" user instead. This never got updated for the sessions dir.

i.e.:

[root@zbx2dal0 html]# ls -lrth /var/lib/php/
total 4.0K
drwxrwx---. 2 root apache 4.0K Aug 19 2013 session
[root@zbx2dal0 html]# chown www:www /var/lib/php/session
[root@zbx2dal0 html]# ls -lrth /var/lib/php/
total 4.0K
drwxrwx---. 2 www www 4.0K Aug 19 2013 session
[root@zbx2dal0 html]# ls -lrth /var/lib/php/session/
total 0
[root@zbx2dal0 html]# ls -lrth /var/lib/php/session/
total 4.0K
-rw-------. 1 www www 66 Nov 18 09:46 sess_f5gt6slfodj5b3ntvmm0j0gnl6

Since updating this, the maps are now all working perfectly.

Great job,
M