Holes in graphs

[archen]

Hello,

I'm having small holes in every graph, always in the same position for each graph.
This always happened since I installed cacti one month ago.
I have cacti 0.8.8f installed from repository on ubuntu server 16.04.
I noticed that ubuntu installed rrdtools 1.5.5-4, while this version of cacti only support rrdtools 1.4, so it could be one issue (not sure).
I also noticed that in the /var/log/cacti/poller-error.log there is a long list of

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PHP Fatal error:  Uncaught Error: Call to undefined function split() in /usr/share/cacti/site/poller.php:454
Stack trace:
#0 {main}
  thrown in /usr/share/cacti/site/poller.php on line 454

I suppose this is more likely to be *the* issue.
I'm using spine as poller type. The poller interval is 30 seconds and the cron interval is every minute.
The php version I have installed is

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php -v
PHP 7.0.8-0ubuntu0.16.04.2 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.8-0ubuntu0.16.04.2, Copyright (c) 1999-2016, by Zend Technologies

Does anyone have the same issue or know how to solve it?
Please tell me if you need any further information.
Thank you very much and best regards

[cigamit]

Your PHP is too new, you will need to downgrade it.

[archen]

Hello cigamit,

Sorry for the late reply.
I just tried to downgrade my PHP to php5.
I had to do a bit of work because of dependencies and when I installed cacti again, it pulled php7.0 from repository, even if php5 was already installed with the needed modules.

So it appears I am still stuck with php7 and the same problems as before.

Any suggestion?

Thank you very much and best regards

[archen]

Hi,
I am still with the same problem as before: I cannot find any way to downgrade my php version. I also do not understand why this php version is chosen by ubuntu maintainers if it does not work with cacti.

Any suggestion?

Thank you very much and best regards