cluster report not displayed

[Paul Jähne]

When you open the ganglia webfrontend in a browser there is nothing displayed in the cluster report. The host views work. There should be an overview of the cluster.

/var/log/apache2/error.log:
PHP Fatal error: Uncaught Error: [] operator not supported for strings in /usr/share/ganglia-webfrontend/cluster_view.php:34\nStack trace:\n#0 /usr/share/ganglia-webfrontend/cluster_view.php(757): get_picker_metrics(Array, Array, '/usr/share/gang...', 'rrdtool')\n#1 /usr/share/ganglia-webfrontend/index.php(51): include_once('/usr/share/gang...')\n#2 {main}\n thrown in /usr/share/ganglia-webfrontend/cluster_view.php on line 34, referer: https://monitoring/ganglia/

Description: Ubuntu 18.04.2 LTS
Release: 18.04
ganglia-webfrontend:
  Installed: 3.6.1-3
  Candidate: 3.6.1-3
  Version table:
 *** 3.6.1-3 500
        500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://de.archive.ubuntu.com/ubuntu bionic/universe i386 Packages
        100 /var/lib/dpkg/status

[Paul Jähne (sethosii)]

Removing the array operator seems to fix the problem.

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "cluster_view.patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Paul Jähne (sethosii)]

The previous patch had a problem on updating (and probably for multiple clusters). This one doesn't and this is what is in the upstream repo: https://github.com/ganglia/ganglia-web/blob/master/cluster_view.php#L25.

[Martin Gabelmann (m-gabelmann)]

Can confirm, applying the upstream patch fixes it. So, updating to the latest ganglia-web version would be nice.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Rene Meier (meier.rene)]

I have the same issue and the upstream patch fixes it.

[trautenberg (trautenberg)]

I had the same problem. The upstream patch fixes it just partially. The view is not the way it should be.

[trautenberg (trautenberg)]

The problem was finally easy to be fixed. As stated above, the problem is in cluster_view.php, line34. Just going to line 26 and substituting

  $context_metrics = "";

with

  $context_metrics = array();

fixes the whole problem! The solution was found at https://github.com/ganglia/ganglia-web/issues/324.

[Sam Morrison (sorrison)]

The affects Ubuntu 20.04 too

[papamoose (papam0ose)]

+1 for 20.04. Please patch this. I've wasted so much time thinking this was a configuration issue on my end.