This is related with a version compatibility issue.
nano +26 /usr/share/ganglia/cluster_view.php
change
$context_metrics = “”;
to
$context_metrics = array();
will do the job.
My work, my view, and my imagination

This is related with a version compatibility issue.
nano +26 /usr/share/ganglia/cluster_view.php
change
$context_metrics = “”;
to
$context_metrics = array();
will do the job.