search

ganglia / ganglia-web

Ganglia Web Frontend
BSD 3-Clause "New" or "Revised" License
317 stars 169 forks source link

After Auto-Refresh, Cluster Node Graphs Become Blank #362

Open bkelly1984 opened 2 years ago

bkelly1984 commented 2 years ago

Running Ganglia 3.7.2 on CentOS 8, we discovered that the node graphs in the cluster view section of a ganglia cluster report would go blank after an auto-refresh. On load, the graphs would normally show a CPU or network report like this:

Sample of a working graph

then after an auto-refresh, all graphs would be empty, although high load nodes would still have a colored frame, like this:

Sample of a blank graph after update

Initial investigations suggested that graphs fetched after the update were missing a value for the "g" parameter, which specifies the metric to graph. A lot more troubleshooting found that the cluster_refresh.tpl template was not getting the metric_name variable properly set.

I modified cluster_view.php and moved what is currently line 636, $tpl_data->assign("metric_name", "{$user['metricname']}");, up to above line 608, if (! $refresh) {, so the variable would be set for both refresh and non-refresh cases. This seems to fix the issue.

I am not offering a means to recreate this issue, so I encourage others to speak up if they have a similar problem.

With that, I leave this issue to the Ganglia Gurus to handle as they see fit.

soon1713 commented 2 years ago

I've the same issue, running on CentOS 7.9, after upgrade to 3.7.5, all the graph shows "Empty RRDtool command, Likely bad graph config", previously it was fine (older version)

pkerney commented 1 year ago

I have the same problem on Centos 7.9.2009 ganglia 3.7.2 right now. Workaround by @bkelly1984 seems to work.

Micket commented 3 months ago

Can also confirm this still happens with 3.7.6 from EPEL 9