Dear Ganglia team, I am having an issue wherein the graphs on my ganglia 3.6.0 instance are not rendered.
Everything was working perfectly fine for the past 3 months, no issues faced with graphs. Last week, there was a DNS hostname change in our IT infrastructure after which the graphs stopped working. Please note that I am able to download the CSV for a graph, able to also "inspect" on the graph -- these work fine. But the image does not show up. In the /var/log/httpd/error_log file, I can see the following messages every time a graph is attempted to be rendered. ---- sh: -c: line 0: syntax error near unexpected token `newline' sh: -c: line 0: `/usr/bin/rrdtool graph - --start '-86400s' --end now --width 300 --height 123 --title 'server1.linux.com Load last day' --vertical-label 'Loads/Procs' --lower-limit 0 --slope-mode DEF:'a0'='/var/lib/ganglia/rrds/MY_SETUP/ server1.linux.com/load_one.rrd':'sum':AVERAGE DEF:'a2'='/var/lib/ganglia/rrds/LEO_PERF_SETUP/ server1.linux.com/cpu_num.rrd':'sum':AVERAGE DEF:'a3'='/var/lib/ganglia/rrds/LEO_PERF_SETUP/ server1.linux.com/proc_run.rrd':'sum':AVERAGE AREA:'a0'#BBBBBB:'1-min' VDEF:a0_last=a0,LAST VDEF:a0_min=a0,MINIMUM VDEF:a0_avg=a0,AVERAGE VDEF:a0_max=a0,MAXIMUM GPRINT:'a0_last':'Now\:%5.1lf%s' GPRINT:'a0_min':'Min\:%5.1lf%s' GPRINT:'a0_avg':'Avg\:%5.1lf%s' GPRINT:'a0_max':'Max\:%5.1lf%s\l' LINE2:'a2'#FF0000:'CPUs ' VDEF:a2_last=a2,LAST VDEF:a2_min=a2,MINIMUM VDEF:a2_avg=a2,AVERAGE VDEF:a2_max=a2,MAXIMUM GPRINT:'a2_last':'Now\:%5.1lf%s' GPRINT:'a2_min':'Min\:%5.1lf%s' GPRINT:'a2_avg':'Avg\:%5.1lf%s' GPRINT:'a2_max':'Max\:%5.1lf%s\l' LINE2:'a3'#2030F4:'Procs' VDEF:a3_last=a3,LAST VDEF:a3_min=a3,MINIMUM VDEF:a3_avg=a3,AVERAGE VDEF:a3_max=a3,MAXIMUM GPRINT:'a3_last':'Now\:%5.1lf%s' GPRINT:'a3_min':'Min\:%5.1lf%s' GPRINT:'a3_avg':'Avg\:%5.1lf%s' GPRINT:'a3_max':'Max\:%5.1lf%s\l' > ' ---- Further, I redirected the output of the above rrdtool command to a PNG file, and the image file opened up fine !! I even reverted the DNS hostname to the original state, but no luck. As suggested in another post, I confirmed that the conf_default.php file ends with "?>" and does not have any succeeding lines. Here are the version details: Ganglia Web Frontend version 3.5.12 Ganglia Web Backend *(gmetad)* version 3.6.0 RRDtool version 1.4.8. OS - RHES 6.3, 64-bit running on a VMware VM. Any pointers will be of much help. Please let me know if there is any other info / logs that is required to troubleshoot. Thanks, Anand Subbu
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