Indeed htmlspecialchars will do that however it's not used in
stacked.php at least not in the Github repo. You could try and comment
out this line
https://github.com/ganglia/ganglia-web/blob/master/functions.php#L1416
Then look in /tmp for a ganglia-graph file with full invocation to make
sure that output is somehow not getting encoded.
Vladimir
On 2/15/24 16:08, Sun, Zhongdong wrote:
Hi Vladimir,
Thanks for your quick response.
As I understand, the apostrophe or single quote will be converted to
*'* with the PHP function htmlspecialchars because it’s considered
as a special character. See this: PHP: htmlspecialchars - Manual
<https://www.php.net/htmlspecialchars>. Later, we can convert it back
with function htmlspecialchars_decode if needed. I search the folder
/usr/share/ganglia and find a lot of instances of htmlspecialchars but
don’t know which one cause this problem. I’m not familiar with Ganglia
and don’t know how to debug further. This seems to happen in many
Rocky 8.4 machines, all are fresh installed. The ganglia-web version
is 3.7.5-40. Could you please provide more advice how to debug this?
Thanks.
Zhongdong
*From:*Vladimir Vuksan <[email protected]>
*Sent:* Thursday, February 15, 2024 10:56 AM
*To:* [email protected]
*Subject:* Re: [Ganglia-general] stacked graph not working
It looks like a command line arguments encoding issue somewhere around
here
https://github.com/ganglia/ganglia-web/blob/master/functions.php#L1410
Not sure why apostrophe is being replaced with '. That's breaking
the rrdtool invocation. You will need to investigate how to change
that behavior.
Vladimir
On 2/14/24 12:19, Sun, Zhongdong wrote:
Hi everyone,
We just installed a new instance of Ganglia on Rocky OS 8.4.
Everything works well except the stacked graph doesn’t show up. I
searched this forum and found a few similar cases. For example,
Janet reported this issue in 2021, but in a CentOS 7 system.
Vladimir provided some solution but didn’t work in Rocky 8 system.
I also following some instructions for debug. Copied the address
of the stacked graph and appended ‘&debug=5’, which produced a
command like this.
/usr/bin/rrdtool graph - -E --start \&\#039\;-3600s\&\#039\;
--end \&\#039\;N\&\#039\; --width 700 --height 300 --title
\&\#039\; aggregated load_one last hour\&\#039\; --upper-limit
\&\#039\;0\&\#039\; --lower-limit \&\#039\;0\&\#039\; CDEF:total=0
CDEF:mean=total,0,/ CDEF:last_total=total,POP,0
CDEF:last_mean=last_total,0,/ COMMENT:'\j'
GPRINT:'total':AVERAGE:'Avg Total\: %5.2lf'
GPRINT:'last_total':LAST:'Current Total\: %5.2lf\c'
GPRINT:'mean':AVERAGE:'Avg Average\: %5.2lf'
GPRINT:'last_mean':AVERAGE:'Current Average\: %5.2lf\c'
When I ran this command in the machine, I got this result.
ERROR: start time: unparsable time: &'-3600s'
Does anyone know what can cause this? It seems a bug in
stacked.php or relative program, but I’m not familiar with this
and cannot figure it out.
By the way, we have been using Ganglia for a long time. It works
perfectly in CentOS 7. But we have to upgrade CentOS 7 since it’s
near end-of-life.
Any help would be appreciated.
Zhongdong
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