Re: [Ganglia-general] stacked graph not working

[Vladimir Vuksan]

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 
. 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 
*Sent:* Thursday, February 15, 2024 10:56 AM
*To:* ganglia-general@lists.sourceforge.net
*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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Re: [Ganglia-general] stacked graph not working

[Sun, Zhongdong]

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. 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 
Sent: Thursday, February 15, 2024 10:56 AM
To: ganglia-general@lists.sourceforge.net
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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Re: [Ganglia-general] stacked graph not working

[Vladimir Vuksan]

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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