Interesting PHP fucntion to help in debugging cacti

[Didier]

Hi all

I have found an interesting PHP function to help in debugging cacti when things goes wrong. It is the debug_backtrace fucntion.
Below is an example of results and where I have put this command to get those results


a) After putting var_dump(debug_backtrace()); in rrd.php I have played
c:\php\php.exe c:\apache2\htdocs\cacti\poller.php

The results below show the folloing fucntion has been called

["function"]=> string(15) "rrdtool_execute"
in ["file"]=> c:\apache2\htdocs\cacti\lib\rrd.php"
line ["line"]=> int(291)
.......

b) In graph mangement when debug is turn on you also have some trace

c) The ideal would be to direct the result in a file, but I know yet how to do it very easily



--------------------------------------------------------------------------------
in rrd.php - rrdtool_execute function - I have put the fucntion has shown below
---------------------------------------------

/* if we want to see the error output from rrdtool; make sure to specify this */
if (($output_flag == RRDTOOL_OUTPUT_STDERR) && (empty($rrd_struc["using_proc_open"]))) {
$command_line .= " 2>&1";
}
var_dump(debug_backtrace()); /*********************************/
/* use popen to eliminate the zombie issue */


--------------------------------------------------------------------------------

************ For an update of the rrd here th results **********************


C:\Documents and Settings\Didier>c:\php\php.exe c:\apache2\htdocs\cacti\poller.p
hp
Content-type: text/html
X-Powered-By: PHP/4.3.7

08/24/2004 10:29:09 PM - POLLER: Poller[0] DEBUG: About to Spawn a Remote Proces
s
Waiting on 1/1 pollers.
08/24/2004 10:29:10 PM - POLLER: Poller[0] RRD: c:/rrdtool/rrdtool.exe update C:
\apache2\htdocs\cacti\rra\localhost_myds2_1001.rrd --template myds2 1093379350:1
36
array(3) {
[0]=>
array(4) {
["file"]=>
string(35) "c:\apache2\htdocs\cacti\lib\rrd.php"
["line"]=>
int(291)
["function"]=>
string(15) "rrdtool_execute"
["args"]=>
array(5) {
[0]=>
&string(91) "update C:\apache2\htdocs\cacti\rra\localhost_myds2_1001.rrd -
-template myds2 1093379350:136"
[1]=>
&bool(true)
[2]=>
&int(1)
[3]=>
&array(3) {
["fd"]=>
resource(37) of type (process)
["pipes"]=>
array(3) {
[0]=>
resource(34) of type (stream)
[1]=>
resource(35) of type (stream)
[2]=>
resource(36) of type (stream)
}
["using_proc_open"]=>
bool(true)
}
[4]=>
&string(6) "POLLER"
}
}
[1]=>
array(4) {
["file"]=>
string(3 "c:\apache2\htdocs\cacti\lib\poller.php"
["line"]=>
int(239)
["function"]=>
string(23) "rrdtool_function_update"
["args"]=>
array(2) {
[0]=>
&array(1) {
["C:\apache2\htdocs\cacti\rra\localhost_myds2_1001.rrd"]=>
array(3) {
["time"]=>
int(1093379350)
["local_data_id"]=>
string(4) "1001"
["items"]=>
array(1) {
["myds2"]=>
string(3) "136"
}
}
}
[1]=>
&array(3) {
["fd"]=>
resource(37) of type (process)
["pipes"]=>
array(3) {
[0]=>
resource(34) of type (stream)
[1]=>
resource(35) of type (stream)
[2]=>
resource(36) of type (stream)
}
["using_proc_open"]=>
bool(true)
}
}
}
[2]=>
array(4) {
["file"]=>
string(34) "c:\apache2\htdocs\cacti\poller.php"
["line"]=>
int(150)
["function"]=>
string(21) "process_poller_output"
["args"]=>
array(1) {
[0]=>
&array(3) {
["fd"]=>
resource(37) of type (process)
["pipes"]=>
array(3) {
[0]=>
resource(34) of type (stream)
[1]=>
resource(35) of type (stream)
[2]=>
resource(36) of type (stream)
}
["using_proc_open"]=>
bool(true)
}
}
}
}
08/24/2004 10:29:10 PM - SYSTEM STATS: Time: 1.0738 s, Method: cmd.php, Processe
s: 1, Threads: N/A, Hosts: 1, Hosts/Process: 1