mcdarren / rrdtool-merge Goto Github PK

An error that appeared while I have launched the script:

Can't call method "text" on an undefined value at rrdtool-merge.pl line 61

I could fix it and finally run the script thanks to Claude I. D. at webpage http://w3facility.org/question/merge-multiple-rrds-over-time/

The solution was replacing in line 61 this code:

 my $xff         = $new_rra->first_child( 'xff' )->text;

with this one:

 my $xff         = $new_rra->first_child_text( 'xff' );

Claude I. D. derived this solution from XML::Twig documentation which says this:

first_child_text ($optional_condition)
Return the text of the first child of the element, or the first child
matching the $optional_condition If there is no first_child then returns ''. This
avoids getting the child, checking for its existence then getting the text for trivial
cases.

Many thanks to Darren Murphy for nice script and Claude I. D.! for his post I was able to merge all rrd files that I needed.

I hope that it would help also to the others.

i am recieving error below

perl rrdtool-merge.pl --oldrrd=/var/lib/cacti/rra/fezziwig_-terminal_server_hdd_used_510.rrd --newrrd=/var/lib/cacti/rra/fezziwig-terminal_server_hdd_used_509.rrd
Dumping /var/lib/cacti/rra/fezziwig-terminal_server_hdd_used_510.rrd to XML: /tmp/fezziwig-terminal_server_hdd_used_510.rrd_old_4480.xml
Dumping /var/lib/cacti/rra/fezziwig-terminal_server_hdd_used_509.rrd to XML: /tmp/fezziwig-terminal_server_hdd_used_509.rrd_new_4480.xml
Parsing /var/lib/cacti/rra/fezziwig-terminal_server_hdd_used_510.rrd XML......parsing completed
Parsing /var/lib/cacti/rra/fezziwig-_terminal_server_hdd_used_509.rrd XML...
Last Update: 1433871327
Start processing Round Robin DB
CF : AVERAGE
Pdp x Row : 1
Start processing DB rows
Finished processing DB rows
Start processing DB rows
Finished processing DB rows
Start processing Round Robin DB
CF : AVERAGE
Pdp x Row : 1
Start processing DB rows
Finished processing DB rows
Start processing DB rows
Finished processing DB rows
Start processing Round Robin DB
CF : AVERAGE
Pdp x Row : 6
Start processing DB rows
Finished processing DB rows
Start processing Round Robin DB
CF : AVERAGE
Pdp x Row : 24
Start processing DB rows
Finished processing DB rows
Start processing Round Robin DB
CF : AVERAGE
Pdp x Row : 288
Start processing DB rows
Finished processing DB rows
Start processing Round Robin DB
CF : MAX
Pdp x Row : 1
Start processing DB rows
Finished processing DB rows
Start processing DB rows
Finished processing DB rows
Start processing Round Robin DB
CF : MAX
Pdp x Row : 1
Start processing DB rows
Finished processing DB rows
Start processing DB rows
Finished processing DB rows
Start processing Round Robin DB
CF : MAX
Pdp x Row : 6
Start processing DB rows
Finished processing DB rows
Start processing Round Robin DB
CF : MAX
Pdp x Row : 24
Start processing DB rows
Finished processing DB rows
Start processing Round Robin DB
CF : MAX
Pdp x Row : 288
Start processing DB rows
Finished processing DB rows
Start processing header
DB Service Name: hdd_used
Finished updating header
...parsing completed
Outputing to
Restoring from XML to RRD:
ERROR: usage rrdtool restore [--range-check/-r] [--force-overwrite/-f] file.xml file.rrd
File clean up
Processing complete. It took 7 seconds