Cacti 0.8.8a / CentOS 6.4 / ERROR: opening '/usr/share/cacti/rra/*.rrd': No such file or directory - cacti

Question

I've just installed Cacti 0.8.8a from EPEL repo of CentOS 6.4. Everything is fine except the graphs do not show up. I checked the log of httpd then I see:
ERROR: opening '/usr/share/cacti/rra/localhost_mem_buffers_3.rrd': No such file or directory
ERROR: opening '/usr/share/cacti/rra/localhost_proc_7.rrd': No such file or directory
ERROR: opening '/usr/share/cacti/rra/localhost_users_6.rrd': No such file or directory
ERROR: opening '/usr/share/cacti/rra/localhost_load_1min_5.rrd': No such file or directory
Seems like rrdtool did not generate those files.
This is in /usr/share/cacti
ls -ls /usr/share/cacti
total 872
8 -rw-r--r-- 1 root root 5945 Jun 28 2012 about.php
8 -rw-r--r-- 1 root root 5348 Jun 28 2012 auth_changepassword.php
16 -rw-r--r-- 1 root root 14288 Jun 28 2012 auth_login.php
24 -rw-r--r-- 1 root root 21658 Jun 28 2012 cdef.php
0 lrwxrwxrwx 1 root root 18 Jul 25 13:42 cli -> /var/lib/cacti/cli
28 -rwxr-xr-x 1 root root 26620 Jun 28 2012 cmd.php
8 -rw-r--r-- 1 root root 6974 Jun 28 2012 color.php
28 -rw-r--r-- 1 root root 25068 Jun 28 2012 data_input.php
36 -rw-r--r-- 1 root root 35505 Jun 28 2012 data_queries.php
60 -rw-r--r-- 1 root root 60117 Jun 28 2012 data_sources.php
36 -rw-r--r-- 1 root root 32920 Jun 28 2012 data_templates.php
8 -rw-r--r-- 1 root root 6107 Jun 28 2012 gprint_presets.php
4 -rw-r--r-- 1 root root 3657 Jun 28 2012 graph_image.php
16 -rw-r--r-- 1 root root 13469 Jun 28 2012 graph.php
12 -rw-r--r-- 1 root root 9208 Jun 28 2012 graph_settings.php
20 -rw-r--r-- 1 root root 17426 Jun 28 2012 graphs_items.php
40 -rw-r--r-- 1 root root 40166 Jun 28 2012 graphs_new.php
60 -rw-r--r-- 1 root root 60571 Jun 28 2012 graphs.php
12 -rw-r--r-- 1 root root 10006 Jun 28 2012 graph_templates_inputs.php
20 -rw-r--r-- 1 root root 18542 Jun 28 2012 graph_templates_items.php
28 -rw-r--r-- 1 root root 26703 Jun 28 2012 graph_templates.php
40 -rw-r--r-- 1 root root 40313 Jun 28 2012 graph_view.php
8 -rw-r--r-- 1 root root 6022 Jun 28 2012 graph_xport.php
60 -rw-r--r-- 1 root root 60031 Jun 28 2012 host.php
20 -rw-r--r-- 1 root root 20031 Jun 28 2012 host_templates.php
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 images
4 drwxr-xr-x 4 cacti root 4096 Jul 25 13:50 include
4 -rw-r--r-- 1 root root 2313 Jun 28 2012 index.php
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 install
4 drwxr-xr-x 3 root root 4096 Jul 25 13:42 lib
0 lrwxrwxrwx 1 root root 15 Jul 25 13:42 log -> /var/log/cacti/
4 -rw-r--r-- 1 root root 2838 Jun 28 2012 logout.php
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 plugins
28 -rw-r--r-- 1 root root 27362 Jun 28 2012 plugins.php
8 -rw-r--r-- 1 root root 4310 Jun 28 2012 poller_commands.php
4 -rw-r--r-- 1 root root 2243 Jun 28 2012 poller_export.php
20 -rwxr-xr-x 1 root root 18056 Jun 28 2012 poller.php
4 drwxr-xr-x 5 root root 4096 Jul 25 13:42 resource
**0 lrwxrwxrwx 1 cacti cacti 18 Jul 25 13:42 rra -> /var/lib/cacti/rra**
8 -rw-r--r-- 1 root root 7394 Jun 28 2012 rra.php
0 lrwxrwxrwx 1 root root 22 Jul 25 13:42 scripts -> /var/lib/cacti/scripts
12 -rw-r--r-- 1 root root 10820 Jun 28 2012 script_server.php
8 -rw-r--r-- 1 root root 5761 Jun 28 2012 settings.php
4 -rw-r--r-- 1 root root 1407 Jun 3 2012 snmpv3_priv_proto_none.patch
8 -rw-r--r-- 1 root root 6345 Jun 28 2012 templates_export.php
8 -rw-r--r-- 1 root root 5835 Jun 28 2012 templates_import.php
20 -rw-r--r-- 1 root root 19529 Jun 28 2012 tree.php
44 -rw-r--r-- 1 root root 44997 Jun 28 2012 user_admin.php
68 -rw-r--r-- 1 root root 65635 Jun 28 2012 utilities.php
I also changed the owner of rra folder to cacti user like this:
ls -ls /var/lib/cacti/
total 12
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 cli
0 lrwxrwxrwx 1 root root 24 Jul 25 13:42 include -> /usr/share/cacti/include
0 lrwxrwxrwx 1 cacti root 20 Jul 25 13:42 lib -> /usr/share/cacti/lib
**4 drwxr-xr-x 2 cacti cacti 4096 Jun 28 2012 rra**
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 scripts
What should I do next?
Thanks a lot!

Answer 1

What worked for me was to go into System Utilities (bottom of console) and click on Rebuild Poller Cache.

Answer 2

The most common case of a missing RRD file in Cacti is a data source problem.
This probably means that the Cacti poller could not retrieve data from the host.
Check the status of the device in the device list, if it's "Unknown" and if you didn't fiddle around with the availability detection, it means that Cacti is unable to get an SNMP reply from the host. This could have different reasons:
Check SNMP connectivity between the Cacti host and the polled host (in your case, since both sides are the Cacti host, make sure snmpd is running and listening on the same port Cacti is trying to reach it (default 161).
Check the community string on both ends
if DNS is used make sure resolving is possible and successful on the Cacti host (less relevant for localhost, but still a good idea imho).
Check the datasource using debug mode to get some extra info (Devices ›› Localhost ›› Data Source List ›› Localhost - Logged in Users ›› Turn On Data Source Debug Mode) and also try to poll the host using snmpget or snmpwalk:
snmpget -cCOMMUNITY -vVERSION HOSTNAME OID
I usually use snmpwalk which uses the same syntax:
snmpwalk -cpublic -v2c localhost 1.3.6.1.2.1
1.3.6.1.2.1 is for MIB-2
Further debugging help: Great guide by gandalf from the Cacti forums
Cacti forums, where you can try and post your question there.
Good luck!

Answer 3

Check your permissions. I had the same issue when I stood up a cacti instance on Debian. Everything was displaying correctly except for the graphs, and I had the same "No such file or directory" errors. Changing the ownership of the rra directory to cacti:www-data resolved the issue for me.
Good luck.