gaps in graphs

[sovtek1971]

Hello

Cacti 0.8.7e on Ubuntu 10.04 RRDtool 1.3.8
I'm getting intermittent gaps in all graphs for all devices/servers on my network except the cacti server. It is at the same time across all devices. I looked for log errors that correspond to the gaps but I'm not sure they are related.
There doesn't seem to be a network problem as I can ping the devices when the gaps appear and there is no dropped packets.

From the logs
01/21/2013 07:24:59 AM - POLLER: Poller[0] Maximum runtime of 298 seconds exceeded. Exiting.
01/21/2013 07:24:59 AM - SYSTEM STATS: Time:299.4400 Method:cmd.php Processes:1 Threads:N/A Hosts:138 HostsPerProcess:138 DataSources:6346 RRDsProcessed:3018
01/21/2013 07:25:02 AM - POLLER: Poller[0] WARNING: Poller Output Table not Empty. Issues Found: 3, Data Sources: (DS[4378]), (DS[4459]), (DS[4461])

01/21/2013 07:30:02 AM - POLLER: Poller[0] WARNING: Poller Output Table not Empty. Issues Found: 4574, Data Sources: mem_buffers(DS[474]), mem_cache(DS[475]), mem_free(DS[476])
, hdd_total(DS[477]), hdd_used(DS[477]), hdd_total(DS[478]), hdd_used(DS[478]), hdd_total(DS[479]), hdd_used(DS[479]), hdd_total(DS[480]), hdd_used(DS[480]), hdd_total(DS[481]),
hdd_used(DS[481]), hdd_total(DS[482]), hdd_used(DS[482]), hdd_total(DS[483]), hdd_used(DS[483]), traffic_in(DS[484]), traffic_out(DS[484]), cpu_nice(DS[485]), cpu_system(DS[486
]), Additional Issues Remain. Only showing first 20

01/21/2013 08:05:01 AM - POLLER: Poller[0] WARNING: Poller Output Table not Empty. Issues Found: 4667, Data Sources: traffic_in(DS[335]), traffic_out(DS[335]), cpu_nice(DS[354]
), cpu_system(DS[355]), cpu_user(DS[356]), load_1min(DS[357]), load_15min(DS[358]), load_5min(DS[359]), mem_buffers(DS[360]), mem_cache(DS[361]), mem_free(DS[362]), hdd_total(DS
[363]), hdd_used(DS[363]), hdd_total(DS[364]), hdd_used(DS[364]), hdd_total(DS[365]), hdd_used(DS[365]), hdd_total(DS[366]), hdd_used(DS[366]), hdd_total(DS[367]), hdd_used(DS[3
67]), Additional Issues Remain. Only showing first 20

[sovtek1971]

php -v

PHP 5.3.2-1ubuntu4.15 with Suhosin-Patch (cli) (built: May 4 2012 00:38:26)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies

php -m
[PHP Modules]
bcmath
bz2
calendar
Core
ctype
date
dba
dom
ereg
exif
fileinfo
filter
ftp
gd
gettext
hash
iconv
json
ldap
libxml
mbstring
mhash
mysql
mysqli
openssl
pcntl
pcre
PDO
pdo_mysql
Phar
posix
readline
Reflection
session
shmop
SimpleXML
snmp
soap
sockets
SPL
standard
sysvmsg
sysvsem
sysvshm
tokenizer
wddx
xml
xmlreader
xmlwriter
zip
zlib

[Zend Modules]

[zentec]

Your network isn't the problem, you are running out of time on your poller cycle.

POLLER: Poller[0] Maximum runtime of 298 seconds exceeded. Exiting

Appears you are using cmd.php, have you tried using Spine?

[sovtek1971]

I am using cmd.php like you said. I looked into changing to spine although I've seen some people have problems after changing over. I'm using this cacti server as monitoring for a production environment so I have to test that change first.
I noticed that I'm getting that poller error even when there are no gaps in the graphs. I haven't had any gaps in graphs the past 12 hours and I get that error quite often

01/22/2013 03:09:55 PM - PHPSVR: Poller[0] Maximum runtime of 292 seconds exceeded for the Script Server. Exiting.

I'll let ye know how I get on after the spine change.

Thanks

[sovtek1971]

Sorry I just realized thats not exactly the same error but after double checking again I do indeed have the same error several times throughout today and I have no graph gaps today.

01/22/2013 02:20:00 PM - POLLER: Poller[0] Maximum runtime of 298 seconds exceeded. Exiting.

[phalek]

Well, the graph gaps do not appear in all graphs, but at the ones which would have been processed at the very end of that polling cycle.
You may want to check all of your graphs for gaps.