SNMP Get Timeout for Host after add some graph template

[stalker86]

in cacti i graph some graph with generic snm data - extend scripts on net-snmpd. OID like NET-SNMP-EXTEND-MIB::nsExtendOutLine.\"mysqlcnt\".1
(in snmpd.conf extend mysqlcnt "/usr/local/scripts/mysqlcnt.sh")

after I add http://forums.cacti.net/about8777.html grapj for disk io (bytes. writes/reads) the my graphics is broke with message CMDPHP: Poller[0] WARNING: SNMP Get Timeout for Host:'192.168.0.7', and OID:'NET-SNMP-EXTEND-MIB::nsExtendOutLine.\"mysqlcnt\".1' in cacti.log

but snmpget from this host work fine
time snmpget -v3 -l authPriv -u cthulhu -a MD5 -A NDlORaVzl5J4 -x DES -X Uyz2uHHZzg3A 192.168.0.7 NET-SNMP-EXTEND-MIB::nsExtendOutLine.\"mysqlcnt\".1
NET-SNMP-EXTEND-MIB::nsExtendOutLine."mysqlcnt".1 = STRING: 89

real 0m0.082s
user 0m0.056s
sys 0m0.000s


change timeout in host options not solve.

how to debug this trouble?
use poller.php from cron cati is

Cacti Version 0.8.8b
Cacti OS unix
SNMP Version NET-SNMP version: 5.4.3
RRDTool Version RRDTool 1.4.x
Hosts 17
Graphs 358
Data Sources SNMP: 169
SNMP Query: 145
Script Query - Script Server: 139
Total: 453

[stalker86]

remove graph from http://forums.cacti.net/about8777.html not solve. recreate graph no help too

[stalker86]

replace oid witn numeric representation and rebuild poller cache is fixed problem