poller.php runtime exceeded

[cabletron]

hi ,all
when i run the command at shell:

[root@cacti]# php poller.php
07/12/2007 03:31:03 PM - POLLER: Poller[0] Maximum runtime of 292 seconds exceeded. Exiting.
07/12/2007 03:31:03 PM - SYSTEM STATS: Time:292.7414 Method:cmd.php Processes:1 Threads:N/A Hosts:2 HostsPerProcess:2 DataSources:1 RRDsProcessed:0
PHP Warning: pclose(): 48 is not a valid stream resource in /usr/local/apache2/htdocs/monitor/lib/rrd.php on line 48

please help me,what is happened? and how to resolve it?

[gandalf]

Please report your cacti version and make sure it is fully patched
Reinhard