cacti的rra目录下无内容

c0053

执行snmpget -v 2c -c public 127.0.0.1 .1.3.6.1.4.1.2021.11.52.0命令
得到 ：UCD-SNMP-MIB::ssCpuRawSystem.0 = Counter32: 6132
这说明正确取到数据了吧？
chmod 777 rra
使所有用户对rra目录拥有所有权限
执行netstat -anl |grep 161命令
得到　：udp        0      0 0.0.0.0:161             0.0.0.0:*

但是在rra目录下仍然没有内容，请问这是什么原因。
谢谢。

c0053

在执行命令 /usr/local/httpd/php/bin/php /var/www/html/cacti/poller.php
后，出现以下错误信息：
PHP Warning:  shell_exec() has been disabled for security reasons in /var/www/html/cacti/lib/poller.php on line 51
PHP Warning:  shell_exec() has been disabled for security reasons in /var/www/html/cacti/lib/poller.php on line 51
PHP Warning:  shell_exec() has been disabled for security reasons in /var/www/html/cacti/lib/poller.php on line 51
PHP Warning:  shell_exec() has been disabled for security reasons in /var/www/html/cacti/lib/poller.php on line 51
PHP Warning:  shell_exec() has been disabled for security reasons in /var/www/html/cacti/lib/poller.php on line 51
PHP Warning:  popen() has been disabled for security reasons in /var/www/html/cacti/lib/rrd.php on line 41
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
PHP Warning:  fwrite(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 89
PHP Warning:  fflush(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 90
08/12/2006 03:23:24 AM - SYSTEM STATS: Time:1.0626 Method:cmd.php Processes:1 Threads:N/A Hosts:2 HostsPerProcess:2 DataSources:5 RRDsProcessed:5
PHP Warning:  pclose(): supplied argument is not a valid stream resource in /var/www/html/cacti/lib/rrd.php on line 48
[cactiuser@localhost cacti]$ Timeout: No Response from 127.0.0.1:161



请问是何原因，谢谢。