定时任务 不执行

[root@hadoop2 spider]# ps -ef|grep crond
root 32420 28821 0 09:41 pts/2 00:00:00 grep crond
[root@hadoop2 spider]# service crond start
Starting crond: [ OK ]
[root@hadoop2 spider]# ps -ef|grep crond
root 32437 1 0 09:41 ? 00:00:00 crond
root 32440 28821 0 09:41 pts/2 00:00:00 grep crond
[root@hadoop2 spider]#