External command execution problem (1.4)

[flycat]

In e Zabbix 1.4 I have problem with external command executin. There is Server's log file:

16714:20070609:154806 Got empty string from [-url-linux] IP [127.0.0.1] Parameter [system.psaxo]
 16714:20070609:154806 Assuming that agent dropped connection because of access permissions
 16714:20070609:154806 Host [-url-linux] will be checked after 60 seconds

/etc/zabbix/zabbix_agentd.conf:

...
UserParameter=system.psaxo,/bin/ps axo stat,pcpu,vsize,rss,ppid,pid,cmd k stat,-pcpu
...

I may to do on agent:

observer:/opt/zabbix/plugins # su zabbix
zabbix@observer:~/plugins> /bin/ps axo stat,pcpu,vsize,rss,ppid,pid,cmd k stat,-pcpu
STAT %CPU    VSZ   RSS  PPID   PID CMD
Ds    0.5  21300 12800 16645 16713 postgres: zabbix zabbix [local] INSERT
R+    0.0   2168   828  6508  6528 /bin/ps axo stat,pcpu,vsize,rss,ppid,pid,cmd k stat,-pcpu
Ss    0.7  21300 12796 16645 16691 postgres: zabbix zabbix [local] idle
Ss    0.6  21300 12796 16645 16699 postgres: zabbix zabbix [local] idle
Ss    0.6  21300 12804 16645 16716 postgres: zabbix zabbix [local] idle
Ss    0.6  21300 12788 16645 16715 postgres: zabbix zabbix [local] UPDATE
Ss    0.5  21412 12912 16645 16700 postgres: zabbix zabbix [local] idle
...

What is it? I haven't this on 1.3.8

[tronite]

Perhaps the version of your kernel is behind? I don't know but that is just my 2 pense.

[flycat]

uname -a
Linux observer 2.6.16.21-0.8-smp #1 SMP Mon Jul 3 18:25:39 UTC 2006 i686 i686 i386 GNU/Linux

[tronite]

uname -a
Linux observer 2.6.16.21-0.8-smp #1 SMP Mon Jul 3 18:25:39 UTC 2006 i686 i686 i386 GNU/Linux

The latest stable version of the Linux kernel is: 2.6.21.4 2007-06-07 21:50 UTC

[flycat]

But kernel's version doesn't change!
Zabbix 1.3.8 upgraded to 1.4 only.