Error message after upgrade 1.6.1 to 1.6.2 in Agent

[mlange]

zabbix_agentd.log:

25917:20090120:110610 Can't open jason object
25917:20090120:110810 Can't open jason object
25917:20090120:111010 Can't open jason object
25917:20090120:111210 Can't open jason object
25917:20090120:111410 Can't open jason object
25917:20090120:111610 Can't open jason object
25917:20090120:111810 Can't open jason object
25917:20090120:112010 Can't open jason object
25917:20090120:112210 Can't open jason object
25917:20090120:112410 Can't open jason object

[NomenNescio]

I'm getting this error too.

I'm running zabbix on Ubuntu in vmware, I currently have 3 virtual machines, 1 zabbix server and 3 agents.

two of my agents are getting this "can't open jason object" error in their logs but one of my agents, the one which is running on the same machine the zabbix server & LAMP is running isn't getting any errors.

Both the server and agents are 1.6.2

hope it helps.

[ataylo13]

I am getting the same error. The host giving me the error is on a proxy server. The proxy is version 1.6.2 and I have tried the 1.6.1 agent and the 1.6.2 agent. I am only getting the jason errors on active checks. The normal zabbix agent checks are working correctly.

[MrKen]

Just upgraded from 1.6.1 to 1.6.2 today and getting the same error message re: jason.

I did /etc/init.d/zabbix_agentd stop
then ps -ef | grep zabbix and noticed that the agent had not stopped!

I then killed the process and restarted the agent. Everything started running fine and no more jason error messages.

MrKen

[ataylo13]

I verified that the agent was stopped and restarted. I am still seeing the error on active checks through a proxy. I am not seeing on active checks that are connecting directly to the master node.

[NomenNescio]

I think I got it, you have to uncomment Serverport in your agents config file, and set it to the port the server is using. Don't forget to make sure that that port is open on the server.

[ataylo13]

disregard previous posts of mine. The more I dug into I was have dns issues. All is well.

[Alexei]

25917:20090120:110610 Can't open jason object

The warning is slightly misleading. It happens when the agent tries to receive list of active checks from Zabbix server, but the server does not have the host in the database. Check if Hostname is correct in zabbix_agentd.conf.

You may ignore this message.

[zabbix_es]

[zabbix-1.6.2] problem with active checks and jason error.

Hello:
My environment was a zabbix server and local agent with version 1.6.1 and four agents with version 1.6 (no upgraded because issue related to character ',' in UserParameter).
All hosts working properly.
Afther upgrade zabbix server and local agent to 1.6.2, appears this error message in server log:

Send list of active checks to [192.168.1.20] failed: host [myhost.mydomain.com] not found.

and in agent's log of related host:

Can`t open jason object.

Nevertheless, If I ping myhost.mydomain.com it responds without problems, so DNS is OK. An hostname is properly configured in zabbix_agentd.conf.
I tried to upgrade agent from 1.6 to 1.6.2 and this issue persists.
Now I have downgrade agent to 1.6 and issue remains but other three agents work fine. It happens only with one of four agentes.

[oneye]

i have similar problems...

[Alexei]

Just configure Hostname in zabbix_agentd.conf to match host name defined in ZABBIX front-end to make the warning disappear.

[zabbix_es]

[zabbix-1.6.2] problem with active checks and jason error.

I have confirmed that hostname in configuration of zabbix_agent match hostname (DNS) configured in zabbix_server and, in configuration of hosts in server, also is check that server must poll to agents throught DNS instead of IP address.

Furthermore, I din't change any connections or DNS parameters during upgrade and before the upgrade all worked properly.

[MrKen]

As Alexei pointed out, above, it has nothing to do with DNS name.

On you Configuration --> Hosts page, the first three columns are: Name; DNS; IP.

What you need is Name! Then restart your agentd.

MrKen

[zabbix_es]

[zabbix-1.6.2] problem with active checks and jason error.



I had as Name "myhost" and as DNS "myhost.mydom1.mydom2.mydom3".
Afther, put in Name same value I was in DNS it works fine.

Thank you MrKen!.

But, I disagree with this behaviour because I think that Name could be diferent of DNS hostname.
I suposse that is a change included in revision 1.6.2.
Furthermore, I don't undestand why rest of agents (four of five) continuing working fine without changes.

[zabbix_es]

I answer my self:
Instead of putting "myhost.mydom1.mydom2.mydom3" in both fields ("Name" in front-end and "HostName" in agent), in my case, I have changed both to myhost and their also works fine.
I have checked rest of hosts and they have also this configuration so this was the reason because they didn't have any warnings.