Cannot find the "data" array in the received JSON object.

[magicker]

Hi all,

I finally give in and have resorted the asking.

I have set up 20ish server so far.

Out of the 20 only two are showing file system checks / network info from the Linux Servers Template.

The others are all showing

Cannot find the "data" array in the received JSON object.

as far as I can tell they are all set up the same

They all show the other tests

the firewalls are all configured the same

the clients are a mix of ubuntu 14.04 and 16.04

The two taht work are 14.04 clients but I dont that that is relevent.

Can anyone help me troubleshoot this

debus on one server states

16630:20190405:200507.765 Sending back [[{"{#FSNAME}":"/sys","{#FSTYPE}":"sysfs"},{"{#FSNAME}":"/proc","{#FSTYPE}":"proc"},{"{#FSNAME}":"/dev","{#FSTYPE}":"devtmpfs"},{"{#FSNAME}":"/dev/pts","{#FSTYPE}":"devpts"},{"{#FSNAME}":"/run","{#FSTYPE}":"tmpfs"},{"{#FSNAME}":"/","{#FSTYPE}":"ext4"},{"{#FSNAME}":"/sys/fs/cgroup","{#FSTYPE}":"tmpfs"},{"{#FSNAME}":"/sys/fs/fuse/connections","{#FSTYPE}":"fusectl"},{"{#FSNAME}":"/sys/kernel/debug","{#FSTYPE}":"debugfs"},{"{#FSNAME}":"/sys/kernel/security","{#FSTYPE}":"securityfs"},{"{#FSNAME}":"/run/lock","{#FSTYPE}":"tmpfs"},{"{#FSNAME}":"/run/shm","{#FSTYPE}":"tmpfs"},{"{#FSNAME}":"/run/user","{#FSTYPE}":"tmpfs"},{"{#FSNAME}":"/sys/fs/pstore","{#FSTYPE}":"pstore"},{"{#FSNAME}":"/boot","{#FSTYPE}":"ext4"},{"{#FSNAME}":"/backup","{#FSTYPE}":"ext4"},{"{#FSNAME}":"/sys/fs/cgroup/systemd","{#FSTYPE}":"cgroup"}]]

so that looks like it should be working..

but no data seems to make it to the server. The hosts just show:

Status not supported | Cannot find the "data" array in the received JSON object.

zabbix_server (Zabbix) 4.0.6

zabbix_agentd (daemon) (Zabbix) 4.2.0

[vso]

Please use agent 4.06 or upgrade zabbix server to 4.2.0

[magicker]

Good grief!! as simple as that
As there were 20 agents out there I went for the upgrade server option.

Once upgraded the missing data started to flow in perfectly

THANK YOU!!!

[ryanjenson90]

thank you so much.
Was facing a similar issue.
now it's a grief cause this seems simple. i read a similar article on https://techyhost.com/free-data-monitoring-apps/ for this
hope this community grows in this wonderful pattern.

[gbiondi]

Hi,

resolved with 'upgrade' zabbix server from 4.0.3 to 4.2.1
Thanks a lot.

gb

[DCEM]

Hello, I had the same error today:

"Cannot find the data array in the received JSON object."

I did use the most recent ZABBIX version, but the issue was different - and powershell related.

After quiet a while I noticed that the problem only arrose when there was only one object in the JSON

So if I use this Powershell command to produce the example data:
convertto-JSON(@{'location' = 'data1'},@{'location' = 'data2'})
it will work fine.

But with only one item it wont work:
convertto-JSON(@{'location' = 'data1'})

The issue seems to be that the convertto-JSON will only create an array if it is needed.
so the output of example 1 is:
[
{
"location": "data1"
},
{
"location": "data2"
}
]

and the one of example 2 is:
{
"location": "data1"
}

I'm not sure if ZABBIX or powershell is to blame, but the solution or workarround is quite simple:
just make sure it is an Array in powershell before you do the JSON conversion:
convertto-JSON(@(@{'location' = 'data1'}))
convertto-JSON(@(@{'location' = 'data1'},@{'location' = 'data2'}))

will both work fine

so insted of convertto-JSON( ) use convertto-JSON(@( ))

The biggest issue why it took me so long to find this was the error-message and the different powershell behaviour.
Searching arround i got the impresion that the data must *actually* be named "data" (JSON: {"data": ...

I don't know if there is a best practice here but trying it didn't help at first:
convertto-JSON(@{'data' = @{'location' = 'data1'}})
will output:
{
"data": {
"location": "data1"
}
}

So the important part of the errormessage is the "array"

I tought sharing might help somone with a similar issue.
Also updating the documentation might help - a hint for powershell users...

Greetings