Error monitoring Replilcat Set MongoDB

[studero]

Hi,

I have create a Replicat Set of Mongodb with 3 nodes, one Primary and two Secondary. The priority is the same on the 3 nodes.

I configure the monitoring of each node with using the template "MongoDB node by Zabbix agent2.

My Zabbix configuration and version of MongoDB:
Zabbix server : 6.4.12
Zabbix agent2 : 6.4.12 with MongoDB plugins
MongoDB sever : 7.0.6

When I switch to a different node of MongoDB (switch from Primary to one of Secondary), the Zabbix monitoring failed on the following Items:
- MongoDB Number of replicas
- MongoDB: Number of unhealthy replicas
- MongoDB: Unhealthyl replicas
and some other like MongoDB: Preload ...

The error on the Zabbix server is :
2020684:20240315:154226.627 error reason for "svx-lab-04m.unifr.ch:mongodb.rs.total_nodes[ReplicaMGDB]" changed: Preprocessing failed for: {"$clusterTime":{"clusterTime":{"T":1710513744, "I" :1},"signature":{"hash":{"Subtype":0,"Data":"pV...
1. Failed: cannot extract value from json by path "$.members[?(@.self == "true")].totalNodes.first()": no data matches the specified path
2020684:20240315:154226.627 error reason for "svx-lab-04m.unifr.ch:mongodb.rs.unhealthy_count[ReplicaMGDB]" changed: Preprocessing failed for: {"$clusterTime":{"clusterTime":{"T":1710513744, "I" :1},"signature":{"hash":{"Subtype":0,"Data":"pV...
1. Failed: cannot extract value from json by path "$.members[?(@.self == "true")].unhealthyCount.first()": no data matches the specified path
2020684:20240315:154226.639 error reason for "svx-lab-04m.unifr.ch:mongodb.rs.unhealthy[ReplicaMGDB]" changed: Preprocessing failed for: {"$clusterTime":{"clusterTime":{"T":1710513744, "I" :1},"signature":{"hash":{"Subtype":0,"Data":"pV...
1. Failed: cannot extract value from json by path "$.members[?(@.self == "true")].unhealthyNodes.first()": no data matches the specified path

What is wrong ? What I need to configure ?

I need help
Regards
Olivier

[cyber]

cannot extract value from json by path ..... : no data matches the specified path

Your endpoint just does not return things, what you are looking for. If there are discovered items, it can be, that while switching over from primary to secondary, some data is not valid any more, needs rediscovery or something...
I don't know much about mongoDB... just throwing possibilities around...

[studero]

cannot extract value from json by path ..... : no data matches the specified path

Your endpoint just does not return things, what you are looking for. If there are discovered items, it can be, that while switching over from primary to secondary, some data is not valid any more, needs rediscovery or something...
I don't know much about mongoDB... just throwing possibilities around...

Thanks for this explain. After multi tests of switch over node, I think also that is the reason with Zabbix give an error when the Mongo DB replica set with from a primary to a secondary node.