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Hello. I had created a graylog cluster for the testing purposes in the Kubernetes cluster via helm chart, but after one week I noticed that sometimes Graylog has some problems with (i thought) mongodb connection.
This task is almost the same as

In logs i can see

 INFO    [cluster] - Exception in monitor thread while connecting to server mongodb-mongodb-replicaset-2.mongodb-mongodb-replicaset.graylog.svc.cluster.local:27017 - {}
com.mongodb.MongoSocketOpenException: Exception opening socket
	at com.mongodb.connection.SocketStream.open(SocketStream.java:62) ~[graylog.jar:?]

I read , that it can be connected with Java options (something connected with dns)
Thank you for your help.

also i tried with external mongodb database, and i have the same result.

I’ve downscaled numbers of node to 1 node, and it works without any problems. I think this problem is connected with Nginx ingress controller. Maybe we have to use some ingress options like ‘stickiness’.

sessionAffinity: ClientIP
    timeoutSeconds: 10000

I added this into the web-graylog service config and it resolved my problems. But I don’t know how it worked without this flag.

You might get better/more help with the helm chart in that community? I do not know how many of the users here use that helm chart and work with that.

I would be glad to help, but i was surprised that nobody faced with this problem , and i assumed that it helped only me. Of course i will try to help with helm chart on Saturday.


I guess that they did not share their findings if they run into the same issues…

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