Graylog suddenly ceased to work

Suddenly, after just adding memory (64 to 128 Gb) to server, Graylog ceased to work.

It’s a relatively fresh installation, no legacy, just elasticsearch upgraded 6.8.6 to 6.8.10 about three weeks ago without any trouble.

Now, graylog issues

2020-08-10 21:52:53,198 ERROR o.g.p.v.s.d.SearchesCleanUpJob [scheduled-0] Uncaught exception in periodical

java.lang.RuntimeException: IOException encountered while reading from a byte array input stream
at ~[graylog.jar:?]

Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field “type” (class$AutoValue_ViewDTO$Builder), not marked as ignorable (11 known properties: “state”, “search_id”, “owner”, “summary”, “title”, “_id”, “description”, “requires”, “properties”, “dashboard_state”, “created_at”])
at [Source:; pos: 37] (through reference chain:$AutoValue_ViewDTO$Builder[“type”])

After that, all API calls results in timeout. Elasticsearch cluster is green, plenty of memory, disks are not loaded, CPU is not loaded.


I’d never could imagine the cause, or calculate it from log messages.

I’ve got my /etc/resolv.conf garbled, and resolving was not available. Fixing resolv.conf fixed a problem at once.

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