Set fielddata=true on [event.dataset]

Elastic Stack Kibana
1

Hello,

We are using the ELK Stack 7.3.1.
Since a few days when I try to enter "Stack Monitoring" within Kibana I get the following error message:

[illegal_argument_exception] Fielddata is disabled on text fields by default. Set fielddata=true on [event.dataset] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.: Check the Elasticsearch Monitoring cluster network connection or the load level of the nodes.

And the "display" keeps blank.
When I change the URL (because the browser knows and suggests the URL) to http://server:5601/app/monitoring#/elasticsearch/nodes?_g=(cluster_uuid:'-_u6G2UAT_qNx45Du-tKUA')
I can have a look at the nodes & indices.

I already restartet Kibana, deleted the .kibana index - except that I lost some configuration within Kibana nothing positiv in terms of solution happend.

Can you please give me a hint what could be wrong.

Thanks in advance & BR

2

https://www.elastic.co/guide/en/elasticsearch/reference/current/fielddata.html

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