When I call API to the metadata on mongodb, It worked.But when I call API to the data on elastichsearch, It allway reply is "{
“type”: “ApiError”,
“message”: “No Server is assigned to client to connect”
}"
My elasticsearch cluster version is stiill 5.5.1 with my old graylog cluster version 2.3.1.
Is this error cause of old elasticsearch version???
I found error cause of enable option “elasticsearch_discovery_filter = rack:42”. I disabled it, then It worked.
And should I upgrade elasticsearch v5.5 t v5.6?