Currently I have install Graylog v 2.2.2 and I need to upgrade the server with Graylog v 2.3.1.
But I do not want to interrupt the Graylog Services.
Can I upgrade it without interruption ?
No, unfortunately a rolling upgrade from Graylog 2.2.x to Graylog 2.3.x is not supported.
You need to shut down your Graylog nodes, upgrade Graylog, and then (beginning with the primary node) start Graylog again and check the logs for errors.
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