Updating the TIME_WAIT on the server seems to fixed the issue as per https://support.solarwinds.com/Success_Center/Server_Application_Monitor_(SAM)/Knowledgebase_Articles/Application_monitor_using_port_443_periodically_goes_down
Thank you Damian -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
