[xwiki-devs] Activating Wiki on a single host in fleet clears security cache for entire fleet

Hi, we noticed an issue during host activation where a single host being activated would cause all hosts in the fleet to then clear their security cache. Upon investigation, we discovered that this was due to a JGroups message being sent for a DocumentUpdatedEvent. Here is a sample message received by one of the hosts in the fleet: Fri May 11 16:18:04 0995 GMT Wiki -@<host> [DEBUG] <null> (null) Received JGroups remote event [event: [org.xwiki.bridge.event.DocumentUpdatedEvent@16e3c8e3], source: [{docversion=41.1, doclanguage=, origdocversion=41.1, origdoclanguage=, docname=xwiki:XWiki.XWikiServerXwiki}], data: [{contextwiki=xwiki, contextuser=XWiki.XWikiGuest}]], id: <id_here> timestamp: [Fri May 11 16:18:04 UTC 2018] air time: 22 ms RID=, SESSION= XWikiServerXwikiDocumentInitializer's updateDocument() event. As expected, this document update produces the DocumentUpdatedEvent shown above. When the hosts receive this event through JGroups, it triggers [this condition in the DefaultSecurityCacheRulesInvalidator](https://github.com/xwiki/xwiki-platfo…, which then proceeds to remove the 'xwiki' node from the security cache (and everything else in the cache as well since they are all connected to that node). What is the purpose of this update document on initialization and is there any way for us to avoid it? For example, we could perhaps override the DefaultSecurityCacheRulesInvalidatorListener and comment out that condition if there are no major repercussions. Thanks! -- Sent from: http://xwiki.475771.n2.nabble.com/XWiki-Dev-f475773.html