Requested licenses are not properly dispatched on all nodes

[surli]

Apparently licenses are not properly installed on all nodes in case of a XWiki install with multiples nodes like xwiki.org.

It just happened on xwiki.org when trying to install Poll App with a trial license: the license has been properly installed on one node only, making the app unusable on the other node. Requesting the license on both nodes solved the issue.

[tmortagne]

I would suggest that the license module start producing serializable events (so that they are automatically sent to the other cluster members) when a license is validated on one node. Then have a listener listening to this event and registering the license when the event is remote (using RemoteObservationManagerContext#isRemoteState()).

[mflorea]

ATM the workaround is to:

• get the license from one of the cluster nodes (this generates the license on the XWiki Store)
• use the Check for Updates button on the rest of the cluster nodes to download and apply the license that was generated in the previous step.