Nearly all of my gadgets are missing from the Add Gadgets UI after upgrading JIRA to 7.1.9. The existing dashboards display all of their gadgets properly, and the gadgets can be edited. I see errors like the following for every gadget, even standard JIRA gadgets:
2016-09-01 09:09:34,239 http-nio-8080-exec-25 WARN xxxuserxxx 549x2234x1 2wmggn 172.16.12.123,192.168.254.50 /secure/Dashboard.jspa [c.a.g.renderer.internal.GadgetSpecFactoryImpl] Error occurred while retrieving gadget spec for rest/gadgets/1.0/g/jira-timesheet-plugin:timechart-gadget/timechart-gadget.xml
This makes me think JIRA is hitting the URL incorrectly. I can manually add gadget URLs through the manage gadget UI in the admin settings, but this is painful and should not be necessary since these are not external gadgets.
