Looks like concurrence issue. Is there any other thread trying to modify same property.  

Generally Limit should be at oracle jdk hotspot.  [Integer.MAX_VALUE - 6]Are you getting oom & what is the exact error you are getting?

You can configure at http://<host>:<port>/system/console/configMgr/com.day.cq.commons.servlets.RootMappingServlet

AFAIK It is not supported from 5.5 onwards & has to be in single location.  That is the reason I am asking to file a daycare ticket because complexity comes to manage sycing two taxnomy in different structures.

Tags in CQ must be in the repository, under /etc/tags.  Can you file daycare with use case details & what made to maintain their taxonomy tree outside of /etc/tags

The Facebook Live Stream plugin has been deprecated by Facebook in October 2012. So the component no longer exists.

Provide the stacktrace.

You can use Sling User Manager OR better to use the UserManager API directly.  [0]  http://sling.apache.org/site/managing-users-and-groups-jackrabbitusermanager.html#Managingusersandgroups%2528jackrabbit.usermanager%2529-Getgroup [1] http://wemcode.wemblog.com/listmem 

You need custom implementation. No configurable option OOB.  Just curious why you need natural order instead of alphabetic?

1)   To hide the path for page request configure url mappings at http://<host>:<port>/system/console/configMgr/org.apache.sling.jcr.resource.internal.JcrResourceResolverFactoryImpl2)     To add vanity URL go to page properties otherwise you need to custom build based on your need.