To automatically activate user changes of user details, we configured a listener at author instance as explained on the following wiki page:
http://wiki.magnolia-cms.com/display/WIKI/Auto+activation+of+user+details

The auto-activation actually works, changes to details are immediately propagated to the public instance. But the issue we
are facing is, that an endless-loop creates log messages multiple times a second at author and public instance. This leads to
a system that is blocked by just logging.

CATALINA.OUT at Author instance
2010-06-28 12:57:50,541 INFO .magnolia.module.exchangesimple.BaseSyndicatorImpl: Exchange: activation succeeded [/admin/editors/supereditor]
2010-06-28 12:57:50,740 INFO .magnolia.module.exchangesimple.BaseSyndicatorImpl: Exchange: activation succeeded [/admin/editors/supereditor]
2010-06-28 12:57:50,967 INFO .magnolia.module.exchangesimple.BaseSyndicatorImpl: Exchange: activation succeeded [/admin/editors/supereditor]
2010-06-28 12:57:51,198 INFO .magnolia.module.exchangesimple.BaseSyndicatorImpl: Exchange: activation succeeded [/admin/editors/supereditor]
2010-06-28 12:57:51,391 INFO .magnolia.module.exchangesimple.BaseSyndicatorImpl: Exchange: activation succeeded [/admin/editors/supereditor]
2010-06-28 12:57:51,612 INFO .magnolia.module.exchangesimple.BaseSyndicatorImpl: Exchange: activation succeeded [/admin/editors/supereditor]
...

CATALINA.OUT at Public instance
2010-06-28 12:55:22,095 INFO nolia.module.exchangetransactional.XAReceiveFilter: User superuser successfuly activated /admin/editors/supereditor on ROOT.
2010-06-28 12:55:22,364 INFO nolia.module.exchangetransactional.XAReceiveFilter: User superuser successfuly activated /admin/editors/supereditor on ROOT.
2010-06-28 12:55:22,632 INFO nolia.module.exchangetransactional.XAReceiveFilter: User superuser successfuly activated /admin/editors/supereditor on ROOT.
2010-06-28 12:55:22,901 INFO nolia.module.exchangetransactional.XAReceiveFilter: User superuser successfuly activated /admin/editors/supereditor on ROOT.
2010-06-28 12:55:23,215 INFO nolia.module.exchangetransactional.XAReceiveFilter: User superuser successfuly activated /admin/editors/supereditor on ROOT.
2010-06-28 12:55:23,564 INFO nolia.module.exchangetransactional.XAReceiveFilter: User superuser successfuly activated /admin/editors/supereditor on ROOT.
2010-06-28 12:55:23,770 INFO nolia.module.exchangetransactional.XAReceiveFilter: User superuser successfuly activated /admin/editors/supereditor on ROOT.
...