question: protected void onObsolete ( ) { if ( LogConfiguration . loggingIsEnabled ( ) ) { logger . log ( Level . INFO , messages . applicationCacheObsolete ( ) ) ; } this . obsolete = true ; updating = false ; uiHandler . showMessage ( messages . applicationCacheObsolete ( ) ) ; fireApplicationCacheEvent ( CacheEvent . onObsolete ) ; }
target:  Called when an error event is triggered.