If the channel send is sucessful and does not raise an exception, we set ret to True, in case a previous exception from a previous channel send to another master has sent it to False.

salt/crypt.py

@@ -523,10 +523,9 @@ class AsyncAuth(object):
                     # We have a list of masters, so we should break
                     # and try the next one in the list.
                     if self.opts.get('local_masters', None):
-                        log.debug('=== opts %s ===', self.opts['master'])
                         error = SaltClientError('Minion failed to authenticate'
-                                                'with the master, has the has'
-                                                'the minion key been accepted?')
+                                                ' with the master, has the '
+                                                'minion key been accepted?')
                         break
                     else:
                         print('Minion failed to authenticate with the master, '

salt/modules/event.py

@@ -84,6 +84,7 @@ def fire_master(data, tag, preload=None):
             channel = salt.transport.Channel.factory(__opts__, master_uri=master)
             try:
                 channel.send(load)
+                ret = True
             except Exception:
                 ret = False
         return ret