Merge pull request #3643 from rabbitmq/rebalance-logging

Turn down logging from queue rebalancing

(cherry picked from commit 8827d51)

Conflicts:
	deps/rabbit/src/rabbit_amqqueue.erl

Author: michaelklishin

deps/rabbit/src/rabbit_amqqueue.erl

@@ -602,11 +602,11 @@ maybe_migrate(ByNode, MaxQueuesDesired, [N | Nodes]) ->
                     {not_migrated, update_not_migrated_queue(N, Queue, Queues, ByNode)};
                 _ ->
                     [{Length, Destination} | _] = sort_by_number_of_queues(Candidates, ByNode),
-                    _ = rabbit_log:warning("Migrating queue ~p from node ~p with ~p queues to node ~p with ~p queues",
+                    _ = rabbit_log:info("Migrating queue ~p from node ~p with ~p queues to node ~p with ~p queues",
                                        [Name, N, length(All), Destination, Length]),
                     case Module:transfer_leadership(Q, Destination) of
                         {migrated, NewNode} ->
-                            _ = rabbit_log:warning("Queue ~p migrated to ~p", [Name, NewNode]),
+                            _ = rabbit_log:info("Queue ~p migrated to ~p", [Name, NewNode]),
                             {migrated, update_migrated_queue(Destination, N, Queue, Queues, ByNode)};
                         {not_migrated, Reason} ->
                             _ = rabbit_log:warning("Error migrating queue ~p: ~p", [Name, Reason]),
@@ -618,7 +618,7 @@ maybe_migrate(ByNode, MaxQueuesDesired, [N | Nodes]) ->
                                "Do nothing", [N, length(All)]),
             maybe_migrate(ByNode, MaxQueuesDesired, Nodes);
         All ->
-            _ = rabbit_log:warning("Node ~p only contains ~p queues, do nothing",
+            _ = rabbit_log:debug("Node ~p only contains ~p queues, do nothing",
                                [N, length(All)]),
             maybe_migrate(ByNode, MaxQueuesDesired, Nodes)
     end.