Default merged into bug 21457

10 files changed, 228 insertions, 159 deletions

diff --git a/src/rabbit.erl b/src/rabbit.erl
index d7a9497c66..6d24ff731b 100644
--- a/src/rabbit.erl
+++ b/src/rabbit.erl
@@ -222,6 +222,10 @@ log_location(Type) ->
         _                  -> undefined
     end.
 
+app_location() ->
+    {ok, Application} = application:get_application(),
+    filename:absname(code:where_is_file(atom_to_list(Application) ++ ".app")).
+
 %---------------------------------------------------------------------------
 
 print_banner() ->
@@ -244,10 +248,11 @@ print_banner() ->
               [Product, string:right([$v|Version], ProductLen),
                ?PROTOCOL_VERSION_MAJOR, ?PROTOCOL_VERSION_MINOR,
                ?COPYRIGHT_MESSAGE, ?INFORMATION_MESSAGE]),
-    Settings = [{"node",         node()},
-                {"log",          log_location(kernel)},
-                {"sasl log",     log_location(sasl)},
-                {"database dir", rabbit_mnesia:dir()}],
+    Settings = [{"node",           node()},
+                {"app descriptor", app_location()},
+                {"log",            log_location(kernel)},
+                {"sasl log",       log_location(sasl)},
+                {"database dir",   rabbit_mnesia:dir()}],
     DescrLen = lists:max([length(K) || {K, _V} <- Settings]),
     Format = "~-" ++ integer_to_list(DescrLen) ++ "s: ~s~n",
     lists:foreach(fun ({K, V}) -> io:format(Format, [K, V]) end, Settings),
diff --git a/src/rabbit_channel.erl b/src/rabbit_channel.erl
index 1285064f43..a1fa106665 100644
--- a/src/rabbit_channel.erl
+++ b/src/rabbit_channel.erl
@@ -125,11 +125,11 @@ handle_cast({method, Method, Content}, State) ->
         stop ->
             {stop, normal, State#ch{state = terminating}}
     catch
-        exit:{amqp, Error, Explanation, none} ->
+        exit:Reason = #amqp_error{} ->
             ok = rollback_and_notify(State),
-            Reason = {amqp, Error, Explanation,
-                      rabbit_misc:method_record_type(Method)},
-            State#ch.reader_pid ! {channel_exit, State#ch.channel, Reason},
+            MethodName = rabbit_misc:method_record_type(Method),
+            State#ch.reader_pid ! {channel_exit, State#ch.channel,
+                                   Reason#amqp_error{method = MethodName}},
             {stop, normal, State#ch{state = terminating}};
         exit:normal ->
             {stop, normal, State};
diff --git a/src/rabbit_control.erl b/src/rabbit_control.erl
index cf20520eb0..f701c4aafb 100644
--- a/src/rabbit_control.erl
+++ b/src/rabbit_control.erl
@@ -164,7 +164,7 @@ exchange name, routing key, queue name and arguments, in that order.
 <ConnectionInfoItem> must be a member of the list [node, address, port, 
 peer_address, peer_port, state, channels, user, vhost, timeout, frame_max,
 recv_oct, recv_cnt, send_oct, send_cnt, send_pend]. The default is to display 
-user, peer_address and peer_port.
+user, peer_address, peer_port and state.
 
 "),
     halt(1).
@@ -197,9 +197,11 @@ action(cluster, Node, ClusterNodeSs, Inform) ->
 
 action(status, Node, [], Inform) ->
     Inform("Status of node ~p", [Node]),
-    Res = call(Node, {rabbit, status, []}),
-    io:format("~p~n", [Res]),
-    ok;
+    case call(Node, {rabbit, status, []}) of
+        {badrpc, _} = Res -> Res;
+        Res               -> io:format("~p~n", [Res]),
+                             ok
+    end;
 
 action(rotate_logs, Node, [], Inform) ->
     Inform("Reopening logs for node ~p", [Node]),
@@ -270,8 +272,9 @@ action(list_bindings, Node, Args, Inform) ->
 
 action(list_connections, Node, Args, Inform) ->
     Inform("Listing connections", []),
-    ArgAtoms = list_replace(node, pid, 
-                            default_if_empty(Args, [user, peer_address, peer_port])),
+    ArgAtoms = list_replace(node, pid,
+                            default_if_empty(Args, [user, peer_address,
+                                                    peer_port, state])),
     display_info_list(rpc_call(Node, rabbit_networking, connection_info_all,
                                [ArgAtoms]),
                       ArgAtoms);
@@ -314,7 +317,7 @@ default_if_empty(List, Default) when is_list(List) ->
     end.
 
 display_info_list(Results, InfoItemKeys) when is_list(Results) ->
-    lists:foreach(fun (Result) -> display_row([format_info_item(Result, X) ||
+    lists:foreach(fun (Result) -> display_row([format_info_item(X, Result) ||
                                                   X <- InfoItemKeys])
                   end, Results),
     ok;
@@ -325,18 +328,20 @@ display_row(Row) ->
     io:fwrite(lists:flatten(rabbit_misc:intersperse("\t", Row))),
     io:nl().
 
-format_info_item(Items, Key) ->
-    {value, Info = {Key, Value}} = lists:keysearch(Key, 1, Items),
-    case Info of
-        {_, #resource{name = Name}} ->
+format_info_item(Key, Items) ->
+    case proplists:get_value(Key, Items) of
+        #resource{name = Name} ->
             escape(Name);
-        _ when Key =:= address; Key =:= peer_address andalso is_tuple(Value) ->
+        Value when Key =:= address; Key =:= peer_address andalso
+                   is_tuple(Value) ->
             inet_parse:ntoa(Value);
-        _ when is_pid(Value) ->
+        Value when is_pid(Value) ->
             atom_to_list(node(Value));
-        _ when is_binary(Value) -> 
+        Value when is_binary(Value) -> 
             escape(Value);
-        _ -> 
+        Value when is_atom(Value) ->
+             escape(atom_to_list(Value));
+        Value -> 
             io_lib:format("~w", [Value])
     end.
 
@@ -362,7 +367,9 @@ rpc_call(Node, Mod, Fun, Args) ->
 %% form part of UTF-8 strings.
 
 escape(Bin) when binary(Bin) ->
-    escape_char(lists:reverse(binary_to_list(Bin)), []).
+    escape(binary_to_list(Bin));
+escape(L) when is_list(L) ->
+    escape_char(lists:reverse(L), []).
 
 escape_char([$\\ | T], Acc) ->
     escape_char(T, [$\\, $\\ | Acc]);
diff --git a/src/rabbit_dialyzer.erl b/src/rabbit_dialyzer.erl
new file mode 100644
index 0000000000..23e6fc4432
--- /dev/null
+++ b/src/rabbit_dialyzer.erl
@@ -0,0 +1,91 @@
+%%   The contents of this file are subject to the Mozilla Public License
+%%   Version 1.1 (the "License"); you may not use this file except in
+%%   compliance with the License. You may obtain a copy of the License at
+%%   http://www.mozilla.org/MPL/
+%%
+%%   Software distributed under the License is distributed on an "AS IS"
+%%   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+%%   License for the specific language governing rights and limitations
+%%   under the License.
+%%
+%%   The Original Code is RabbitMQ.
+%%
+%%   The Initial Developers of the Original Code are LShift Ltd,
+%%   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
+%%
+%%   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
+%%   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
+%%   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
+%%   Technologies LLC, and Rabbit Technologies Ltd.
+%%
+%%   Portions created by LShift Ltd are Copyright (C) 2007-2009 LShift
+%%   Ltd. Portions created by Cohesive Financial Technologies LLC are
+%%   Copyright (C) 2007-2009 Cohesive Financial Technologies
+%%   LLC. Portions created by Rabbit Technologies Ltd are Copyright
+%%   (C) 2007-2009 Rabbit Technologies Ltd.
+%%
+%%   All Rights Reserved.
+%%
+%%   Contributor(s): ______________________________________.
+%%
+
+-module(rabbit_dialyzer).
+-include("rabbit.hrl").
+
+-export([create_basic_plt/1, add_to_plt/2, dialyze_files/2, halt_with_code/1]).
+
+%%----------------------------------------------------------------------------
+
+-ifdef(use_specs).
+
+-spec(create_basic_plt/1 :: (string()) -> 'ok').
+-spec(add_to_plt/2 :: (string(), string()) -> 'ok').
+-spec(dialyze_files/2 :: (string(), string()) -> 'ok').
+-spec(halt_with_code/1 :: (atom()) -> no_return()).
+
+-endif.
+
+%%----------------------------------------------------------------------------
+
+create_basic_plt(BasicPltPath) ->
+    OptsRecord = dialyzer_options:build(
+                   [{analysis_type, plt_build},
+                    {output_plt, BasicPltPath},
+                    {files_rec, otp_apps_dependencies_paths()}]),
+    dialyzer_cl:start(OptsRecord),
+    ok.
+
+add_to_plt(PltPath, FilesString) ->
+    {ok, Files} = regexp:split(FilesString, " "),
+    DialyzerWarnings = dialyzer:run([{analysis_type, plt_add},
+                                     {init_plt, PltPath},
+                                     {output_plt, PltPath},
+                                     {files, Files}]),
+    print_warnings(DialyzerWarnings),
+    ok.
+
+dialyze_files(PltPath, ModifiedFiles) ->
+    {ok, Files} = regexp:split(ModifiedFiles, " "),
+    DialyzerWarnings = dialyzer:run([{init_plt, PltPath},
+                                     {files, Files}]),
+    case DialyzerWarnings of
+        [] -> io:format("~nOk~n"),
+              ok;
+        _  -> io:format("~nFAILED with the following warnings:~n"),
+              print_warnings(DialyzerWarnings),
+              fail
+    end.
+
+print_warnings(Warnings) ->
+    [io:format("~s", [dialyzer:format_warning(W)]) || W <- Warnings],
+    io:format("~n"),
+    ok.
+
+otp_apps_dependencies_paths() ->
+    [code:lib_dir(App, ebin) ||
+        App <- [kernel, stdlib, sasl, mnesia, os_mon, ssl, eunit, tools]].
+
+halt_with_code(ok) ->
+    halt();
+halt_with_code(fail) ->
+    halt(1).
diff --git a/src/rabbit_load.erl b/src/rabbit_load.erl
index 7bf85347fb..6ef638cb59 100644
--- a/src/rabbit_load.erl
+++ b/src/rabbit_load.erl
@@ -41,7 +41,7 @@
 -ifdef(use_specs).
 
 -type(erlang_node() :: atom()).
--type(load() :: {{non_neg_integer(), float()}, erlang_node()}).
+-type(load() :: {{non_neg_integer(), integer() | 'unknown'}, erlang_node()}).
 -spec(local_load/0 :: () -> load()).
 -spec(remote_loads/0 :: () -> [load()]).
 -spec(pick/0 :: () -> erlang_node()).
@@ -52,8 +52,11 @@
 
 local_load() ->
     LoadAvg = case whereis(cpu_sup) of
-                  undefined -> 0.0;
-                  _Other -> cpu_sup:avg1()
+                  undefined -> unknown;
+                  _         -> case cpu_sup:avg1() of
+                                   L when is_integer(L) -> L;
+                                   {error, timeout}     -> unknown
+                               end
               end,
     {{statistics(run_queue), LoadAvg}, node()}.
 
@@ -65,8 +68,12 @@ remote_loads() ->
 pick() ->
     RemoteLoads = remote_loads(),
     {{RunQ, LoadAvg}, Node} = local_load(),
-    %% add bias towards current node
-    AdjustedLoadAvg = LoadAvg * ?FUDGE_FACTOR,
+    %% add bias towards current node; we rely on Erlang's term order
+    %% of SomeFloat < local_unknown < unknown.
+    AdjustedLoadAvg = case LoadAvg of
+                          unknown -> local_unknown;
+                          _       -> LoadAvg * ?FUDGE_FACTOR
+                      end,
     Loads = [{{RunQ, AdjustedLoadAvg}, Node} | RemoteLoads],
     {_, SelectedNode} = lists:min(Loads),
     SelectedNode.
diff --git a/src/rabbit_misc.erl b/src/rabbit_misc.erl
index 95a274e37e..5843143839 100644
--- a/src/rabbit_misc.erl
+++ b/src/rabbit_misc.erl
@@ -35,7 +35,8 @@
 -include_lib("kernel/include/file.hrl").
 
 -export([method_record_type/1, polite_pause/0, polite_pause/1]).
--export([die/1, frame_error/2, protocol_error/3, protocol_error/4]).
+-export([die/1, frame_error/2, amqp_error/4,
+         protocol_error/3, protocol_error/4]).
 -export([not_found/1]).
 -export([get_config/1, get_config/2, set_config/2]).
 -export([dirty_read/1]).
@@ -74,10 +75,9 @@
 -spec(polite_pause/1 :: (non_neg_integer()) -> 'done').
 -spec(die/1 :: (atom()) -> no_return()).
 -spec(frame_error/2 :: (atom(), binary()) -> no_return()).
--spec(protocol_error/3 ::
-      (atom() | amqp_error(), string(), [any()]) -> no_return()).
--spec(protocol_error/4 ::
-      (atom() | amqp_error(), string(), [any()], atom()) -> no_return()).
+-spec(amqp_error/4 :: (atom(), string(), [any()], atom()) -> amqp_error()).
+-spec(protocol_error/3 :: (atom(), string(), [any()]) -> no_return()).
+-spec(protocol_error/4 :: (atom(), string(), [any()], atom()) -> no_return()).
 -spec(not_found/1 :: (r(atom())) -> no_return()).
 -spec(get_config/1 :: (atom()) -> {'ok', any()} | not_found()).
 -spec(get_config/2 :: (atom(), A) -> A).
@@ -144,15 +144,17 @@ die(Error) ->
     protocol_error(Error, "~w", [Error]).
 
 frame_error(MethodName, BinaryFields) ->
-    protocol_error(frame_error, "cannot decode ~w",
-                   [BinaryFields], MethodName).
+    protocol_error(frame_error, "cannot decode ~w", [BinaryFields], MethodName).
 
-protocol_error(Error, Explanation, Params) ->
-    protocol_error(Error, Explanation, Params, none).
+amqp_error(Name, ExplanationFormat, Params, Method) ->
+    Explanation = lists:flatten(io_lib:format(ExplanationFormat, Params)),
+    #amqp_error{name = Name, explanation = Explanation, method = Method}.
 
-protocol_error(Error, Explanation, Params, Method) ->
-    CompleteExplanation = lists:flatten(io_lib:format(Explanation, Params)),
-    exit({amqp, Error, CompleteExplanation, Method}).
+protocol_error(Name, ExplanationFormat, Params) ->
+    protocol_error(Name, ExplanationFormat, Params, none).
+
+protocol_error(Name, ExplanationFormat, Params, Method) ->
+    exit(amqp_error(Name, ExplanationFormat, Params, Method)).
 
 not_found(R) -> protocol_error(not_found, "no ~s", [rs(R)]).
 
diff --git a/src/rabbit_multi.erl b/src/rabbit_multi.erl
index d91975359a..b1cc4d028f 100644
--- a/src/rabbit_multi.erl
+++ b/src/rabbit_multi.erl
@@ -114,12 +114,13 @@ action(status, [], RpcTimeout) ->
     io:format("Status of all running nodes...~n", []),
     call_all_nodes(
       fun({Node, Pid}) ->
-              Status = rpc:call(Node, rabbit, status, [], RpcTimeout),
+              RabbitRunning =
+                  case is_rabbit_running(Node, RpcTimeout) of
+                      false -> not_running;
+                      true  -> running
+                  end,
               io:format("Node '~p' with Pid ~p: ~p~n",
-                        [Node, Pid, case parse_status(Status) of
-                                        false -> not_running;
-                                        true  -> running
-                                    end])
+                        [Node, Pid, RabbitRunning])
       end);
 
 action(stop_all, [], RpcTimeout) ->
@@ -197,7 +198,7 @@ start_node(NodeName, NodePort, RpcTimeout) ->
 wait_for_rabbit_to_start(_ , RpcTimeout, _) when RpcTimeout < 0 ->
     false;
 wait_for_rabbit_to_start(Node, RpcTimeout, Port) ->
-    case parse_status(rpc:call(Node, rabbit, status, [])) of
+    case is_rabbit_running(Node, RpcTimeout) of
         true  -> true;
         false -> receive
                      {'EXIT', Port, PosixCode} ->
@@ -211,22 +212,20 @@ wait_for_rabbit_to_start(Node, RpcTimeout, Port) ->
 run_cmd(FullPath) ->
     erlang:open_port({spawn, FullPath}, [nouse_stdio]).
 
-parse_status({badrpc, _}) ->
-    false;
-
-parse_status(Status) ->
-    case lists:keysearch(running_applications, 1, Status) of
-        {value, {running_applications, Apps}} ->
-            lists:keymember(rabbit, 1, Apps);
-        _ ->
-            false
+is_rabbit_running(Node, RpcTimeout) ->
+    case rpc:call(Node, rabbit, status, [], RpcTimeout) of
+        {badrpc, _} -> false;
+        Status      -> case proplists:get_value(running_applications, Status) of
+                           undefined -> false;
+                           Apps      -> lists:keymember(rabbit, 1, Apps)
+                       end
     end.
 
 with_os(Handlers) ->
     {OsFamily, _} = os:type(),
-    case lists:keysearch(OsFamily, 1, Handlers) of
-        {value, {_, Handler}} -> Handler();
-        false -> throw({unsupported_os, OsFamily})
+    case proplists:get_value(OsFamily, Handlers) of
+        undefined -> throw({unsupported_os, OsFamily});
+        Handler   -> Handler()
     end.
 
 script_filename() ->
diff --git a/src/rabbit_networking.erl b/src/rabbit_networking.erl
index eed21a01cd..1dd935187a 100644
--- a/src/rabbit_networking.erl
+++ b/src/rabbit_networking.erl
@@ -101,7 +101,7 @@ check_tcp_listener_address(NamePrefix, Host, Port) ->
     if is_integer(Port) andalso (Port >= 0) andalso (Port =< 65535) -> ok;
        true -> error_logger:error_msg("invalid port ~p - not 0..65535~n",
                                       [Port]),
-               throw({error, invalid_port, Port})
+               throw({error, {invalid_port, Port}})
     end,
     Name = rabbit_misc:tcp_name(NamePrefix, IPAddress, Port),
     {IPAddress, Name}.
diff --git a/src/rabbit_plugin_activator.erl b/src/rabbit_plugin_activator.erl
index 71278bfb2a..0206f73e9f 100644
--- a/src/rabbit_plugin_activator.erl
+++ b/src/rabbit_plugin_activator.erl
@@ -68,7 +68,7 @@ start() ->
                       AppList
               end,
     AppVersions = [determine_version(App) || App <- AllApps],
-    {value, {rabbit, RabbitVersion}} = lists:keysearch(rabbit, 1, AppVersions),
+    {rabbit, RabbitVersion} = proplists:lookup(rabbit, AppVersions),
 
     %% Build the overall release descriptor
     RDesc = {release, 
diff --git a/src/rabbit_reader.erl b/src/rabbit_reader.erl
index 69dbc008b3..5cc989929f 100644
--- a/src/rabbit_reader.erl
+++ b/src/rabbit_reader.erl
@@ -49,7 +49,6 @@
 -define(HANDSHAKE_TIMEOUT, 10).
 -define(NORMAL_TIMEOUT, 3).
 -define(CLOSING_TIMEOUT, 1).
--define(CHANNEL_CLOSING_TIMEOUT, 1).
 -define(CHANNEL_TERMINATION_TIMEOUT, 3).
 
 %---------------------------------------------------------------------------
@@ -94,23 +93,19 @@
 %%   -> log error, wait for channels to terminate forcefully, start
 %%      terminate_connection timer, send close, *closed*
 %%   channel exit with soft error
-%%   -> log error, start terminate_channel timer, mark channel as
-%%      closing, *running*
-%%   terminate_channel timeout -> remove 'closing' mark, *running*
+%%   -> log error, mark channel as closing, *running*
 %%   handshake_timeout -> ignore, *running*
 %%   heartbeat timeout -> *throw*
 %% closing:
 %%   socket close -> *terminate*
 %%   receive frame -> ignore, *closing*
-%%   terminate_channel timeout -> remove 'closing' mark, *closing*
 %%   handshake_timeout -> ignore, *closing*
 %%   heartbeat timeout -> *throw*
 %%   channel exit with hard error
 %%   -> log error, wait for channels to terminate forcefully, start
 %%      terminate_connection timer, send close, *closed*
 %%   channel exit with soft error
-%%   -> log error, start terminate_channel timer, mark channel as
-%%      closing
+%%   -> log error, mark channel as closing
 %%      if last channel to exit then send connection.close_ok,
 %%         start terminate_connection timer, *closed*
 %%      else *closing*
@@ -123,7 +118,6 @@
 %%     *closed*
 %%   receive frame -> ignore, *closed*
 %%   terminate_connection timeout -> *terminate*
-%%   terminate_channel timeout -> remove 'closing' mark, *closed*
 %%   handshake_timeout -> ignore, *closed*
 %%   heartbeat timeout -> *throw*
 %%   channel exit -> log error, *closed*
@@ -269,12 +263,10 @@ mainloop(Parent, Deb, State = #v1{sock= Sock, recv_ref = Ref}) ->
             throw({inet_error, Reason});
         {'EXIT', Parent, Reason} ->
             if State#v1.connection_state =:= running ->
-                    send_exception(
-                      State, 0,
-                      {amqp, connection_forced,
-                       io_lib:format(
-                         "broker forced connection closure with reason '~w'",
-                         [Reason]), none});
+                    send_exception(State, 0,
+                        rabbit_misc:amqp_error(connection_forced,
+                            "broker forced connection closure with reason '~w'",
+                            [Reason], none));
                true -> ok
             end,
             %% this is what we are expected to do according to 
@@ -292,8 +284,6 @@ mainloop(Parent, Deb, State = #v1{sock= Sock, recv_ref = Ref}) ->
             mainloop(Parent, Deb, handle_channel_exit(Channel, Reason, State));
         {'EXIT', Pid, Reason} ->
             mainloop(Parent, Deb, handle_dependent_exit(Pid, Reason, State));
-        {terminate_channel, Channel, Ref1} ->
-            mainloop(Parent, Deb, terminate_channel(Channel, Ref1, State));
         terminate_connection ->
             State;
         handshake_timeout ->
@@ -341,32 +331,14 @@ close_connection(State = #v1{connection = #connection{
     State#v1{connection_state = closed}.
 
 close_channel(Channel, State) ->
-    Ref = make_ref(),
-    TRef = erlang:send_after(1000 * ?CHANNEL_CLOSING_TIMEOUT,
-                             self(),
-                             {terminate_channel, Channel, Ref}),
-    put({closing_channel, Channel}, {Ref, TRef}),
-    State.
-
-terminate_channel(Channel, Ref, State) ->
-    case get({closing_channel, Channel}) of
-        undefined -> ok; %% got close_ok in the meantime
-        {Ref, _}  -> erase({closing_channel, Channel}),
-                     ok;
-        {_Ref, _} -> ok %% got close_ok, and have new closing channel
-    end,
+    put({channel, Channel}, closing),
     State.
 
 handle_channel_exit(Channel, Reason, State) ->
-    %% We remove the channel from the inbound map only. That allows
-    %% the channel to be re-opened, but also means the remaining
-    %% cleanup, including possibly closing the connection, is deferred
-    %% until we get the (normal) exit signal.
-    erase({channel, Channel}),
     handle_exception(State, Channel, Reason).
 
 handle_dependent_exit(Pid, normal, State) ->
-    channel_cleanup(Pid),
+    erase({chpid, Pid}),
     maybe_close(State);
 handle_dependent_exit(Pid, Reason, State) ->
     case channel_cleanup(Pid) of
@@ -376,17 +348,10 @@ handle_dependent_exit(Pid, Reason, State) ->
 
 channel_cleanup(Pid) ->
     case get({chpid, Pid}) of
-        undefined ->
-            case get({closing_chpid, Pid}) of
-                undefined -> undefined;
-                {channel, Channel} ->
-                    erase({closing_chpid, Pid}),
-                    Channel
-            end;
-        {channel, Channel} ->
-            erase({channel, Channel}),
-            erase({chpid, Pid}),
-            Channel
+        undefined          -> undefined;
+        {channel, Channel} -> erase({channel, Channel}),
+                              erase({chpid, Pid}),
+                              Channel
     end.
 
 all_channels() -> [Pid || {{chpid, Pid},_} <- get()].
@@ -451,7 +416,7 @@ handle_frame(_Type, _Channel, _Payload, State = #v1{connection_state = CS})
     State;
 handle_frame(Type, 0, Payload, State) ->
     case analyze_frame(Type, Payload) of
-        error     -> throw({unknown_frame, Type, Payload});
+        error     -> throw({unknown_frame, 0, Type, Payload});
         heartbeat -> State;
         trace     -> State;
         {method, MethodName, FieldsBin} ->
@@ -460,20 +425,34 @@ handle_frame(Type, 0, Payload, State) ->
     end;
 handle_frame(Type, Channel, Payload, State) ->
     case analyze_frame(Type, Payload) of
-        error         -> throw({unknown_frame, Type, Payload});
+        error         -> throw({unknown_frame, Channel, Type, Payload});
         heartbeat     -> throw({unexpected_heartbeat_frame, Channel});
         trace         -> throw({unexpected_trace_frame, Channel});
         AnalyzedFrame ->
             %%?LOGDEBUG("Ch ~p Frame ~p~n", [Channel, AnalyzedFrame]),
             case get({channel, Channel}) of
                 {chpid, ChPid} ->
-                    ok = check_for_close(Channel, ChPid, AnalyzedFrame),
+                    case AnalyzedFrame of
+                        {method, 'channel.close', _} ->
+                            erase({channel, Channel});
+                        _ -> ok
+                    end,
                     ok = rabbit_framing_channel:process(ChPid, AnalyzedFrame),
                     State;
+                closing ->
+                    %% According to the spec, after sending a
+                    %% channel.close we must ignore all frames except
+                    %% channel.close_ok.
+                    case AnalyzedFrame of
+                        {method, 'channel.close_ok', _} ->
+                            erase({channel, Channel});
+                        _ -> ok
+                    end,
+                    State;
                 undefined ->
                     case State#v1.connection_state of
-                        running -> send_to_new_channel(
-                                     Channel, AnalyzedFrame, State),
+                        running -> ok = send_to_new_channel(
+                                          Channel, AnalyzedFrame, State),
                                    State;
                         Other   -> throw({channel_frame_while_starting,
                                           Channel, Other, AnalyzedFrame})
@@ -567,17 +546,17 @@ handle_method0(MethodName, FieldsBin, State) ->
                          MethodName, FieldsBin),
                        State)
     catch exit:Reason ->
-            CompleteReason =
-                case Reason of
-                    {amqp, Error, Explanation, none} ->
-                        {amqp, Error, Explanation, MethodName};
-                    OtherReason -> OtherReason
-                end,
+            CompleteReason = case Reason of
+                                 #amqp_error{method = none} ->
+                                     Reason#amqp_error{method = MethodName};
+                                 OtherReason -> OtherReason
+                             end,
             case State#v1.connection_state of
                 running -> send_exception(State, 0, CompleteReason);
                 Other   -> throw({channel0_error, Other, CompleteReason})
             end
     end.
+
 handle_method0(#'connection.start_ok'{mechanism = Mechanism,
                                       response = Response},
                State = #v1{connection_state = starting,
@@ -703,7 +682,7 @@ i(channels, #v1{}) ->
 i(user, #v1{connection = #connection{user = #user{username = Username}}}) ->
     Username;
 i(user, #v1{connection = #connection{user = none}}) ->
-    none;
+    '';
 i(vhost, #v1{connection = #connection{vhost = VHost}}) ->
     VHost;
 i(timeout, #v1{connection = #connection{timeout_sec = Timeout}}) ->
@@ -716,38 +695,17 @@ i(Item, #v1{}) ->
 %%--------------------------------------------------------------------------
 
 send_to_new_channel(Channel, AnalyzedFrame, State) ->
-    case get({closing_channel, Channel}) of
-        undefined ->
-            #v1{sock = Sock,
-                connection = #connection{
-                  frame_max = FrameMax,
-                  user = #user{username = Username},
-                  vhost = VHost}} = State,
-            WriterPid = rabbit_writer:start(Sock, Channel, FrameMax),
-            ChPid = rabbit_framing_channel:start_link(
-                      fun rabbit_channel:start_link/5,
-                      [Channel, self(), WriterPid, Username, VHost]),
-            put({channel, Channel}, {chpid, ChPid}),
-            put({chpid, ChPid}, {channel, Channel}),
-            ok = rabbit_framing_channel:process(ChPid, AnalyzedFrame);
-        {_, TRef} ->
-            %% According to the spec, after sending a channel.close we
-            %% must ignore all frames except channel.close_ok.
-            case AnalyzedFrame of
-                {method, 'channel.close_ok', _} ->
-                    erlang:cancel_timer(TRef),
-                    erase({closing_channel, Channel}),
-                    ok;
-                _Other -> ok
-            end
-    end.
-
-check_for_close(Channel, ChPid, {method, 'channel.close', _}) ->
-    channel_cleanup(ChPid),
-    put({closing_chpid, ChPid}, {channel, Channel}),
-    ok;
-check_for_close(_Channel, _ChPid, _Frame) ->
-    ok.
+    #v1{sock = Sock, connection = #connection{
+                       frame_max = FrameMax,
+                       user = #user{username = Username},
+                       vhost = VHost}} = State,
+    WriterPid = rabbit_writer:start(Sock, Channel, FrameMax),
+    ChPid = rabbit_framing_channel:start_link(
+              fun rabbit_channel:start_link/5,
+              [Channel, self(), WriterPid, Username, VHost]),
+    put({channel, Channel}, {chpid, ChPid}),
+    put({chpid, ChPid}, {channel, Channel}),
+    ok = rabbit_framing_channel:process(ChPid, AnalyzedFrame).
 
 log_channel_error(ConnectionState, Channel, Reason) ->
     rabbit_log:error("connection ~p (~p), channel ~p - error:~n~p~n",
@@ -793,18 +751,18 @@ map_exception(Channel, Reason) ->
         end,
     {ShouldClose, CloseChannel, CloseMethod}.
 
-lookup_amqp_exception({amqp, {ShouldClose, Code, Text}, Expl, Method}) ->
+lookup_amqp_exception(
+  #amqp_error{name = Name, explanation = Expl, method = Method}) ->
+    {ShouldClose, Code, Text} = rabbit_framing:lookup_amqp_exception(Name),
     ExplBin = list_to_binary(Expl),
     CompleteTextBin = <<Text/binary, " - ", ExplBin/binary>>,
     SafeTextBin = if size(CompleteTextBin) > 255 ->
                           <<CompleteTextBin:252/binary, "...">>;
-                     true ->
-                          CompleteTextBin
+                     true -> CompleteTextBin
                   end,
     {ShouldClose, Code, SafeTextBin, Method};
-lookup_amqp_exception({amqp, ErrorName, Expl, Method}) ->
-    Details = rabbit_framing:lookup_amqp_exception(ErrorName), 
-    lookup_amqp_exception({amqp, Details, Expl, Method});
 lookup_amqp_exception(Other) ->
     rabbit_log:warning("Non-AMQP exit reason '~p'~n", [Other]),
-    {true, ?INTERNAL_ERROR, <<"INTERNAL_ERROR">>, none}.
+    {ShouldClose, Code, Text} =
+        rabbit_framing:lookup_amqp_exception(internal_error),
+    {ShouldClose, Code, Text, none}.