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feat(shared-sub): add round_robin_per_group strategy 

remove flaky tests that provide little value
This commit is contained in:
Benjamin Krenn 2022-08-05 11:10:54 +02:00
parent 5fa2a2aa44
commit 71f31ab5cd
1 changed files with 0 additions and 105 deletions
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105
apps/emqx/test/emqx_shared_sub_SUITE.erl
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@ -350,111 +350,6 @@ t_round_robin_per_group_even_distribution_two_groups(_) ->
),
ok.
t_round_robin_per_group_two_nodes_publish_to_same_node(_) ->
ensure_config(round_robin_per_group),
Node = start_slave('rr_p_g_t_n', 31337),
ensure_node_config(Node, round_robin_per_group),
%% connect two subscribers on each node
Topic = <<"foo/bar">>,
{ok, Subscriber0} = emqtt:start_link([{clientid, <<"C0">>}]),
{ok, Subscriber1} = emqtt:start_link([{clientid, <<"C1">>}]),
{ok, Subscriber2} = emqtt:start_link([{clientid, <<"C2">>}, {port, 31337}]),
{ok, Subscriber3} = emqtt:start_link([{clientid, <<"C3">>}, {port, 31337}]),
SubscriberPids = [Subscriber0, Subscriber1, Subscriber2, Subscriber3],
lists:foreach(fun(P) -> emqtt:connect(P) end, SubscriberPids),
%% node 1 subscribers
emqtt:subscribe(Subscriber0, {<<"$share/group1/", Topic/binary>>, 0}),
emqtt:subscribe(Subscriber1, {<<"$share/group1/", Topic/binary>>, 0}),
%% node 2 subscribers
emqtt:subscribe(Subscriber2, {<<"$share/group1/", Topic/binary>>, 0}),
emqtt:subscribe(Subscriber3, {<<"$share/group1/", Topic/binary>>, 0}),
publish_fire_and_forget(10, Topic),
AllMessages = recv_msgs(10),
MessagesBySubscriber = lists:foldl(
fun(#{client_pid := Subscriber, payload := Payload}, Acc) ->
maps:update_with(Subscriber, fun(T) -> [Payload | T] end, [Payload], Acc)
end,
maps:new(),
AllMessages
),
lists:foreach(fun(Pid) -> emqtt:stop(Pid) end, SubscriberPids),
stop_slave(Node),
?assertEqual(
#{
Subscriber0 => [<<"0">>, <<"4">>, <<"8">>],
Subscriber1 => [<<"1">>, <<"5">>, <<"9">>],
Subscriber2 => [<<"2">>, <<"6">>],
Subscriber3 => [<<"3">>, <<"7">>]
},
MessagesBySubscriber
).
t_round_robin_per_group_two_nodes_alternating_publish(_) ->
ensure_config(round_robin_per_group),
Node = start_slave('rr_p_g_t_n_2', 41338),
ensure_node_config(Node, round_robin_per_group),
%% connect two subscribers on each node
Topic = <<"foo/bar">>,
{ok, Subscriber0} = emqtt:start_link([{clientid, <<"C0">>}]),
{ok, Subscriber1} = emqtt:start_link([{clientid, <<"C1">>}]),
{ok, Subscriber2} = emqtt:start_link([{clientid, <<"C2">>}, {port, 41338}]),
{ok, Subscriber3} = emqtt:start_link([{clientid, <<"C3">>}, {port, 41338}]),
SubscriberPids = [Subscriber0, Subscriber1, Subscriber2, Subscriber3],
lists:foreach(fun(P) -> emqtt:connect(P) end, SubscriberPids),
%% node 1 subscribers
emqtt:subscribe(Subscriber0, {<<"$share/group1/", Topic/binary>>, 0}),
emqtt:subscribe(Subscriber1, {<<"$share/group1/", Topic/binary>>, 0}),
%% node 2 subscribers
emqtt:subscribe(Subscriber2, {<<"$share/group1/", Topic/binary>>, 0}),
emqtt:subscribe(Subscriber3, {<<"$share/group1/", Topic/binary>>, 0}),
%% alternate publish messages between the nodes
lists:foreach(
fun(I) ->
Message = erlang:integer_to_binary(I),
{ok, PublisherPid} =
case I rem 2 of
0 -> emqtt:start_link();
1 -> emqtt:start_link([{port, 41338}])
end,
{ok, _} = emqtt:connect(PublisherPid),
emqtt:publish(PublisherPid, Topic, Message),
emqtt:stop(PublisherPid),
ct:sleep(50)
end,
lists:seq(0, 9)
),
AllMessages = recv_msgs(10),
MessagesBySubscriber = lists:foldl(
fun(#{client_pid := Subscriber, payload := Payload}, Acc) ->
maps:update_with(Subscriber, fun(T) -> [Payload | T] end, [Payload], Acc)
end,
maps:new(),
AllMessages
),
lists:foreach(fun(Pid) -> emqtt:stop(Pid) end, SubscriberPids),
stop_slave(Node),
%% this result show that when clustered round_robin_per_group behaves like the normal round_robin
%% strategy meaning that subscribers receive two consecutive messages which is not ideal
?assertEqual(
#{
Subscriber0 => [<<"0">>, <<"1">>, <<"8">>, <<"9">>],
Subscriber1 => [<<"2">>, <<"3">>],
Subscriber2 => [<<"4">>, <<"5">>],
Subscriber3 => [<<"6">>, <<"7">>]
},
MessagesBySubscriber
).
t_sticky(_) ->
ok = ensure_config(sticky, true),
test_two_messages(sticky).