Merge branch 'feat/log-possible-hol' into 'develop'

ConnectionPool: Log possible HTTP1 blocks

See merge request pleroma/pleroma!2989
This commit is contained in:
rinpatch 2020-09-11 12:50:05 +00:00
commit 9fb88c814d
3 changed files with 38 additions and 14 deletions

View file

@ -50,10 +50,10 @@ defmodule Pleroma.Gun.Conn do
with open_opts <- Map.delete(opts, :tls_opts),
{:ok, conn} <- Gun.open(proxy_host, proxy_port, open_opts),
{:ok, _} <- Gun.await_up(conn, opts[:connect_timeout]),
{:ok, protocol} <- Gun.await_up(conn, opts[:connect_timeout]),
stream <- Gun.connect(conn, connect_opts),
{:response, :fin, 200, _} <- Gun.await(conn, stream) do
{:ok, conn}
{:ok, conn, protocol}
else
error ->
Logger.warn(
@ -88,8 +88,8 @@ defmodule Pleroma.Gun.Conn do
|> Map.put(:socks_opts, socks_opts)
with {:ok, conn} <- Gun.open(proxy_host, proxy_port, opts),
{:ok, _} <- Gun.await_up(conn, opts[:connect_timeout]) do
{:ok, conn}
{:ok, protocol} <- Gun.await_up(conn, opts[:connect_timeout]) do
{:ok, conn, protocol}
else
error ->
Logger.warn(
@ -106,8 +106,8 @@ defmodule Pleroma.Gun.Conn do
host = Pleroma.HTTP.AdapterHelper.parse_host(host)
with {:ok, conn} <- Gun.open(host, port, opts),
{:ok, _} <- Gun.await_up(conn, opts[:connect_timeout]) do
{:ok, conn}
{:ok, protocol} <- Gun.await_up(conn, opts[:connect_timeout]) do
{:ok, conn, protocol}
else
error ->
Logger.warn(

View file

@ -15,7 +15,7 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
@impl true
def handle_continue({:connect, [key, uri, opts, client_pid]}, _) do
with {:ok, conn_pid} <- Gun.Conn.open(uri, opts),
with {:ok, conn_pid, protocol} <- Gun.Conn.open(uri, opts),
Process.link(conn_pid) do
time = :erlang.monotonic_time(:millisecond)
@ -27,8 +27,12 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
send(client_pid, {:conn_pid, conn_pid})
{:noreply,
%{key: key, timer: nil, client_monitors: %{client_pid => Process.monitor(client_pid)}},
:hibernate}
%{
key: key,
timer: nil,
client_monitors: %{client_pid => Process.monitor(client_pid)},
protocol: protocol
}, :hibernate}
else
err ->
{:stop, {:shutdown, err}, nil}
@ -53,14 +57,20 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
end
@impl true
def handle_call(:add_client, {client_pid, _}, %{key: key} = state) do
def handle_call(:add_client, {client_pid, _}, %{key: key, protocol: protocol} = state) do
time = :erlang.monotonic_time(:millisecond)
{{conn_pid, _, _, _}, _} =
{{conn_pid, used_by, _, _}, _} =
Registry.update_value(@registry, key, fn {conn_pid, used_by, crf, last_reference} ->
{conn_pid, [client_pid | used_by], crf(time - last_reference, crf), time}
end)
:telemetry.execute(
[:pleroma, :connection_pool, :client, :add],
%{client_pid: client_pid, clients: used_by},
%{key: state.key, protocol: protocol}
)
state =
if state.timer != nil do
Process.cancel_timer(state[:timer])
@ -131,7 +141,7 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
@impl true
def handle_info({:DOWN, _ref, :process, pid, reason}, state) do
:telemetry.execute(
[:pleroma, :connection_pool, :client_death],
[:pleroma, :connection_pool, :client, :dead],
%{client_pid: pid, reason: reason},
%{key: state.key}
)

View file

@ -7,7 +7,8 @@ defmodule Pleroma.Telemetry.Logger do
[:pleroma, :connection_pool, :reclaim, :start],
[:pleroma, :connection_pool, :reclaim, :stop],
[:pleroma, :connection_pool, :provision_failure],
[:pleroma, :connection_pool, :client_death]
[:pleroma, :connection_pool, :client, :dead],
[:pleroma, :connection_pool, :client, :add]
]
def attach do
:telemetry.attach_many("pleroma-logger", @events, &handle_event/4, [])
@ -62,7 +63,7 @@ defmodule Pleroma.Telemetry.Logger do
end
def handle_event(
[:pleroma, :connection_pool, :client_death],
[:pleroma, :connection_pool, :client, :dead],
%{client_pid: client_pid, reason: reason},
%{key: key},
_
@ -73,4 +74,17 @@ defmodule Pleroma.Telemetry.Logger do
}"
end)
end
def handle_event(
[:pleroma, :connection_pool, :client, :add],
%{clients: [_, _ | _] = clients},
%{key: key, protocol: :http},
_
) do
Logger.info(fn ->
"Pool worker for #{key}: #{length(clients)} clients are using an HTTP1 connection at the same time, head-of-line blocking might occur."
end)
end
def handle_event([:pleroma, :connection_pool, :client, :add], _, _, _), do: :ok
end