forked from AkkomaGang/akkoma
Fix race in enforcer/reclaimer start
This commit is contained in:
href
rinpatch
parent
6a0f2bdf8c
commit
23d714ed30
2 changed files with 89 additions and 77 deletions
85
lib/pleroma/gun/connection_pool/reclaimer.ex
Normal file
85
lib/pleroma/gun/connection_pool/reclaimer.ex
Normal file
|
|
@ -0,0 +1,85 @@
|
|||
defmodule Pleroma.Gun.ConnectionPool.Reclaimer do
|
||||
use GenServer, restart: :temporary
|
||||
|
||||
@registry Pleroma.Gun.ConnectionPool
|
||||
|
||||
def start_monitor() do
|
||||
pid =
|
||||
case :gen_server.start(__MODULE__, [], name: {:via, Registry, {@registry, "reclaimer"}}) do
|
||||
{:ok, pid} ->
|
||||
pid
|
||||
|
||||
{:error, {:already_registered, pid}} ->
|
||||
pid
|
||||
end
|
||||
|
||||
{pid, Process.monitor(pid)}
|
||||
end
|
||||
|
||||
@impl true
|
||||
def init(_) do
|
||||
{:ok, nil, {:continue, :reclaim}}
|
||||
end
|
||||
|
||||
@impl true
|
||||
def handle_continue(:reclaim, _) do
|
||||
max_connections = Pleroma.Config.get([:connections_pool, :max_connections])
|
||||
|
||||
reclaim_max =
|
||||
[:connections_pool, :reclaim_multiplier]
|
||||
|> Pleroma.Config.get()
|
||||
|> Kernel.*(max_connections)
|
||||
|> round
|
||||
|> max(1)
|
||||
|
||||
:telemetry.execute([:pleroma, :connection_pool, :reclaim, :start], %{}, %{
|
||||
max_connections: max_connections,
|
||||
reclaim_max: reclaim_max
|
||||
})
|
||||
|
||||
# :ets.fun2ms(
|
||||
# fn {_, {worker_pid, {_, used_by, crf, last_reference}}} when used_by == [] ->
|
||||
# {worker_pid, crf, last_reference} end)
|
||||
unused_conns =
|
||||
Registry.select(
|
||||
@registry,
|
||||
[
|
||||
{{:_, :"$1", {:_, :"$2", :"$3", :"$4"}}, [{:==, :"$2", []}], [{{:"$1", :"$3", :"$4"}}]}
|
||||
]
|
||||
)
|
||||
|
||||
case unused_conns do
|
||||
[] ->
|
||||
:telemetry.execute(
|
||||
[:pleroma, :connection_pool, :reclaim, :stop],
|
||||
%{reclaimed_count: 0},
|
||||
%{
|
||||
max_connections: max_connections
|
||||
}
|
||||
)
|
||||
|
||||
{:stop, :no_unused_conns, nil}
|
||||
|
||||
unused_conns ->
|
||||
reclaimed =
|
||||
unused_conns
|
||||
|> Enum.sort(fn {_pid1, crf1, last_reference1}, {_pid2, crf2, last_reference2} ->
|
||||
crf1 <= crf2 and last_reference1 <= last_reference2
|
||||
end)
|
||||
|> Enum.take(reclaim_max)
|
||||
|
||||
reclaimed
|
||||
|> Enum.each(fn {pid, _, _} ->
|
||||
DynamicSupervisor.terminate_child(Pleroma.Gun.ConnectionPool.WorkerSupervisor, pid)
|
||||
end)
|
||||
|
||||
:telemetry.execute(
|
||||
[:pleroma, :connection_pool, :reclaim, :stop],
|
||||
%{reclaimed_count: Enum.count(reclaimed)},
|
||||
%{max_connections: max_connections}
|
||||
)
|
||||
|
||||
{:stop, :normal, nil}
|
||||
end
|
||||
end
|
||||
end
|
||||
|
|
@ -29,89 +29,16 @@ def start_worker(opts, retry \\ false) do
|
|||
end
|
||||
end
|
||||
|
||||
@registry Pleroma.Gun.ConnectionPool
|
||||
@enforcer_key "enforcer"
|
||||
defp free_pool do
|
||||
case Registry.lookup(@registry, @enforcer_key) do
|
||||
[] ->
|
||||
pid =
|
||||
spawn(fn ->
|
||||
{:ok, _pid} = Registry.register(@registry, @enforcer_key, nil)
|
||||
max_connections = Pleroma.Config.get([:connections_pool, :max_connections])
|
||||
|
||||
reclaim_max =
|
||||
[:connections_pool, :reclaim_multiplier]
|
||||
|> Pleroma.Config.get()
|
||||
|> Kernel.*(max_connections)
|
||||
|> round
|
||||
|> max(1)
|
||||
|
||||
:telemetry.execute([:pleroma, :connection_pool, :reclaim, :start], %{}, %{
|
||||
max_connections: max_connections,
|
||||
reclaim_max: reclaim_max
|
||||
})
|
||||
|
||||
# :ets.fun2ms(
|
||||
# fn {_, {worker_pid, {_, used_by, crf, last_reference}}} when used_by == [] ->
|
||||
# {worker_pid, crf, last_reference} end)
|
||||
unused_conns =
|
||||
Registry.select(
|
||||
@registry,
|
||||
[
|
||||
{{:_, :"$1", {:_, :"$2", :"$3", :"$4"}}, [{:==, :"$2", []}],
|
||||
[{{:"$1", :"$3", :"$4"}}]}
|
||||
]
|
||||
)
|
||||
|
||||
case unused_conns do
|
||||
[] ->
|
||||
:telemetry.execute(
|
||||
[:pleroma, :connection_pool, :reclaim, :stop],
|
||||
%{reclaimed_count: 0},
|
||||
%{
|
||||
max_connections: max_connections
|
||||
}
|
||||
)
|
||||
|
||||
exit(:no_unused_conns)
|
||||
|
||||
unused_conns ->
|
||||
reclaimed =
|
||||
unused_conns
|
||||
|> Enum.sort(fn {_pid1, crf1, last_reference1},
|
||||
{_pid2, crf2, last_reference2} ->
|
||||
crf1 <= crf2 and last_reference1 <= last_reference2
|
||||
end)
|
||||
|> Enum.take(reclaim_max)
|
||||
|
||||
reclaimed
|
||||
|> Enum.each(fn {pid, _, _} ->
|
||||
DynamicSupervisor.terminate_child(__MODULE__, pid)
|
||||
end)
|
||||
|
||||
:telemetry.execute(
|
||||
[:pleroma, :connection_pool, :reclaim, :stop],
|
||||
%{reclaimed_count: Enum.count(reclaimed)},
|
||||
%{max_connections: max_connections}
|
||||
)
|
||||
end
|
||||
end)
|
||||
|
||||
wait_for_enforcer_finish(pid)
|
||||
|
||||
[{pid, _}] ->
|
||||
wait_for_enforcer_finish(pid)
|
||||
end
|
||||
wait_for_reclaimer_finish(Pleroma.Gun.ConnectionPool.Reclaimer.start_monitor())
|
||||
end
|
||||
|
||||
defp wait_for_enforcer_finish(pid) do
|
||||
ref = Process.monitor(pid)
|
||||
|
||||
defp wait_for_reclaimer_finish({pid, mon}) do
|
||||
receive do
|
||||
{:DOWN, ^ref, :process, ^pid, :no_unused_conns} ->
|
||||
{:DOWN, ^mon, :process, ^pid, :no_unused_conns} ->
|
||||
:error
|
||||
|
||||
{:DOWN, ^ref, :process, ^pid, :normal} ->
|
||||
{:DOWN, ^mon, :process, ^pid, :normal} ->
|
||||
:ok
|
||||
end
|
||||
end
|
||||
|
|
|
|||
Loading…
Reference in a new issue