1b15cb066c
While running this in production I noticed a number of ghost processes with all their clients dead before they released the connection, so let's track them to log it and remove them from clients
76 lines
2.2 KiB
Elixir
76 lines
2.2 KiB
Elixir
defmodule Pleroma.Telemetry.Logger do
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@moduledoc "Transforms Pleroma telemetry events to logs"
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require Logger
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@events [
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[:pleroma, :connection_pool, :reclaim, :start],
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[:pleroma, :connection_pool, :reclaim, :stop],
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[:pleroma, :connection_pool, :provision_failure],
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[:pleroma, :connection_pool, :client_death]
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]
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def attach do
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:telemetry.attach_many("pleroma-logger", @events, &handle_event/4, [])
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end
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# Passing anonymous functions instead of strings to logger is intentional,
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# that way strings won't be concatenated if the message is going to be thrown
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# out anyway due to higher log level configured
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def handle_event(
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[:pleroma, :connection_pool, :reclaim, :start],
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_,
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%{max_connections: max_connections, reclaim_max: reclaim_max},
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_
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) do
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Logger.debug(fn ->
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"Connection pool is exhausted (reached #{max_connections} connections). Starting idle connection cleanup to reclaim as much as #{
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reclaim_max
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} connections"
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end)
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end
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def handle_event(
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[:pleroma, :connection_pool, :reclaim, :stop],
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%{reclaimed_count: 0},
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_,
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_
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) do
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Logger.error(fn ->
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"Connection pool failed to reclaim any connections due to all of them being in use. It will have to drop requests for opening connections to new hosts"
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end)
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end
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def handle_event(
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[:pleroma, :connection_pool, :reclaim, :stop],
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%{reclaimed_count: reclaimed_count},
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_,
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_
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) do
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Logger.debug(fn -> "Connection pool cleaned up #{reclaimed_count} idle connections" end)
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end
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def handle_event(
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[:pleroma, :connection_pool, :provision_failure],
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%{opts: [key | _]},
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_,
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_
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) do
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Logger.error(fn ->
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"Connection pool had to refuse opening a connection to #{key} due to connection limit exhaustion"
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end)
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end
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def handle_event(
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[:pleroma, :connection_pool, :client_death],
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%{client_pid: client_pid, reason: reason},
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%{key: key},
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_
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) do
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Logger.warn(fn ->
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"Pool worker for #{key}: Client #{inspect(client_pid)} died before releasing the connection with #{
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inspect(reason)
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}"
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end)
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end
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end
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