Hackney connection references in process dictionary

ericgoodwin · August 8, 2016, 5:07pm

I am using poolboy to manage a pool of search workers.
Each search worker is a genserver and has a hackney connection in it’s state. For some reason, we’re getting a leak where hackney is keeping connections open. The search processes only have the one connection in the state, but can have quite a few connections in it’s process dictionary.

Here are main parts of the Search module.

gist.github.com

https://gist.github.com/ericgoodwin/0d7dcd9d0f43c75337dc43a5df0423b2

search.ex

defmodule Search do

  use GenServer

  @pool_name :search_pool

  @client_options [pool: false, timeout: 30_000, recv_timeout: 5_000, with_body: true]

  defmodule Config do
    defstruct uri: nil, index: nil, client: nil, headers: [], transport: :hackney_ssl_transport

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Any ideas why we’d be getting a leak with connections staying open in the process library?
Thanks!