mrcly
Run TCP client in a background/non-blocking process
Hi,
i am running a TCP client using gen_tcp inside a GenServer, which is called by DynamicSupervisor using Supervisor.start_client(). Whenever I call this method, the output (which is logged with IO.puts) is blocking the REPL. I start the application via iex -S mix. In the future, it is planned to execute some actions when a specific message is received via TCP, but that’s not implemented currently. However, I need to perform multiple TCP-clients at once and after calling Supervisor.start_client() once, the REPL is blocked and another TCP client cant be spawned.
How can I run this TCP-Client in a background/non-blocking process?
Thanks in advance.
Most Liked
evadne
Do not do the work in init/1. Init is supposed to return quickly. Instead use continuation. See GenServer — Elixir v1.11.4. Return {:ok, state, {:continue, continue}} in your init/1 callback and continue your setup / whatever other sort of blocking operation in handle_continue/2.
entone
Yeah, without seeing your client code, it’s hard to say why it would be blocking. Even a long running init callback shouldn’t block indefinitely.
My guess would be that your making a blocking call from within your init callback.
Popular in Questions
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
Supporting innovation across the BEAM ecosystem.
Categories:
Sub Categories:
Forums
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Practical resources that improve the lives of professional developers.
Develop your skills with books, videos, and courses.
The deployment platform built for Elixir: PaaS ease, VPS control.
Courses that'll move you from confusion to "Aha, now I get it!"