👀 Views: 69 💬 Answers: 1 📅 Created: 2025-06-13

ruby rails actioncable memory-leaks Ruby

I've searched everywhere and can't find a clear answer. I'm currently facing a memory leak issue in my Ruby on Rails application (version 6.1.4) that uses ActionCable for WebSocket connections. After running the application for a few hours, I notice a significant increase in memory usage, often hitting the OOM killer on my server. The issue seems to be related to how I handle subscriptions and broadcasts in my ActionCable channels. In my `ChatChannel` class, I have the following code to manage user subscriptions and broadcasts: ```ruby class ChatChannel < ApplicationCable::Channel def subscribed stream_from "chat_#{params[:room]}.stream" current_user.join_room(params[:room]) # Custom method to track users in a room end def unsubscribed current_user.leave_room(params[:room]) # Custom method to clean up user data end def send_message(data) ActionCable.server.broadcast("chat_#{params[:room]}.stream", message: data['message'], user: current_user.username) end end ``` I also have a custom `CurrentUser` class that holds user data, but I'm concerned about how I'm managing this data across multiple connections. I've tried using `ActionCable.server.connections` to check for active connections and clean up, but it doesn't seem to help with the memory usage. I've also added a few logging statements to track when users are subscribing and unsubscribing, and I haven't seen any issues with that. I've considered using a garbage collection strategy by forcing garbage collection in my production environment, but I know that it's not a best practice and might lead to performance issues. Have anyone experienced similar issues with ActionCable, and what strategies did you use to diagnose and resolve memory leaks? Any insights into best practices for managing WebSocket connections would be greatly appreciated. What am I doing wrong? Any suggestions would be helpful. I've been using Ruby for about a year now. I'm using Ruby stable in this project.