From 4da62419288bd3f6f70875be1a822ca6b78afb6e Mon Sep 17 00:00:00 2001
From: Matthew Trew <matthew.trew@raspberrypi.org>
Date: Thu, 18 Jun 2026 14:46:12 +0200
Subject: [PATCH] Re-open Semantic Logger appenders in Cluster mode

This missing config meant Semantic Logger was not working in prod, where
we use Puma in Cluster mode.

See https://logger.rocketjob.io/forking.html#puma
---
 config/puma.rb | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/config/puma.rb b/config/puma.rb
index 71f0f48ff..0f6ac3ebb 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -38,6 +38,11 @@
 
   workers worker_count
 
+  before_worker_boot do
+    # Re-open appenders after forking the process
+    SemanticLogger.reopen
+  end
+
   # Use the `preload_app!` method when specifying a `workers` number.
   # This directive tells Puma to first boot the application and load code
   # before forking the application. This takes advantage of Copy On Write
@@ -48,3 +53,5 @@
 
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart
+
+