FIX: run reaper after fork

config/initializers/99-drain_pool.rb

@@ -1,13 +1,2 @@
 # pg performs inconsistently with large amounts of connections
-# this helps keep connection counts in check
-Thread.new do
-  while true
-    sleep 30
-    pools = []
-    ObjectSpace.each_object(ActiveRecord::ConnectionAdapters::ConnectionPool){|pool| pools << pool}
-
-    pools.each do |pool|
-      pool.drain(30.seconds)
-    end
-  end
-end
+Discourse.start_connection_reaper

lib/discourse.rb

@@ -258,9 +258,25 @@ module Discourse
     Sidekiq.redis_pool.shutdown{|c| nil}
     # re-establish
     Sidekiq.redis = sidekiq_redis_config
+    start_connection_reaper
     nil
   end
 
+  def self.start_connection_reaper(interval=30, age=30)
+    # this helps keep connection counts in check
+    Thread.new do
+      while true
+        sleep interval
+        pools = []
+        ObjectSpace.each_object(ActiveRecord::ConnectionAdapters::ConnectionPool){|pool| pools << pool}
+
+        pools.each do |pool|
+          pool.drain(age.seconds)
+        end
+      end
+    end
+  end
+
   def self.sidekiq_redis_config
     { url: $redis.url, namespace: 'sidekiq' }
   end