3 files changed, 19 insertions, 9 deletions
diff --git a/lib/rubygems/request/connection_pools.rb b/lib/rubygems/request/connection_pools.rb
index 38f8db4ce0..01e7e0629a 100644
--- a/lib/rubygems/request/connection_pools.rb
+++ b/lib/rubygems/request/connection_pools.rb
@@ -1,17 +1,18 @@
 # frozen_string_literal: true
 
 class Gem::Request::ConnectionPools # :nodoc:
-  @client = Net::HTTP
+  @client = Gem::Net::HTTP
 
   class << self
     attr_accessor :client
   end
 
-  def initialize(proxy_uri, cert_files)
+  def initialize(proxy_uri, cert_files, pool_size = 1)
     @proxy_uri  = proxy_uri
     @cert_files = cert_files
     @pools      = {}
     @pool_mutex = Thread::Mutex.new
+    @pool_size  = pool_size
   end
 
   def pool_for(uri)
@@ -20,15 +21,15 @@ class Gem::Request::ConnectionPools # :nodoc:
     @pool_mutex.synchronize do
       @pools[key] ||=
         if https? uri
-          Gem::Request::HTTPSPool.new(http_args, @cert_files, @proxy_uri)
+          Gem::Request::HTTPSPool.new(http_args, @cert_files, @proxy_uri, @pool_size)
         else
-          Gem::Request::HTTPPool.new(http_args, @cert_files, @proxy_uri)
+          Gem::Request::HTTPPool.new(http_args, @cert_files, @proxy_uri, @pool_size)
         end
     end
   end
 
   def close_all
-    @pools.each_value {|pool| pool.close_all }
+    @pools.each_value(&:close_all)
   end
 
   private
diff --git a/lib/rubygems/request/http_pool.rb b/lib/rubygems/request/http_pool.rb
index 7b309eedd3..468502ca6b 100644
--- a/lib/rubygems/request/http_pool.rb
+++ b/lib/rubygems/request/http_pool.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 ##
 # A connection "pool" that only manages one connection for now.  Provides
 # thread safe `checkout` and `checkin` methods.  The pool consists of one
@@ -8,12 +9,14 @@
 class Gem::Request::HTTPPool # :nodoc:
   attr_reader :cert_files, :proxy_uri
 
-  def initialize(http_args, cert_files, proxy_uri)
+  def initialize(http_args, cert_files, proxy_uri, pool_size)
     @http_args  = http_args
     @cert_files = cert_files
     @proxy_uri  = proxy_uri
-    @queue      = Thread::SizedQueue.new 1
-    @queue << nil
+    @pool_size  = pool_size
+
+    @queue      = Thread::SizedQueue.new @pool_size
+    setup_queue
   end
 
   def checkout
@@ -30,7 +33,8 @@ class Gem::Request::HTTPPool # :nodoc:
         connection.finish
       end
     end
-    @queue.push(nil)
+
+    setup_queue
   end
 
   private
@@ -43,4 +47,8 @@ class Gem::Request::HTTPPool # :nodoc:
     connection.start
     connection
   end
+
+  def setup_queue
+    @pool_size.times { @queue.push(nil) }
+  end
 end
diff --git a/lib/rubygems/request/https_pool.rb b/lib/rubygems/request/https_pool.rb
index 50f42d9e0d..cb1d4b59b6 100644
--- a/lib/rubygems/request/https_pool.rb
+++ b/lib/rubygems/request/https_pool.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 class Gem::Request::HTTPSPool < Gem::Request::HTTPPool # :nodoc:
   private