X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/0ef7495b59056c8f115a42bd843ce432c9282e8c..cdd8dc7bc4cca452e25c5b014e5f2bb592fb31ce:/services/api/app/middlewares/rack_socket.rb

diff --git a/services/api/app/middlewares/rack_socket.rb b/services/api/app/middlewares/rack_socket.rb
index 19350c40e6..08d163e6e2 100644
--- a/services/api/app/middlewares/rack_socket.rb
+++ b/services/api/app/middlewares/rack_socket.rb
@@ -44,18 +44,26 @@ class RackSocket
         if forked && EM.reactor_running?
           EM.stop
         end
-        Thread.new {
-          EM.run
-        }
+        Thread.new do
+          begin
+            EM.run
+          ensure
+            ActiveRecord::Base.connection.close
+          end
+        end
         die_gracefully_on_signal
       end
     else
       # faciliates debugging
       Thread.abort_on_exception = true
       # just spawn a thread and start it up
-      Thread.new {
-        EM.run
-      }
+      Thread.new do
+        begin
+          EM.run
+        ensure
+          ActiveRecord::Base.connection.close
+        end
+      end
     end
 
     # Create actual handler instance object from handler class.
@@ -69,6 +77,10 @@ class RackSocket
   def call env
     request = Rack::Request.new(env)
     if request.path_info == @endpoint and Faye::WebSocket.websocket?(env)
+      if @handler.overloaded?
+        return [503, {"Content-Type" => "text/plain"}, ["Too many connections, try again later."]]
+      end
+
       ws = Faye::WebSocket.new(env, nil, :ping => 30)
 
       # Notify handler about new connection