Made AMQP backend connection lazy

celery/backends/amqp.py

@@ -6,6 +6,7 @@ from celery.messaging import establish_connection
 from celery.backends.base import BaseBackend
 
 
+
 class AMQPBackend(BaseBackend):
     """AMQP backend. Publish results by sending messages to the broker
     using the task id as routing key.
@@ -18,12 +19,18 @@ class AMQPBackend(BaseBackend):
 
     exchange = conf.RESULT_EXCHANGE
     capabilities = ["ResultStore"]
+    _connection = None
 
     def __init__(self, *args, **kwargs):
         super(AMQPBackend, self).__init__(*args, **kwargs)
-        self.connection = establish_connection()
         self._cache = {}
 
+    @property
+    def connection(self):
+        if not self._connection:
+            self._connection = establish_connection()
+        return self._connection
+
     def _declare_queue(self, task_id, connection):
         routing_key = task_id.replace("-", "")
         backend = connection.create_backend()