File fix-start-task.patch of Package openstack-barbican

From ea1584830bd6491201f042fa50402d73892cff07 Mon Sep 17 00:00:00 2001
From: Adam Spiers <aspiers@suse.com>
Date: Thu, 20 Jul 2017 18:38:24 +0100
Subject: [PATCH] Start task RPC service before waiting

If the TaskServer RPC service is not started before the launcher waits
for its completion, then on shutdown it could result in a hang:

    WARNING oslo_messaging.server Possible hang: stop is waiting for start to complete

This is a port of the fix for Sahara bug #1546119.

Change-Id: I083a85c2ff53364535ac8658677ffa69f4318593
Closes-bug: #1705543
---

diff --git a/barbican/cmd/worker.py b/barbican/cmd/worker.py
index 77ec256..8592bf8 100644
--- a/barbican/cmd/worker.py
+++ b/barbican/cmd/worker.py
@@ -64,11 +64,14 @@
         # Queuing initialization
         queue.init(CONF)
 
-        service.launch(
+        taskserver = server.TaskServer()
+        launcher = service.launch(
             CONF,
-            server.TaskServer(),
+            taskserver,
             workers=CONF.queue.asynchronous_workers
-        ).wait()
+        )
+        taskserver.start()
+        launcher.wait()
     except RuntimeError as e:
         fail(1, e)