File fix-zmq-hang-backport-of-saltstack-salt-58364.patch of Package salt.21019

From 6c5849367ae0ba2fcae8d7579b9f8b2c432fc0c6 Mon Sep 17 00:00:00 2001
From: Alexander Graul <agraul@suse.com>
Date: Mon, 29 Mar 2021 15:53:07 +0200
Subject: [PATCH] Fix zmq hang (backport of saltstack/salt#58364)

Fixes bsc#1181368

(cherry picked from commit 4abaaee815e3e845180ad7bd1111c5ee99f219ff)
---
 salt/scripts.py                     | 21 ++++++++++++++++-----
 salt/transport/zeromq.py            | 14 ++++++++++++++
 tests/unit/transport/test_zeromq.py | 24 +++++++++++++++++++++++-
 3 files changed, 53 insertions(+), 6 deletions(-)

diff --git a/salt/scripts.py b/salt/scripts.py
index 401ec20553..a1ea3e6966 100644
--- a/salt/scripts.py
+++ b/salt/scripts.py
@@ -438,11 +438,22 @@ def salt_call():
     salt minion to run.
     '''
     import salt.cli.call
-    if '' in sys.path:
-        sys.path.remove('')
-    client = salt.cli.call.SaltCall()
-    _install_signal_handlers(client)
-    client.run()
+
+    try:
+        from salt.transport import zeromq
+    except ImportError:
+        zeromq = None
+
+    try:
+        if "" in sys.path:
+            sys.path.remove("")
+        client = salt.cli.call.SaltCall()
+        _install_signal_handlers(client)
+        client.run()
+    finally:
+        if zeromq is not None:
+            zeromq.AsyncZeroMQReqChannel.force_close_all_instances()
+
 
 
 def salt_run():
diff --git a/salt/transport/zeromq.py b/salt/transport/zeromq.py
index f8098b3121..a5844e9132 100644
--- a/salt/transport/zeromq.py
+++ b/salt/transport/zeromq.py
@@ -213,6 +213,20 @@ class AsyncZeroMQReqChannel(salt.transport.client.ReqChannel):
                                                         kwargs={'io_loop': self._io_loop})
         self._closing = False
 
+    @classmethod
+    def force_close_all_instances(cls):
+        """
+        Will force close all instances
+
+        ZMQ can hang on quit if left to deconstruct on its own.
+        This because is deconstructs out of order.
+
+        :return: None
+        """
+        for weak_dict in list(cls.instance_map.values()):
+            for instance in list(weak_dict.values()):
+                instance.close()
+
     def close(self):
         '''
         Since the message_client creates sockets and assigns them to the IOLoop we have to
diff --git a/tests/unit/transport/test_zeromq.py b/tests/unit/transport/test_zeromq.py
index 2e540bdff0..a68de7c21c 100644
--- a/tests/unit/transport/test_zeromq.py
+++ b/tests/unit/transport/test_zeromq.py
@@ -44,7 +44,7 @@ from tests.support.runtests import RUNTIME_VARS
 from tests.support.unit import TestCase, skipIf
 from tests.support.helpers import flaky, get_unused_localhost_port
 from tests.support.mixins import AdaptedConfigurationTestCaseMixin
-from tests.support.mock import MagicMock, patch
+from tests.support.mock import MagicMock, call, patch
 from tests.unit.transport.mixins import PubChannelMixin, ReqChannelMixin, run_loop_in_thread
 
 ON_SUSE = False
@@ -676,3 +676,25 @@ class PubServerChannel(TestCase, AdaptedConfigurationTestCaseMixin):
         gather.join()
         server_channel.pub_close()
         assert len(results) == send_num, (len(results), set(expect).difference(results))
+
+
+class AsyncZeroMQReqChannelTests(TestCase):
+    def test_force_close_all_instances(self):
+        zmq1 = MagicMock()
+        zmq2 = MagicMock()
+        zmq3 = MagicMock()
+        zmq_objects = {"zmq": {"1": zmq1, "2": zmq2}, "other_zmq": {"3": zmq3}}
+
+        with patch(
+            "salt.transport.zeromq.AsyncZeroMQReqChannel.instance_map", zmq_objects
+        ):
+            salt.transport.zeromq.AsyncZeroMQReqChannel.force_close_all_instances()
+
+            self.assertEqual(zmq1.mock_calls, [call.close()])
+            self.assertEqual(zmq2.mock_calls, [call.close()])
+            self.assertEqual(zmq3.mock_calls, [call.close()])
+
+            # check if instance map changed
+            self.assertIs(
+                zmq_objects, salt.transport.zeromq.AsyncZeroMQReqChannel.instance_map
+            )
-- 
2.30.2