diff --git a/neutron/agent/linux/ip_lib.py b/neutron/agent/linux/ip_lib.py
index cae6991d1d3..e3cbe6b94c5 100644
--- a/neutron/agent/linux/ip_lib.py
+++ b/neutron/agent/linux/ip_lib.py
@@ -125,12 +125,21 @@ class IPWrapper(SubProcessBase):
             # we call out manually because in order to avoid screen scraping
             # iproute2 we use find to see what is in the sysfs directory, as
             # suggested by Stephen Hemminger (iproute2 dev).
-            output = utils.execute(['ip', 'netns', 'exec', self.namespace,
-                                    'find', SYS_NET_PATH, '-maxdepth', '1',
-                                    '-type', 'l', '-printf', '%f '],
-                                   run_as_root=True,
-                                   log_fail_as_error=self.log_fail_as_error
-                                   ).split()
+            try:
+                cmd = ['ip', 'netns', 'exec', self.namespace,
+                       'find', SYS_NET_PATH, '-maxdepth', '1',
+                       '-type', 'l', '-printf', '%f ']
+                output = utils.execute(
+                    cmd,
+                    run_as_root=True,
+                    log_fail_as_error=self.log_fail_as_error).split()
+            except RuntimeError:
+                # We could be racing with a cron job deleting namespaces.
+                # Just return a empty list if the namespace is deleted.
+                with excutils.save_and_reraise_exception() as ctx:
+                    if not self.netns.exists(self.namespace):
+                        ctx.reraise = False
+                        return []
         else:
             output = (
                 i for i in os.listdir(SYS_NET_PATH)
diff --git a/neutron/tests/unit/agent/linux/test_ip_lib.py b/neutron/tests/unit/agent/linux/test_ip_lib.py
index 58a5ed6c218..20f1cce70ca 100644
--- a/neutron/tests/unit/agent/linux/test_ip_lib.py
+++ b/neutron/tests/unit/agent/linux/test_ip_lib.py
@@ -282,6 +282,24 @@ class TestIpWrapper(base.BaseTestCase):
         self.assertTrue(fake_str.split.called)
         self.assertEqual(retval, [ip_lib.IPDevice('lo', namespace='foo')])
 
+    @mock.patch('neutron.agent.common.utils.execute')
+    def test_get_devices_namespaces_ns_not_exists(self, mocked_execute):
+        mocked_execute.side_effect = RuntimeError(
+            "Cannot open network namespace")
+        with mock.patch.object(ip_lib.IpNetnsCommand, 'exists',
+                               return_value=False):
+            retval = ip_lib.IPWrapper(namespace='foo').get_devices()
+            self.assertEqual([], retval)
+
+    @mock.patch('neutron.agent.common.utils.execute')
+    def test_get_devices_namespaces_ns_exists(self, mocked_execute):
+        mocked_execute.side_effect = RuntimeError(
+            "Cannot open network namespace")
+        with mock.patch.object(ip_lib.IpNetnsCommand, 'exists',
+                               return_value=True):
+            self.assertRaises(RuntimeError,
+                              ip_lib.IPWrapper(namespace='foo').get_devices)
+
     @mock.patch('neutron.agent.common.utils.execute')
     def test_get_devices_exclude_loopback_and_gre(self, mocked_execute):
         device_name = 'somedevice'