updater: Stop trying to quarantine missing asyncs

Change-Id: Iece49d059a4d81d203e83319cfe142e4750f855a

swift/obj/updater.py

@@ -348,7 +348,9 @@ class ObjectUpdater(Daemon):
         """
         try:
             update = pickle.load(open(update_path, 'rb'))
-        except Exception:
+        except Exception as e:
+            if getattr(e, 'errno', None) == errno.ENOENT:
+                return
             self.logger.exception(
                 _('ERROR Pickle problem, quarantining %s'), update_path)
             self.stats.quarantines += 1
@@ -356,6 +358,13 @@ class ObjectUpdater(Daemon):
             target_path = os.path.join(device, 'quarantined', 'objects',
                                        os.path.basename(update_path))
             renamer(update_path, target_path, fsync=False)
+            try:
+                # If this was the last async_pending in the directory,
+                # then this will succeed. Otherwise, it'll fail, and
+                # that's okay.
+                os.rmdir(os.path.dirname(update_path))
+            except OSError:
+                pass
             return
 
         def do_update():

test/unit/obj/test_updater.py

@@ -647,7 +647,6 @@ class TestObjectUpdater(unittest.TestCase):
                                       data, timestamp, policy)
 
     def test_obj_put_async_updates(self):
-        ts_iter = make_timestamp_iter()
         policies = list(POLICIES)
         random.shuffle(policies)
 
@@ -664,8 +663,8 @@ class TestObjectUpdater(unittest.TestCase):
         def do_test(headers_out, expected, container_path=None):
             # write an async
             dfmanager = DiskFileManager(conf, daemon.logger)
-            self._write_async_update(dfmanager, next(ts_iter), policies[0],
-                                     headers=headers_out,
+            self._write_async_update(dfmanager, next(self.ts_iter),
+                                     policies[0], headers=headers_out,
                                      container_path=container_path)
             request_log = []
 
@@ -691,7 +690,7 @@ class TestObjectUpdater(unittest.TestCase):
             self.assertFalse(os.listdir(async_dir))
             daemon.logger.clear()
 
-        ts = next(ts_iter)
+        ts = next(self.ts_iter)
         # use a dict rather than HeaderKeyDict so we can vary the case of the
         # pickled headers
         headers_out = {
@@ -1153,6 +1152,69 @@ class TestObjectUpdater(unittest.TestCase):
             daemon.logger.get_increment_counts())
         self.assertFalse(os.listdir(async_dir))  # no async file
 
+    def test_obj_update_quarantine(self):
+        policies = list(POLICIES)
+        random.shuffle(policies)
+
+        # setup updater
+        conf = {
+            'devices': self.devices_dir,
+            'mount_check': 'false',
+            'swift_dir': self.testdir,
+        }
+        daemon = object_updater.ObjectUpdater(conf, logger=self.logger)
+        async_dir = os.path.join(self.sda1, get_async_dir(policies[0]))
+        os.mkdir(async_dir)
+
+        ohash = hash_path('a', 'c', 'o')
+        odir = os.path.join(async_dir, ohash[-3:])
+        mkdirs(odir)
+        op_path = os.path.join(
+            odir,
+            '%s-%s' % (ohash, next(self.ts_iter).internal))
+        with open(op_path, 'wb') as async_pending:
+            async_pending.write(b'\xff')  # invalid pickle
+
+        with mocked_http_conn():
+            with mock.patch('swift.obj.updater.dump_recon_cache'):
+                daemon.run_once()
+
+        self.assertEqual(
+            {'quarantines': 1},
+            daemon.logger.get_increment_counts())
+        self.assertFalse(os.listdir(async_dir))  # no asyncs
+
+    def test_obj_update_gone_missing(self):
+        # if you've got multiple updaters running (say, both a background
+        # and foreground process), process_object_update may get a file
+        # that doesn't exist
+        policies = list(POLICIES)
+        random.shuffle(policies)
+
+        # setup updater
+        conf = {
+            'devices': self.devices_dir,
+            'mount_check': 'false',
+            'swift_dir': self.testdir,
+        }
+        daemon = object_updater.ObjectUpdater(conf, logger=self.logger)
+        async_dir = os.path.join(self.sda1, get_async_dir(policies[0]))
+        os.mkdir(async_dir)
+
+        ohash = hash_path('a', 'c', 'o')
+        odir = os.path.join(async_dir, ohash[-3:])
+        mkdirs(odir)
+        op_path = os.path.join(
+            odir,
+            '%s-%s' % (ohash, next(self.ts_iter).internal))
+
+        with mocked_http_conn():
+            with mock.patch('swift.obj.updater.dump_recon_cache'):
+                daemon.process_object_update(op_path, self.sda1, policies[0])
+        self.assertEqual({}, daemon.logger.get_increment_counts())
+        self.assertEqual(os.listdir(async_dir), [ohash[-3:]])
+        self.assertFalse(os.listdir(odir))
+
 
 if __name__ == '__main__':
     unittest.main()