backporting.diff

diff --git a/test/unit/obj/test_ssync.py b/test/unit/obj/test_ssync.py
index e6ed662..38fb876 100644
--- a/test/unit/obj/test_ssync.py
+++ b/test/unit/obj/test_ssync.py
@@ -797,7 +797,11 @@ class TestSsyncECReconstructorSyncJob(TestBaseSsync):
                       log_lines[0])
         self.assertFalse(log_lines[1:])
         # trampoline for the receiver to write a log
-        eventlet.sleep(0)
+        for x in range(2):
+            # In mitaka stable, we need more tranpoline to write a log because
+            # before commit 4c11833a9cbff499725365e535e217f3eae3c442, writing
+            # entier chunk is running in green thread.
+            eventlet.sleep(0)
         log_lines = self.rx_logger.get_lines_for_level('warning')
         self.assertIn('ssync subrequest failed with 499',
                       log_lines[0])
@@ -965,7 +969,11 @@ class TestSsyncECReconstructorSyncJob(TestBaseSsync):
         self.assertFalse(
             self.reconstructor.logger.get_lines_for_level('error'))
         # trampoline for the receiver to write a log
-        eventlet.sleep(0)
+        for x in range(2):
+            # In mitaka stable, we need more tranpoline to write a log because
+            # before commit 4c11833a9cbff499725365e535e217f3eae3c442, writing
+            # entier chunk is running in green thread.
+            eventlet.sleep(0)
         self.assertFalse(self.rx_logger.get_lines_for_level('warning'))
         self.assertFalse(self.rx_logger.get_lines_for_level('error'))