diff --git a/common/config.py b/common/config.py
index f8ae075..3aee48f 100644
--- a/common/config.py
+++ b/common/config.py
@@ -130,6 +130,11 @@
                default=30,
                help="Timeout in seconds to wait for adding or removing child"
                     "process after receiving of sighup signal"),
+    cfg.IntOpt('sighup_config_edit_retries',
+               default=10,
+               help='Count of retries to edit config file during sighup. If '
+                    'another worker already edit config file, file can be '
+                    'busy, so need to wait and try edit file again.'),
     cfg.StrOpt('heat-config-notify-script',
                default=('heat-config-notify'),
                help="Path to the script heat-config-notify"),
diff --git a/functional/test_reload_on_sighup.py b/functional/test_reload_on_sighup.py
index cba5386..b014f49 100644
--- a/functional/test_reload_on_sighup.py
+++ b/functional/test_reload_on_sighup.py
@@ -28,8 +28,27 @@
 
     def _set_config_value(self, service, key, value):
         config = configparser.ConfigParser()
-        config.read(self.config_file)
-        config.set(service, key, value)
+
+        # NOTE(prazumovsky): If there are several workers, there can be
+        # situation, when one thread opens self.config_file for writing
+        # (so config_file erases with opening), in that moment other thread
+        # intercepts to this file and try to set config option value, i.e.
+        # write to file, which is already erased by first thread, so,
+        # NoSectionError raised. So, should wait until first thread writes to
+        # config_file.
+        retries_count = self.conf.sighup_config_edit_retries
+        while True:
+            config.read(self.config_file)
+            try:
+                config.set(service, key, value)
+            except configparser.NoSectionError:
+                if retries_count <= 0:
+                    raise
+                retries_count -= 1
+                eventlet.sleep(1)
+            else:
+                break
+
         with open(self.config_file, 'wb') as f:
             config.write(f)