Code change to check if any exception was raised in the threads and p…

…ropogate it back to parent process.

config/main.py

@@ -117,14 +117,15 @@ def get_command(self, ctx, cmd_name):
 #
 
 # Execute action per NPU instance for multi instance services.
-def execute_asic_instance(inst, multi_inst_list, action):
+def execute_asic_instance(inst, event, multi_inst_list, action):
     for service in multi_inst_list:
         try:
             click.echo("Executing {} of service {}@{}...".format(action, service, inst))
             run_command("systemctl {} {}@{}.service".format(action, service, inst))
         except SystemExit as e:
             log_error("Failed to execute {} of service {}@{} with error {}".format(action, service, inst, e))
-            raise
+            # Set the event object if there is a failure and exception was raised.
+            event.set()
 
 # Execute action on list of systemd services
 def execute_systemctl(list_of_services, action):
@@ -152,16 +153,22 @@ def execute_systemctl(list_of_services, action):
     # With Multi NPU, Start a thread per instance to do the "action" on multi instance services.
     if sonic_device_util.is_multi_npu():
         threads = []
+        # Use this event object to co-ordinate if any threads raised exception
+        e = threading.Event()
         kwargs = {'multi_inst_list' : multi_inst_service_list, 'action' : action}
         for inst in range(num_asic):
-            t = threading.Thread(target=execute_asic_instance, args=(inst,), kwargs=kwargs)
+            t = threading.Thread(target=execute_asic_instance, args=(inst,e), kwargs=kwargs)
             threads.append(t)
             t.start()
 
         # Wait for all the threads to finish.
         for inst in range(num_asic):
             threads[inst].join()
 
+            # Check if any of the threads have raised exception, if so exit the process.
+            if e.is_set():
+              sys.exit(1)
+
 def run_command(command, display_cmd=False, ignore_error=False):
     """Run bash command and print output to stdout
     """