From 7ddea787bc62ef72679aa3f164bced3e1d63a0ce Mon Sep 17 00:00:00 2001
From: Jian Li <pyguni@gmail.com>
Date: Fri, 30 Mar 2018 11:17:42 +0900
Subject: [PATCH] Fix: resolve NPE when inject non-existing compute node
 through SONA

Change-Id: I4b828c0c8e303bc1c27854899a5dc568a8be55cb
---
 .../impl/OpenstackSwitchingHostProvider.java                   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSwitchingHostProvider.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSwitchingHostProvider.java
index 0c2ea3962d..14ee117123 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSwitchingHostProvider.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSwitchingHostProvider.java
@@ -292,6 +292,9 @@ public final class OpenstackSwitchingHostProvider extends AbstractProvider imple
         public boolean isRelevant(OpenstackNodeEvent event) {
             // do not allow to proceed without mastership
             Device device = deviceService.getDevice(event.subject().intgBridge());
+            if (device == null) {
+                return false;
+            }
             return mastershipService.isLocalMaster(device.id());
         }