--- old/src/jdk.management/unix/classes/com/sun/management/internal/OperatingSystemImpl.java	2020-01-09 20:39:18.853145249 +0100
+++ new/src/jdk.management/unix/classes/com/sun/management/internal/OperatingSystemImpl.java	2020-01-09 20:39:18.719145109 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -170,7 +170,7 @@
     }
 
     private boolean isCpuSetSameAsHostCpuSet() {
-        if (containerMetrics != null) {
+        if (containerMetrics != null && containerMetrics.getCpuSetCpus() != null) {
             return containerMetrics.getCpuSetCpus().length == getHostConfiguredCpuCount0();
         }
         return false;