RANGER-2661:NullPointerException on RangerRolesProvider.loadUserGroupRoles
diff --git a/agents-common/src/main/java/org/apache/ranger/plugin/service/RangerBasePlugin.java b/agents-common/src/main/java/org/apache/ranger/plugin/service/RangerBasePlugin.java
index 00a23e3..f5cdddf 100644
--- a/agents-common/src/main/java/org/apache/ranger/plugin/service/RangerBasePlugin.java
+++ b/agents-common/src/main/java/org/apache/ranger/plugin/service/RangerBasePlugin.java
@@ -117,7 +117,9 @@
 
 		RangerPolicyEngine policyEngine = this.policyEngine;
 
-		policyEngine.setRoles(roles);
+		if (policyEngine != null) {
+			policyEngine.setRoles(roles);
+		}
 
 		pluginContext.notifyAuthContextChanged();
 	}