From 02f79731a9f18a0e632d16fe856134f8ced62b59 Mon Sep 17 00:00:00 2001
From: Colin McDonald <cmcdonald.main@gmail.com>
Date: Mon, 25 Jul 2016 15:49:22 -0400
Subject: [PATCH] Fix UserSessionUtils#invalidateAllSessions with no active
 sessions

---
 .../java/net/frozenorb/apiv3/util/UserSessionUtils.java  | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/main/java/net/frozenorb/apiv3/util/UserSessionUtils.java b/src/main/java/net/frozenorb/apiv3/util/UserSessionUtils.java
index c79bdd9..e9d537c 100644
--- a/src/main/java/net/frozenorb/apiv3/util/UserSessionUtils.java
+++ b/src/main/java/net/frozenorb/apiv3/util/UserSessionUtils.java
@@ -71,7 +71,14 @@ public class UserSessionUtils {
 				return;
 			}
 
-			redisClient.delMany((List<String>) result.result().getList(), (result2) -> {
+			List<String> sessions = (List<String>) result.result().getList();
+
+			if (sessions.isEmpty()) {
+				callback.onResult(null, null);
+				return;
+			}
+
+			redisClient.delMany(sessions, (result2) -> {
 				if (result2.succeeded()) {
 					callback.onResult(null, null);
 				} else {