diff --git a/redisson-spring-boot-starter/src/main/java/org/redisson/spring/starter/RedissonAutoConfiguration.java b/redisson-spring-boot-starter/src/main/java/org/redisson/spring/starter/RedissonAutoConfiguration.java
index 1d1bee072..61ac7eed5 100644
--- a/redisson-spring-boot-starter/src/main/java/org/redisson/spring/starter/RedissonAutoConfiguration.java
+++ b/redisson-spring-boot-starter/src/main/java/org/redisson/spring/starter/RedissonAutoConfiguration.java
@@ -74,7 +74,9 @@ public class RedissonAutoConfiguration {
         Method timeoutMethod = ReflectionUtils.findMethod(RedisProperties.class, "getTimeout");
         Object timeoutValue = ReflectionUtils.invokeMethod(timeoutMethod, redisProperties);
         int timeout;
-        if (!(timeoutValue instanceof Integer)) {
+        if(null == timeoutValue){
+            timeout = 0;
+        }else if (!(timeoutValue instanceof Integer)) {
             Method millisMethod = ReflectionUtils.findMethod(timeoutValue.getClass(), "toMillis");
             timeout = ((Long) ReflectionUtils.invokeMethod(millisMethod, timeoutValue)).intValue();
         } else {
diff --git a/redisson/src/main/java/org/redisson/connection/SentinelConnectionManager.java b/redisson/src/main/java/org/redisson/connection/SentinelConnectionManager.java
index 641cb15c1..dc6db1e7e 100755
--- a/redisson/src/main/java/org/redisson/connection/SentinelConnectionManager.java
+++ b/redisson/src/main/java/org/redisson/connection/SentinelConnectionManager.java
@@ -371,8 +371,11 @@ public class SentinelConnectionManager extends MasterSlaveConnectionManager {
                             Set<String> removedSlaves = new HashSet<String>(slaves);
                             removedSlaves.removeAll(currentSlaves);
                             for (String slave : removedSlaves) {
-                                String[] parts = slave.replace("redis://", "").split(":");
-                                slaveDown(parts[0], parts[1]);
+                                String hostPort = slave.replace("redis://", "");
+                                int lastColonIdx = hostPort.lastIndexOf(":");
+                                String host = hostPort.substring(0, lastColonIdx);
+                                String port = hostPort.substring(lastColonIdx + 1);
+                                slaveDown(host, port);
                             }
                         };
                     };