From ae0816c23f26b6ac96e613fc3b8bf1fe6f0e791c Mon Sep 17 00:00:00 2001
From: snowhealing <50495567+snowhealing@users.noreply.github.com>
Date: Sun, 12 May 2019 06:23:08 +0800
Subject: [PATCH] [SMALLFIX]Use the @Nullable annotation

Use the @Nullable annotation for all methods which may return null in
/alluxio/core/server/master/src/main/java/alluxio/master/file/meta/LazyUfsBlockLocationCache.java

pr-link: Alluxio/alluxio#9055
change-id: cid-9bdff81ddb569654f4a9a61862d4e3f05aeaf810
---
 .../alluxio/master/file/meta/LazyUfsBlockLocationCache.java     | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/server/master/src/main/java/alluxio/master/file/meta/LazyUfsBlockLocationCache.java b/core/server/master/src/main/java/alluxio/master/file/meta/LazyUfsBlockLocationCache.java
index 9c790f0fcc63..48ffc3b0bbf0 100644
--- a/core/server/master/src/main/java/alluxio/master/file/meta/LazyUfsBlockLocationCache.java
+++ b/core/server/master/src/main/java/alluxio/master/file/meta/LazyUfsBlockLocationCache.java
@@ -27,6 +27,7 @@
 import java.io.IOException;
 import java.util.List;
 
+import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 
 /**
@@ -65,6 +66,7 @@ public List<String> get(long blockId) {
   }
 
   @Override
+  @Nullable
   public List<String> get(long blockId, AlluxioURI fileUri, long offset) {
     List<String> locations = mCache.getIfPresent(blockId);
     if (locations != null) {