[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: #9055 change-id: cid-9bdff81ddb569654f4a9a61862d4e3f05aeaf810
Alluxio · May 11, 2019 · ae0816c · ae0816c
1 parent 475aab7
commit ae0816c
Showing 1 changed file with 2 additions and 0 deletions.
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
@@ -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) {