From 0d0f344d65575065f00c8db070511e650415bf6d Mon Sep 17 00:00:00 2001
From: Ahmed Hussein <a@ahussein.me>
Date: Tue, 31 Aug 2021 15:58:06 -0500
Subject: [PATCH] HDFS-15160. amend to fix javac error supressing unchecked
 warning

---
 .../hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
index 7adcd8e2f14..045c8cd2eec 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
@@ -201,16 +201,16 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
    * The deepCopyReplica call doesn't use the datasetock since it will lead the
    * potential deadlock with the {@link FsVolumeList#addBlockPool} call.
    */
+  @SuppressWarnings("unchecked")
   @Override
   public Set<? extends Replica> deepCopyReplica(String bpid)
       throws IOException {
-    Set<? extends Replica> replicas = null;
+    Set<? extends Replica> replicas;
     try (AutoCloseableLock lock = datasetReadLock.acquire()) {
       replicas =
           new HashSet<>(volumeMap.replicas(bpid) == null ? Collections.EMPTY_SET
               : volumeMap.replicas(bpid));
     }
-
     return Collections.unmodifiableSet(replicas);
   }