haiyang1987 commented on code in PR #6721:
URL: https://github.com/apache/hadoop/pull/6721#discussion_r1561931239
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hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/PeerCache.java:
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@@ -155,7 +155,7 @@ public Peer get(DatanodeID dnId, boolean isDomain) {
private synchronized Peer getInternal(DatanodeID dnId, boolean isDomain) {
List<Value> sockStreamList = multimap.get(new Key(dnId, isDomain));
- if (sockStreamList == null) {
+ if (sockStreamList.isEmpty()) {
return null;
Review Comment:
Thanks @ayushtkn for your comment.
Update PR, please help me review it again, thanks~
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