Yiqun Lin created HDFS-13962:
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Summary: Add null check for add-replica pool to avoid lock
acquiring
Key: HDFS-13962
URL: https://issues.apache.org/jira/browse/HDFS-13962
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 3.1.1
Reporter: Yiqun Lin
This is a follow-up work for HDFS-13768. Mainly two places needed to update:
* Add null check for add-replica pool to avoid lock acquiring
* In {{ReplicaMap#addAndGet}}, it would be better to use
{{FoldedTreeSet#addOrReplace}} instead of {{FoldedTreeSet#add}} for adding
replica info.
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