[jira] [Created] (HDFS-13962) Add null check for add-replica pool to avoid lock acquiring

["Yiqun Lin (JIRA)" <ji...@apache.org>]

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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