He Xiaoqiao created HADOOP-15345:
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Summary: Backport HADOOP-12185 to branch-2.7: NetworkTopology is
not efficient adding/getting/removing nodes
Key: HADOOP-15345
URL: https://issues.apache.org/jira/browse/HADOOP-15345
Project: Hadoop Common
Issue Type: Improvement
Reporter: He Xiaoqiao
As per discussion in HADOOP-15343 backport HADOOP-12185 to branch-2.7
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