Junping Du created HDFS-5208:
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Summary: Only clear network location cache on specific nodes if
invalid NetworkTopology happens
Key: HDFS-5208
URL: https://issues.apache.org/jira/browse/HDFS-5208
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Junping Du
Assignee: Junping Du
After HDFS-4521, once a DN is registered with invalid networktopology, all
cached rack info in DNSToSwitchMapping will be cleared. We should only clear
cache on specific nodes.
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