Chao Sun created HDFS-14250:
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Summary: [Standby Reads] msync should sync with active NameNode to
fetch the latest stateID
Key: HDFS-14250
URL: https://issues.apache.org/jira/browse/HDFS-14250
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Chao Sun
Assignee: Chao Sun
Currently the {{msync}} call is a dummy operation to observer without really
syncing. Instead, it should:
# Get the latest stateID from active NN.
# Use the stateID to talk to observer NN and make sure it is synced.
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