Fengnan Li created HDFS-16436:
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Summary: RBF: CheckSafeMode before Read Operation
Key: HDFS-16436
URL: https://issues.apache.org/jira/browse/HDFS-16436
Project: Hadoop HDFS
Issue Type: Improvement
Components: rbf
Reporter: Fengnan Li
Assignee: Fengnan Li
In Router's
[checkOperation|https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java#L630]
call, the READ operation check is before safemode check. This has one issue
where in the case of Mount Table Unavailable, READ can still pass the check
while Router can not get the correct path location.
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