[HDFS-13687] ConfiguredFailoverProxyProvider could direct requests to SBN - ASF JIRA

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Details

Type: Bug
Status: Patch Available
Priority: Minor
Resolution: Unresolved
Affects Version/s: None
Fix Version/s: None
Component/s: None
Labels:
None

Description

In case there are multiple SBNs, and dfs.ha.allow.stale.reads is set to true, failover could go to a SBN which then may serve read requests from client. This may not be the expected behavior. This issue arises when we are working on ~~HDFS-12943~~ and ~~HDFS-12976~~.

A better approach for this could be to check HAServiceState and find out the active NN when performing failover. This also can reduce the # of failovers the client has to do in case of multiple SBNs.