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https://issues.apache.org/jira/browse/HDFS-17889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jian Zhang resolved HDFS-17889.
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Resolution: Fixed
> RBF: Enable the router asynchronous RPC feature to handle getHAServiceState
> ---------------------------------------------------------------------------
>
> Key: HDFS-17889
> URL: https://issues.apache.org/jira/browse/HDFS-17889
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Dimas Shidqi Parikesit
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2026-03-11-10-37-25-298.png,
> image-2026-03-11-10-39-49-796.png, image-2026-03-11-10-40-32-003.png
>
>
> When I tried to run getHAServiceState against a router RPC endpoint, I got an
> error that says return value is null. My proposed fix addresses this issue by
> implementing the function in RouterAsyncClientProtocol.java
> ======
> Client code:
> !image-2026-03-11-10-37-25-298.png|width=398,height=355!
>
> ======
> Error (before proposed patch):
> !image-2026-03-11-10-39-49-796.png|width=783,height=337!
>
> ======
> Expected behavior (after proposed patch):
> !image-2026-03-11-10-40-32-003.png|width=741,height=62!
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