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https://issues.apache.org/jira/browse/HDFS-13749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16622350#comment-16622350
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Chao Sun commented on HDFS-13749:
---------------------------------

[~xkrogen]: could you take another look at this? The test 
{{TestBlockReaderLocal}} seems flaky as it succeeded on my local laptop. 
There's one check style error which I'm not sure what to do. IMO the  "}) {" 
indent style should be valid. Let me know your suggestion. 

> Use getServiceStatus to discover observer namenodes
> ---------------------------------------------------
>
>                 Key: HDFS-13749
>                 URL: https://issues.apache.org/jira/browse/HDFS-13749
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Chao Sun
>            Assignee: Chao Sun
>            Priority: Major
>         Attachments: HDFS-13749-HDFS-12943.000.patch, 
> HDFS-13749-HDFS-12943.001.patch, HDFS-13749-HDFS-12943.002.patch, 
> HDFS-13749-HDFS-12943.003.patch, HDFS-13749-HDFS-12943.004.patch, 
> HDFS-13749-HDFS-12943.005.patch
>
>
> In HDFS-12976 currently we discover NameNode state by calling 
> {{reportBadBlocks}} as a temporary solution. Here, we'll properly implement 
> this by using {{HAServiceProtocol#getServiceStatus}}.



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