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https://issues.apache.org/jira/browse/HDFS-16452?focusedWorklogId=748228&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-748228
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ASF GitHub Bot logged work on HDFS-16452:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 26/Mar/22 15:44
            Start Date: 26/Mar/22 15:44
    Worklog Time Spent: 10m 
      Work Description: hfutatzhanghb commented on pull request #3976:
URL: https://github.com/apache/hadoop/pull/3976#issuecomment-1079719195


   > hi, @xkrogen . So sorry for disturbing you. I have a new idea about what 
we have discussed. In practice, We usually plan some machines as Observer 
Namenode before setup cluster. Can we add a configuration entry in 
hdfs-site.xml to specify the nnid of Observer namenode ? After doing so, when 
we initialize failoverProxy, we can aovid adding observer namenodes to the 
proxies list. I am looking forward to your reply. Thx a lot.
   
   hi,@xkrogen,  could you please help me look at this problem? thanks a lot.


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 748228)
    Time Spent: 3h  (was: 2h 50m)

> msync RPC  should send to Acitve Namenode directly
> --------------------------------------------------
>
>                 Key: HDFS-16452
>                 URL: https://issues.apache.org/jira/browse/HDFS-16452
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namanode
>    Affects Versions: 3.3.1
>            Reporter: zhanghaobo
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 3h
>  Remaining Estimate: 0h
>
> In current ObserverReadProxyProvider implementation,   we use the following 
> code to  invoke msync RPC.
> {code:java}
> getProxyAsClientProtocol(failoverProxy.getProxy().proxy).msync(); {code}
> But msync RPC maybe send to Observer NameNode in this way, and then failover 
> to Active NameNode.   This can be avoid by applying this patch. 



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