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https://issues.apache.org/jira/browse/HDFS-5025?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jing Zhao updated HDFS-5025:
----------------------------

    Attachment: HDFS-5025.000.patch

Very initial patch just for review (based on the change in HDFS-4979). The 
patch only adds RPC clientId and callId to the editlog. Will add the 
functionality to rebuild the retry cache based on edit log in the next step.
                
> Record ClientId and CallId in EditLog to enable rebuilding retry cache in 
> case of HA failover
> ---------------------------------------------------------------------------------------------
>
>                 Key: HDFS-5025
>                 URL: https://issues.apache.org/jira/browse/HDFS-5025
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, namenode
>    Affects Versions: 3.0.0
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-5025.000.patch
>
>
> In case of HA failover, we need to be able to rebuild the retry cache in the 
> other Namenode. We thus need to record client id and call id in the edit log 
> for those "AtMostOnce" operations.

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