[jira] [Comment Edited] (HDFS-13522) HDFS-13522: Add federated nameservices states to client protocol and propagate it between routers and clients.

["Simbarashe Dzinamarira (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-13522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17654691#comment-17654691 ] 

Simbarashe Dzinamarira edited comment on HDFS-13522 at 1/5/23 1:18 AM:
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Hi [~tasanuma]. We haven't backported HDFS-13522 and HDFS-16767 to the 3.x line yet. There were large merge conflicts so we deferred the work.

So far, only HDFS-16669 and HADOOP-18406 have been backported.


was (Author: simbadzina):
Hi [~tasanuma]. We haven't backported HDFS-13522 and HDFS-16767 to the 3.x line yet. There were large merge conflicts so we deferred the work.



So far, only HDFS-16669 and HDFS-18406 have been backported.

> HDFS-13522: Add federated nameservices states to client protocol and propagate it between routers and clients.
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-13522
>                 URL: https://issues.apache.org/jira/browse/HDFS-13522
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: federation, namenode
>            Reporter: Erik Krogen
>            Assignee: Simbarashe Dzinamarira
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.4.0, 3.3.5
>
>         Attachments: HDFS-13522.001.patch, HDFS-13522.002.patch, HDFS-13522_WIP.patch, RBF_ Observer support.pdf, Router+Observer RPC clogging.png, ShortTerm-Routers+Observer.png, observer_reads_in_rbf_proposal_simbadzina_v1.pdf, observer_reads_in_rbf_proposal_simbadzina_v2.pdf
>
>          Time Spent: 20h 50m
>  Remaining Estimate: 0h
>
> Changes will need to occur to the router to support the new observer node.
> One such change will be to make the router understand the observer state, e.g. {{{}FederationNamenodeServiceState{}}}.
> This patch captures the state of all namespaces in the routers and propagates it to clients. A follow up patch will change router behavior to direct requests to the observer.
>  
>  



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