[jira] [Work logged] (HIVE-26600) Handle failover during optimized bootstrap

Fri, 27 Jan 2023 04:32:04 -0800 


     [ 
https://issues.apache.org/jira/browse/HIVE-26600?focusedWorklogId=841991&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-841991
 ]

ASF GitHub Bot logged work on HIVE-26600:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 27/Jan/23 12:31
            Start Date: 27/Jan/23 12:31
    Worklog Time Spent: 10m 
      Work Description: sonarcloud[bot] commented on PR #3991:
URL: https://github.com/apache/hive/pull/3991#issuecomment-1406437162

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

    Worklog Id:     (was: 841991)
    Time Spent: 20m  (was: 10m)

> Handle failover during optimized bootstrap
> ------------------------------------------
>
>                 Key: HIVE-26600
>                 URL: https://issues.apache.org/jira/browse/HIVE-26600
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Teddy Choi
>            Assignee: Rakshith C
>            Priority: Blocker
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> when the reverse policy is enabled from DR to PROD, there is a situation 
> wherein the user may initiate a failover from DR to PROD before the optimized 
> bootstrap is ever run.
> Current observations:
>  * Repl Dump will place a failover ready marker but failover metadata won't 
> be generated.
>  * Repl Load will throw an error since failover will be set to true but 
> failovermetadata is missing.
> Replication fails and we reach an undefined state.
> Fix :
>  * create failover ready marker only during second cycle of optimized 
> bootstrap if possible.
>  * since some tables may need to be bootstrapped, it may take upto 3 cycles 
> before failover from DR to PROD is complete.
>  * if no tables are modified, second dump from DR to PROD will be marked as 
> failover ready.
> Result:
>  * users can initiate a failover immediately after enabling reverse policy 
> without any hassles.



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