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

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-26600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HIVE-26600:
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    Labels: pull-request-available  (was: )

> 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: 10m
>  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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