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https://issues.apache.org/jira/browse/IGNITE-21098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17798489#comment-17798489
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Sergey Chugunov commented on IGNITE-21098:
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[~rpuch] , patch looks good to me, I merged it to main branch. Thank you for 
contribution!

> Increase additional wait after DDL by MaxClockSkew
> --------------------------------------------------
>
>                 Key: IGNITE-21098
>                 URL: https://issues.apache.org/jira/browse/IGNITE-21098
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Roman Puchkovskiy
>            Assignee: Roman Puchkovskiy
>            Priority: Major
>              Labels: ignite-3
>             Fix For: 3.0.0-beta2
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> When executing an RO transaction, readTimestamp has to be determined. If 
> MaxObservableTimestamp is not available (which is currently true after a 
> DDL), then TxManagerImpl takes readTimestamp as HLC.now() - 
> idleSafeTimePropagationPeriod - MaxClockSkew.
> In IGNITE-20668, an additional wait after a DDL operation was added to make 
> sure that a readTimestamp calculated in this way does not look before the DDL 
> (otherwise, the RO would see the previous schema). But in IGNITE-20668, only 
> idleSafeTimePropagationPeriod was added after a DDL, and MaxClockSkew 
> component was forgotten.
> We must add MaxClockSkew to the wait.



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