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https://issues.apache.org/jira/browse/FLINK-28053?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-28053:
-----------------------------------
    Labels: pull-request-available  (was: )

> Introduce queue to execute request in sequence
> ----------------------------------------------
>
>                 Key: FLINK-28053
>                 URL: https://issues.apache.org/jira/browse/FLINK-28053
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / Gateway
>    Affects Versions: 1.16.0
>            Reporter: Shengkai Fang
>            Assignee: Shengkai Fang
>            Priority: Major
>              Labels: pull-request-available
>
> There are two kinds of the parallel we need to consider:
> 1. The parallel among all the operations for the same session. For example, 
> the user may submit a SQL to create a table and modify another table's schema 
> in parallel.
> 2. The parallel is also mainly about the Operation itself. It is possible 
> that one thread is reading the data from the Operation and another one closes 
> the Operation in parallel. 
> We may introduce the queue to make these requests execute in sequence. It 
> brings the benefit that simplifying the logic in the Operation and 
> OperationManager and moving all locks to the handover. But it may cause a 
> performance regression. Therefore, it's better if we can start this issue 
> until all components finish.



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