[jira] [Closed] (FLINK-28053) Introduce queue to execute request in sequence

["Shengkai Fang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-28053?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shengkai Fang closed FLINK-28053.
---------------------------------
    Resolution: Implemented

> 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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