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https://issues.apache.org/jira/browse/FLINK-10578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jiayi Liao updated FLINK-10578:
-------------------------------
    Description: 
I can see that now we support queryable state, why don't we also support the 
writable state? I've already done this on our own business to initialize the 
state in window during the program's first run. I think other companies may 
have other needs to modify the state from outside the job.

The synchronization is a problem but from my perspective, very few objects will 
be affected because we can directly operate on the stateTable(for the 
FsStateBackend), and about the performance, I think it'll be okay if users know 
about it.

I'm not very aware of what will be affected except what I said above, please 
let me know more if anyone has doubt about this.

  was:
I can see that now we support queryable state, why don't we also support the 
writable state? I've already done this on our own business to initialize the 
state in window during the program's first run. I think other companies may 
have other needs to modify the state from outside the job.

The synchronization is a problem and 


> Support writable state in QueryableStateClient
> ----------------------------------------------
>
>                 Key: FLINK-10578
>                 URL: https://issues.apache.org/jira/browse/FLINK-10578
>             Project: Flink
>          Issue Type: New Feature
>            Reporter: Jiayi Liao
>            Assignee: Jiayi Liao
>            Priority: Major
>
> I can see that now we support queryable state, why don't we also support the 
> writable state? I've already done this on our own business to initialize the 
> state in window during the program's first run. I think other companies may 
> have other needs to modify the state from outside the job.
> The synchronization is a problem but from my perspective, very few objects 
> will be affected because we can directly operate on the stateTable(for the 
> FsStateBackend), and about the performance, I think it'll be okay if users 
> know about it.
> I'm not very aware of what will be affected except what I said above, please 
> let me know more if anyone has doubt about this.



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