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https://issues.apache.org/jira/browse/FLINK-19207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dalongliu updated FLINK-19207:
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    Description: In Minibatch Group Agg support state ttl , we are using TTL 
State refactor group Agg function state expiration implement instead of Timer 
way. However, there’s a slight problem which 
AggregateITCase#testListAggWithRetraction test failed because of 
IteratorWithCleanup didn't support remove element, so maybe we need to support 
{{remove}} for {{TtlListState#IteratorWithCleanup.}}  (was: In [Minibatch Group 
Agg support state ttl |https://issues.apache.org/jira/browse/FLINK-17096], we 
are using TTL State refactor group Agg function state expiration implement 
instead of Timer way. However, there’s a slight problem which 
AggregateITCase#testListAggWithRetraction test failed because  )

> TtlListState#IteratorWithCleanup support remove method
> ------------------------------------------------------
>
>                 Key: FLINK-19207
>                 URL: https://issues.apache.org/jira/browse/FLINK-19207
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / State Backends
>    Affects Versions: 1.12.0
>            Reporter: dalongliu
>            Priority: Critical
>
> In Minibatch Group Agg support state ttl , we are using TTL State refactor 
> group Agg function state expiration implement instead of Timer way. However, 
> there’s a slight problem which AggregateITCase#testListAggWithRetraction test 
> failed because of IteratorWithCleanup didn't support remove element, so maybe 
> we need to support {{remove}} for {{TtlListState#IteratorWithCleanup.}}



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