[jira] [Updated] (FLINK-22389) Expose Message Batches to SDKs

["Flink Jira Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-22389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Flink Jira Bot updated FLINK-22389:
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    Labels: auto-unassigned stale-major  (was: auto-unassigned)

I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help the community manage its development. I see this issues has been marked as Major but is unassigned and neither itself nor its Sub-Tasks have been updated for 60 days. I have gone ahead and added a "stale-major" to the issue". If this ticket is a Major, please either assign yourself or give an update. Afterwards, please remove the label or in 7 days the issue will be deprioritized.


> Expose Message Batches to SDKs
> ------------------------------
>
>                 Key: FLINK-22389
>                 URL: https://issues.apache.org/jira/browse/FLINK-22389
>             Project: Flink
>          Issue Type: New Feature
>          Components: Stateful Functions
>            Reporter: Konstantin Knauf
>            Priority: Major
>              Labels: auto-unassigned, stale-major
>
> Stateful Functions always invokes a functions with a batch of messages. Under normal operations the batch size=1 (no batching). 
> If a function is slow and backpressure arises, the batch size grows, though. From an SDK perspective, this batching is not visible. The function is always invoked with a single message. This makes it impossible to efficiently evaluate the whole batch at once (e.g. with pandas). 
> This issue was requested in http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Flink-Statefun-Python-Batch-tp43022.html. 



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