[jira] [Commented] (IGNITE-21765) Java thin 3.0: DataStreamer partition awareness might break if assignment is not available at the moment

["Igor Sapego (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-21765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17833127#comment-17833127 ] 

Igor Sapego commented on IGNITE-21765:
--------------------------------------

Looks good to me.

> Java thin 3.0: DataStreamer partition awareness might break if assignment is not available at the moment
> --------------------------------------------------------------------------------------------------------
>
>                 Key: IGNITE-21765
>                 URL: https://issues.apache.org/jira/browse/IGNITE-21765
>             Project: Ignite
>          Issue Type: Bug
>          Components: streaming, thin client
>    Affects Versions: 3.0.0-beta1
>            Reporter: Pavel Tupitsyn
>            Assignee: Pavel Tupitsyn
>            Priority: Major
>              Labels: ignite-3
>             Fix For: 3.0.0-beta2
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> * *ClientTable.getPartitionAssignment* might return an empty list
> * *AbstractClientStreamerPartitionAwarenessProvider* assumes that partition count can't change
> Therefore, if some server node lags behind and returns an empty assignment for a given timestamp, streamer partition awareness won't work at all.
> *Potential Fixes*
> * Wait for assignment on the server, do not return empty/null - might affect performance
> * Return correct partition count, but null values - faster and simpler



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