Gabor Somogyi commented on SPARK-28367:

It has been turned out new API from Kafka side is needed for the clean 
solution. The discussion has been initiated. I'm actively tracking the progress 
and intended to create a new PR when it's available.

> Kafka connector infinite wait because metadata never updated
> ------------------------------------------------------------
>                 Key: SPARK-28367
>                 URL: https://issues.apache.org/jira/browse/SPARK-28367
>             Project: Spark
>          Issue Type: Bug
>          Components: Structured Streaming
>    Affects Versions: 2.1.3, 2.2.3, 2.3.3, 3.0.0, 2.4.3
>            Reporter: Gabor Somogyi
>            Priority: Critical
> Spark uses an old and deprecated API named poll(long) which never returns and 
> stays in live lock if metadata is not updated (for instance when broker 
> disappears at consumer creation).
> I've created a small standalone application to test it and the alternatives: 
> https://github.com/gaborgsomogyi/kafka-get-assignment

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