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Posted to issues@flink.apache.org by "Weijie Guo (Jira)" <ji...@apache.org> on 2024/10/11 02:08:00 UTC

[jira] [Assigned] (FLINK-36423) RichMapPartitionFunction does not invoke the open method in the KeyedPartitionWindowedStream

     [ https://issues.apache.org/jira/browse/FLINK-36423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Weijie Guo reassigned FLINK-36423:
----------------------------------

    Assignee: xuhuang

> RichMapPartitionFunction does not invoke the open method in the KeyedPartitionWindowedStream
> --------------------------------------------------------------------------------------------
>
>                 Key: FLINK-36423
>                 URL: https://issues.apache.org/jira/browse/FLINK-36423
>             Project: Flink
>          Issue Type: Bug
>            Reporter: xuhuang
>            Assignee: xuhuang
>            Priority: Minor
>              Labels: pull-request-available
>
> In cases like the one below, the {{open}} method of the RichMapPartitionFunction not be called, which can lead to unexpected errors such as Null Pointer Error.
>  
> source.keyBy(xxxx).fullWindowPartition().mapPartition(
>     new RichMapPartition(xxxx) {
>         public void open(context){        
>             // some init operations, like object creation    
>         }
>  
>         public void mapPartition(xxxx){        
>             // actual computation logical    
>         }
>     }
> )



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