[jira] [Assigned] (FLINK-16220) JsonRowSerializationSchema throws cast exception : NullNode cannot be cast to ArrayNode

["Jark Wu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-16220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jark Wu reassigned FLINK-16220:
-------------------------------

    Assignee: Benchao Li

> JsonRowSerializationSchema throws cast exception : NullNode cannot be cast to ArrayNode
> ---------------------------------------------------------------------------------------
>
>                 Key: FLINK-16220
>                 URL: https://issues.apache.org/jira/browse/FLINK-16220
>             Project: Flink
>          Issue Type: Bug
>          Components: Formats (JSON, Avro, Parquet, ORC, SequenceFile)
>            Reporter: Benchao Li
>            Assignee: Benchao Li
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> It's because the object reuse. For the below schema:
> {code:java}
> create table sink {
>   col1 int,
>   col2 array<int>
> }{code}
> if col2 is null, then the reused object will be {{NullNode}}. for the next record, if it's not null, we will cast the reused object {{NullNode}} to {{ArrayNode}}, which will throw cast exception.
>  
> cc [~jark] [~twalthr] 



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