[jira] [Commented] (FLINK-17818) CSV Reader with Pojo Type and no field names fails

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

    [ https://issues.apache.org/jira/browse/FLINK-17818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17178490#comment-17178490 ] 

Zhu Zhu commented on FLINK-17818:
---------------------------------

cc [~aljoscha][~twalthr]

> CSV Reader with Pojo Type and no field names fails
> --------------------------------------------------
>
>                 Key: FLINK-17818
>                 URL: https://issues.apache.org/jira/browse/FLINK-17818
>             Project: Flink
>          Issue Type: Bug
>          Components: API / DataSet
>    Affects Versions: 1.10.1
>            Reporter: Danish Amjad
>            Priority: Minor
>   Original Estimate: 0.5h
>  Remaining Estimate: 0.5h
>
> When a file is read with a CSVReader and a POJO is specified and the filed names are not specified, the output is obviously not correct. The API is not throwing any error despite a null check inside the API. i.e.
> {code}
> Preconditions.checkNotNull(pojoFields, "POJO fields must be specified (not null) if output type is a POJO.");
> {code}
> The *root cause* of the problem is that the _fieldNames_ argument is a variable argument and the variable is 'empty but not null' when not given any value. So, the check passes without failing.
> I am not sure if it is a feature of the API or an actual bug because there is a test checking the NPE when a null is passed.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)