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Posted to issues@flink.apache.org by "Chesnay Schepler (JIRA)" <ji...@apache.org> on 2015/09/16 20:26:45 UTC
[jira] [Commented] (FLINK-2690) CsvInputFormat cannot find the
field of derived POJO class
[ https://issues.apache.org/jira/browse/FLINK-2690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14790869#comment-14790869 ]
Chesnay Schepler commented on FLINK-2690:
-----------------------------------------
It appears that FLINK-2684 collides with this issue, it proposes making TypeInformation not serializable.
> CsvInputFormat cannot find the field of derived POJO class
> ----------------------------------------------------------
>
> Key: FLINK-2690
> URL: https://issues.apache.org/jira/browse/FLINK-2690
> Project: Flink
> Issue Type: Bug
> Components: Java API, Scala API
> Affects Versions: 0.10
> Reporter: Chiwan Park
> Assignee: Chiwan Park
>
> A user reports {{CsvInputFormat}} cannot find the field of derived POJO class. (http://mail-archives.apache.org/mod_mbox/flink-user/201509.mbox/%3cCAJ54yvi6CbLdN7cYpey+xe8a5A_J1-6Tnx1wm1Eb63gVnQd16w@mail.gmail.com%3e)
> The reason of the bug is that {{CsvInputFormat}} uses {{getDeclaredField}} method without scanning base classes to find the field. When {{CsvInputFormat}} was wrote, {{TypeInformation}} cannot be serialized. So we needed to initialize {{TypeInformation}} in {{open}} method manually. Some mistakes in initializing cause this bug.
> After FLINK-2637 is merged, we can serialize {{TypeInformation}} and don't need to create field objects in {{CsvInputFormat}}.
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