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From "Till Rohrmann (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-996) NullPointerException while translating union node
Date Wed, 02 Jul 2014 14:44:26 GMT

    [ https://issues.apache.org/jira/browse/FLINK-996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14049971#comment-14049971
] 

Till Rohrmann commented on FLINK-996:
-------------------------------------

To be more precise: The exception only occurs if the union is used for at least two operators
as an input.

> NullPointerException while translating union node
> -------------------------------------------------
>
>                 Key: FLINK-996
>                 URL: https://issues.apache.org/jira/browse/FLINK-996
>             Project: Flink
>          Issue Type: Bug
>            Reporter: Till Rohrmann
>            Assignee: Till Rohrmann
>
> The NepheleJobGraphGenerator throws a NullPointerException when translating a binary
union operator. The BinaryUnionPlanNode is not replaced by a NAryUnionPlanNode and thus is
still treated as a DualInputVertex. Accessing the driver code of the BinaryUnionPlanNode causes
then the NullPointerException.



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