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Posted to dev@flink.apache.org by Szabó Péter <ne...@gmail.com> on 2015/03/09 10:22:54 UTC

NullFieldException is thrown when testing IterativeDataStream with tuples and maxBy

I'm running the following code and getting the RuntimeException "Emit
failed due to: org.apache.flink.types.NullFieldException: Field 0 is null,
but expected to hold a value."
https://dl.dropboxusercontent.com/u/64242132/TestExample.java

Does somebody know what causes it?
Another issue is that if the source does not sleep between emits, the
program freezes.

Peter

Re: NullFieldException is thrown when testing IterativeDataStream with tuples and maxBy

Posted by Márton Balassi <ba...@gmail.com>.

Hey,

Seems like a weird interaction between output splitting and windowing.
Could you please open a JIRA ticket for it?

Thanks,

Marton

On Mon, Mar 9, 2015 at 10:22 AM, Szabó Péter <ne...@gmail.com>
wrote:

> I'm running the following code and getting the RuntimeException "Emit
> failed due to: org.apache.flink.types.NullFieldException: Field 0 is null,
> but expected to hold a value."
> https://dl.dropboxusercontent.com/u/64242132/TestExample.java
>
> Does somebody know what causes it?
> Another issue is that if the source does not sleep between emits, the
> program freezes.
>
> Peter
>