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From Stephan Ewen <se...@apache.org>
Subject Re: Serializing NULLs
Date Tue, 20 Dec 2016 16:17:43 GMT
Thanks for sharing the stack trace.

This seems not really Flink related, it is part of the specific Avro
encoding logic.
The Avro Generic Record Type apparently does not allow the map value to be
null.



On Tue, Dec 20, 2016 at 4:55 PM, Matt <dromitlabs@gmail.com> wrote:

> Here is the back trace: https://gist.github.com/
> 56af4818bcf5dee6b97c248fd9233c67
>
> In the meanwhile I've solved the issue by creating a POJO class where null
> is just Long.MIN_VALUE, that with a custom equals() made the trick. I guess
> it's not as fast as de/serializing Double though.
>
> If you need any other information let me know.
>
> Regards,
> Matt
>
> On Tue, Dec 20, 2016 at 6:46 AM, Stephan Ewen <sewen@apache.org> wrote:
>
>> The "null" support in some types is not fully developed. However in that
>> case I am wondering why it does not work. Can you share the stack trace, so
>> we can take a look at the serializer?
>>
>>
>>
>> On Mon, Dec 19, 2016 at 9:56 PM, Matt <dromitlabs@gmail.com> wrote:
>>
>>> Hello list,
>>>
>>> I'm getting this error:
>>>
>>>
>>> *java.lang.RuntimeException: Could not forward element to next operator*
>>> *...*
>>> *Caused by: java.lang.NullPointerException: in com.entities.Sector in
>>> map in double null of double of map in field properties of
>>> com.entities.Sector*
>>> *...*
>>> *Caused by: java.lang.NullPointerException*
>>>
>>> The field mentioned is a HashMap<String, Double>, and some keys are
>>> mapped to null values.
>>>
>>> Why isn't it possible to forward/serialize those elements with null
>>> values?
>>> What do you do when your elements may contain nulls?
>>>
>>> Regards,
>>> Matt
>>>
>>
>>
>

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