Re: Serializing NULLs

Posted by Stephan Ewen on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/Serializing-NULLs-tp10700p10702.html

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 <[hidden email]> 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