Here is the back trace: https://gist.github.com/ 56af4818bcf5dee6b97c248fd9233c 67 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,MattOn Tue, Dec 20, 2016 at 6:46 AM, Stephan Ewen <[hidden email]> 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 <[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.NullPointerExceptionThe 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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