MessageBodyWriter not found for media type=application/json

[tal181]

Hi,
I am using this library : https://github.com/zapr-oss/druidry to send queries to druid.
While on my machine everything works, I am getting this error when trying to run it with lambda

MessageBodyWriter not found for media type=application/json, type=class in.zapr.druid.druidry.query.aggregation.DruidGroupByQuery, genericType=class in.zapr.druid.druidry.query.aggregation.DruidGroupByQuery.

15:41:38
15:41:38.581 [main] ERROR in.zapr.druid.druidry.client.DruidJerseyClient - Exception while querying {}

Any idea what can cause it ?
Thanks,
Tal

[tal181]

I have solved the issue by adding : to maven-shade-plugin