Hi Diego, It seems that your error is related to different class Loaders being used.
I don't have an idea why this happens but please try to clean your "work" directory in Ignite home (IGNITE_HOME) after 1.8 -> 2.3 upgrade or set up a new IGNITE_HOME. Please share you node configs and IgniteFetchItem class if you still face the issue. Thank you, Alexey -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
