I'm seeing the same issue as this one <http://apache-ignite-users.70518.x6.nabble.com/Help-needed-with-BinaryObjectException-td22938.html> .
I had values in the cache. I cleared the cache, but did not shutdown the cluster node. I modified the enums in the class. Then I repopulated the cache with instances of the updated class. There must be some way to purge leftover metadata without bringing the cluster down, right? Can it be purged when the cache is cleared? Thanks