Vaadin 8. Stateful session.

Vaadin 6 / 7 / 8
1

Hi

I am trying to make the session as stateful. Unfortunately, in restoring I get a serialization error on the GridDragSource Vaadin class.

org.apache.coyote.http11.Http11Processor.service Error processing request
        java.lang.ClassCastException: cannot assign instance of java.lang.invoke.SerializedLambda to field com.vaadin.ui.components.grid.Gri
dDragSource.dragDataGenerator of type com.vaadin.data.provider.DataGenerator in instance of com.vaadin.ui.components.grid.GridDragSource
                at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2133)
                at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1305)
                at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2251)
[skip]
2

I think I found the reason for this, see the linked pull request

https://github.com/vaadin/framework/pull/12137

3

Thank you.

4

The pull request was included to the latest 8.12.1 release.

5

This is splendid! Thanks.