The method org.jgroups.stack.RouterStub#receive(org.jgroups.Address, byte[], int, int) swallows any exception reading the data while org.jgroups.stack.RouterStub#receive(org.jgroups.Address, java.io.DataInput) throws an exception. The exception closes the connection, which causes unnecessary (I suppose) view changes.

Make both receive methods behave the same way.