Hibernate version: 2.1.6

Name and version of the database you are using:MySql 4.1.8

Do we really need to set serialVersionUID like below:

private static final long serialVersionUID = 3258409538872161584L;

in the persistant class with Serializable implementation?

regards,
prettyhandling

No idea what you want, but no.

It's not a Hibernate requirement at least.

Check this out:
http://www.javaworld.com/javaworld/java ... thser.html

http://java.sun.com/j2se/1.4.2/docs/gui ... tml#wp4100

so is it required/better to put serialVersionUID ?

No, I don't really care what it is since I've no problems without it.

serialVersionUID is for managing different versions of a serialized class.

So, it is only relevant when you *serialize* classes (which hibernate only does when you actually save the complete object in e.g. a binary).

Then it only comes relevant if you want to ensure compability between previously saved instances and newer instances with possibly new fields.

So, the answer is: If you use serialization (note: serialization != persistens) with on objects which serialized structure might change in the future - then yes, serialversionui is worth setting....but please read the serialization docs for which this is relevant (with or without hibernate)

Bloch's effective java item 55

regards