org.hibernate.DuplicateMappingException: Duplicate class/entity mapping project

[Ed]

I had this error
org.hibernate.DuplicateMappingException: Duplicate class/entity mapping project.hibernate.User
and I was searching on Internet about that. It appears because there is 2 persistent class with the same name. my question is:
Is it count the extension ? because the classes that I used the same name are
User.java y User.hbm.xml.
Thanks

[Jack]

You surely have two User.hbm.xml in the classpath,
check it

[bbq]

User.java and User.hbm.xml are different
check if User.hbm.xml has the same attributes that User.java has.
Maybe you forgot some attribute

[xtps225]

我的属性一样也出现这个错误了！！！！！

[jorgwel]

I had this problem. Check out the last two posts of this URL

mapping file not found: .hbm.xml

those were the solution for me.