ClassCastException caused when Hibernate caches instance under user provided key -------------------------------------------------------------------------------- Key: HHH-2321 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2321 Project: Hibernate3 Type: Bug Components: core Versions: 3.2.0 cr1 Environment: Hibernate 3.2.0.CR1, MySQL 4.0.18 Reporter: Dmitri Colebatch Priority: Trivial I haven't looked into this in detail, but am pretty confident that my reading of this is correct. I'm trying to interface into bugzilla's database and have used the tools to generate some classes for use. I'm just mocking something up and so have the following code snippet: Product product = (Product) session.load(Product.class, 1); // .... Bug bug = new Bug(); // ... bug.setProduct(product); // ... // tx.commit(); On the commit I get the following error: Exception in thread "main" java.lang.ClassCastException: java.lang.Integer at org.hibernate.type.ShortType.set(ShortType.java:40) at org.hibernate.type.NullableType.nullSafeSet(NullableType.java:83) at org.hibernate.type.NullableType.nullSafeSet(NullableType.java:60) at org.hibernate.type.ManyToOneType.nullSafeSet(ManyToOneType.java:71) Now if I change Product product = (Product) session.load(Product.class, 1); to Product product = (Product) session.load(Product.class, (short) 1); It all works fine. I'm assuming what's happening is that Hibernate is using the user provided key, which in the first scenario is an Integer, as the primary key and hence getting the CCE. My guess is that hibernate should be more pedantic about not trusting user provided values. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira