[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3529) ConnectionWrapper is not visible from class loader

ConnectionWrapper is not visible from class loader --------------------------------------------------- Key: HHH-3529 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3529 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.2.6, 3.3.1 Environment: SpringFramework 2.5.5, Hibernate 3.2.6 / 3.3.1, Tomcat 5.5, CommonJ Timer ( http://www.myfoo.de/commonj/ ) Reporter: Vladimir Kralik Attachments: hibernate-3.2.6_p2.patch Hibernate/Spring libraries are in app.war/WEB-INF/lib. Timer is configured as resources in Tomcat and his libraries are in $CATALINA_HOME/common/lib/. Function call from GUI works, but the same function called by timers gives this exception : org.springframework.transaction.CannotCreateTransactionException: Could not openHibernate Session for transaction; nested exception is java.lang.IllegalArgumentException: interface org.hibernate.jdbc.ConnectionWrapper is not visible from class loader at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:599) .... Caused by: java.lang.IllegalArgumentException: interface org.hibernate.jdbc.ConnectionWrapper is not visible from class loader at java.lang.reflect.Proxy.getProxyClass(Proxy.java:353) at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:581) at org.hibernate.jdbc.BorrowedConnectionProxy.generateProxy(BorrowedConnectionProxy.java:67) at org.hibernate.jdbc.ConnectionManager.borrowConnection(ConnectionManager.java:163) at org.hibernate.jdbc.JDBCContext.borrowConnection(JDBCContext.java:111) at org.hibernate.impl.SessionImpl.connection(SessionImpl.java:359) at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:510) It's the same bug as was in HHH-2215, but this is not resolved. I think, that the problem is extracting classloader from currentThread(). This is always not null, so the next test in method getProxyClassLoader() is always false. I my case, timer thread lives in top class loader, but hibernate libraries are inside application class loader. Attached patch removes classloader extracting from currentThread(). It works for my case.