Calling Session.connection() generates java.lang.IllegalArgumentException: interface org.hibernate.jdbc.ConnectionWrapper is not visible from class loader
Description
Calling Session.connection() always generates an exception. Here is the stacktrace I get from the attached test case: Exception in thread "main" 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:56) 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 TestSession.main(TestSession.java:16)
Changing the Connection.class.getClassLoader() to BorrowedConnectionProxy.class.getClassLoader() on line 57 in the generateProxy() method solves the problem. I am not very familiar with class loaders so I don't know if this is likeley to cause other problems elsewhere. Removing the ConnectionWrapper.class from the PROXY_INTERFACES array in the org.hibernate.jdbc.BorrowedConnectionProxy also solves the problem, but I guess it was added for a reason.
I'm using Spring JMX in my application and am running into the same issue. I tried the workaround of setting "exposeManagedResourceClassLoader" property to "true" (which is the default value in 2.5.3) but that did not seem to help.
I'm wondering if there is anything else I need to do in order to get the workaround working.
thanks,
Jasper RosenbergJune 13, 2007 at 4:40 PM
For folks seeing this issue via Spring JMX, I successfully tested one of Juergen's suggested workarounds which was to set MBeanExporter's "exposeManagedResourceClassLoader" property to "true"
Calling Session.connection() always generates an exception. Here is the stacktrace I get from the attached test case:
Exception in thread "main" 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:56)
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 TestSession.main(TestSession.java:16)
Changing the Connection.class.getClassLoader() to BorrowedConnectionProxy.class.getClassLoader() on line 57 in the generateProxy() method solves the problem. I am not very familiar with class loaders so I don't know if this is likeley to cause other problems elsewhere. Removing the ConnectionWrapper.class from the PROXY_INTERFACES array in the org.hibernate.jdbc.BorrowedConnectionProxy also solves the problem, but I guess it was added for a reason.