[Hibernate-issues] [Hibernate-JIRA] Commented: (HB-506) Non-deterministic? failure of generated proxies

[<leg...@at...>]

The following comment has been added to this issue:

     Author: Max Rydahl Andersen
    Created: Fri, 28 Nov 2003 8:11 AM
       Body:
From the FAQ at http://www.hibernate.org/119.html:

Unit Testing
I get a ClassCastException when I try to call Hibernate from inside JUnit.

Fix 1 (Gareth Cronin)

Anyone using log4j/commons and JUnit should change the junit/runner/excluded.properties file inside junit.jar to look like this (it will get rid of all annoying Jakarta issues): 

excluded.0=sun.* 
excluded.1=com.sun.* 
excluded.2=org.omg.* 
excluded.3=javax.* 
excluded.4=sunw.* 
excluded.5=java.* 
excluded.6=org.xml.sax.* 
excluded.7=org.w3c.dom.* 
excluded.8=org.apache.log4j.* 
excluded.9=org.apache.commons.*

Fix 2 (Eric Everman)

Another fix for this is to turn off class reloading in JUnit.



Your problem is commons-log, not hibernate.
And your solution about shortcutting the threadcontextclassloader will for sure mess up every library that uses reflection.
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Here is an overview of the issue:
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        Key: HB-506
    Summary: Non-deterministic? failure of generated proxies
       Type: Bug

     Status: Closed
   Priority: Major
 Resolution: REJECTED

    Project: Hibernate2
   Fix Fors:
             2.1 rc1
   Versions:
             2.0.3

   Assignee: 
   Reporter: Panagiotis Louridas

    Created: Fri, 28 Nov 2003 3:59 AM
    Updated: Fri, 28 Nov 2003 8:11 AM
Environment: redhat linux 9, j2se 1.4.2 (build 1.4.2-b28), postgres, hibernate 2.0.3

Description:
Suppose we have a class hierarchy A <- B, A <- C. Both class B and C have a method getX(). Suppose, moreover, that we have a class R that contains a reference to A.

If we do a query on class R and then a query on class B or C, we *sometimes* get a ClassCastException for the generated proxy when we try to call getX(). In my environment, the same test case succeeds or fails upon repeated execution.



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