[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2947) NPE on initialization of Hibernate

[Jörg Heinicke (JIRA)]

NPE on initialization of Hibernate
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                 Key: HHH-2947
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2947
             Project: Hibernate3
          Issue Type: Bug
          Components: core
    Affects Versions: 3.2.5
            Reporter: Jörg Heinicke
            Priority: Minor


There seems to be a rare case when Hibernate fails with a NPE on initialization:
http://forum.springframework.org/showthread.php?t=46034

The actual stacktrace is

Caused by: java.lang.ExceptionInInitializerError
	at org.hibernate.cfg.Configuration.reset(Configuration.java:168)
	at org.hibernate.cfg.Configuration.<init>(Configuration.java:187)
	at org.hibernate.cfg.Configuration.<init>(Configuration.java:191)
	...
Caused by: java.lang.NullPointerException
	at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:144)
	at org.hibernate.cfg.Environment.<clinit>(Environment.java:524)
	... 26 more

I don't know exactly which Hibernate version the user used but there seems to be only one potential null pointer in the whole method and this is still in line 144 in the latest code:

stream = Environment.class.getClassLoader().getResourceAsStream( stripped );

Class.getClassLoader() is allowed to return null following the Java API: http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Class.html#getClassLoader().
So you might consider handling this particular case in which it can happen, when Environment.class gets loaded by the bootstrap classloader.

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