0003252: Resin embedded cannot find classes in WEB-INF/lib using Class.forName from the very same .jar

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Category

Severity

Reproducibility

Date Submitted

Last Update

0003252

[Resin]

major

always

01-14-09 01:30

06-18-09 15:32

Reporter

GreenEyed

View Status

public

Assigned To

ferg

Priority

normal

Resolution

unable to reproduce

Status

closed

Product Version

3.2.1

Summary

0003252: Resin embedded cannot find classes in WEB-INF/lib using Class.forName from the very same .jar

Description

When trying to load a class using Class.forName inside a class that has been loaded from WEB-INF/lib, a ClassNotFound is thrown even if the class is inside the very same .jar file of the class performing the Class.forName.

The application works fine if executed using 3.2.1 the regular way. It just happens in embedded mode.

Additional Information

Here it is an example stack trace. The class calling Class.forName (org.leaf.xml.ClassSource) is inside a .jar file located in WEB-INF/lib, and the class that is not found (org.leaf.util.ConnectionManagementHelper) is packaged in the same jar file.
*********************************************************************
WARN: java.lang.NoClassDefFoundError:
org/leaf/util/ConnectionManagementHelper$SQLAction
java.lang.NoClassDefFoundError:
org/leaf/util/ConnectionManagementHelper$SQLAction
         at java.lang.Class.forName0(Native Method)
         at java.lang.Class.forName(Unknown Source)
         at org.leaf.xml.ClassSource.getSource(ClassSource.java:134)
         at org.leaf.xml.ClassSource.getXMLSource(ClassSource.java:264)
...
Caused by: java.lang.ClassNotFoundException:
org.leaf.util.ConnectionManagementHelper$SQLAction
         at java.net.URLClassLoader$1.run(Unknown Source)
         at java.security.AccessController.doPrivileged(Native Method)
         at java.net.URLClassLoader.findClass(Unknown Source)
         at java.lang.ClassLoader.loadClass(Unknown Source)
         at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
         at java.lang.ClassLoader.loadClass(Unknown Source)
         at java.lang.ClassLoader.loadClassInternal(Unknown Source)
         ... 27 more
*********************************************************************

Attached Files

Relationships

Notes
(0004082) ferg 06-18-09 15:32	server/1e81 Checked with jar in WEB-INF/lib for ResinEmbed (launched independently), and the subclasses load correctly. From the bug report, the "NoClassDefFoundError" is a tricky JVM message. The classname in the exception isn't the problem class. The problem class is a class used by the named class. In other words, some class inside SQLAction (or ConnectionManagementHelper.) It's possible the dependent jar wasn't available to the ResinEmbed. Unfortunately, the JVM's error message doesn't tell you which actual class failed to load.

Issue History
Date Modified	Username	Field	Change
01-14-09 01:30	GreenEyed	New Issue
04-19-09 12:06	mauricev	Issue Monitored: mauricev
06-18-09 15:32	ferg	Note Added: 0004082
06-18-09 15:32	ferg	Assigned To	=> ferg
06-18-09 15:32	ferg	Status	new => closed
06-18-09 15:32	ferg	Resolution	open => unable to reproduce
06-18-09 15:32	ferg	Fixed in Version	=> 4.0.1

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