[OPENJPA-640] ClassNotFoundException for InstrumentationFactory upon startup

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.0.2, 1.1.0, 1.2.0
• Fix Version/s: 2.0.0-beta3
• Component/s: kernel
• Environment: JDK6, 1.2.0-trunk
• Assignee: Richard G. Curtis
• Reporter: Mingfai Ma
• Created: 23/Jun/08 10:41
• Updated: 16/Jul/10 19:40
• Resolved: 16/Jul/10 19:40

Description

This problem exists for a long time and it affects more than other people as well. Refer to an old thread in the mail list.
http://mail-archives.apache.org/mod_mbox/openjpa-users/200801.mbox/[e-mail]%3E

java.lang.ClassNotFoundException: org.apache.openjpa.enhance.InstrumentationFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:280)
at sun.instrument.InstrumentationImpl.loadClassAndCallAgentmain(InstrumentationImpl.java:348)

Previously, I had an old trick to patch the org.apache.openjpa.enhance.InstrumentationFactory.jar to include the InstrumentationFactory but it doesn't work now.

Remarks: the problem is merely about displaying a piece of stacktrace but there is no actual impact to the OpenJPA function. (that's why I marked the priority as minor.)

Issue Links

• is related to: OPENJPA-1410 Class linkage exception when creating an EMF with OpenJPA M3