[ https://issues.apache.org/jira/browse/OPENJPA-640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12850165#action_12850165 ] 

Joseph Leong commented on OPENJPA-640:
--------------------------------------

Does this problem still exist for OpenJPA 1.2.2?  If so, is it still innocuous to OpenJPA functionality as noted by the description?
We're getting:
Exception in thread "Attachment 65390" java.lang.ClassNotFoundException: org.apache.openjpa.enhance.InstrumentationFactory
	at java.lang.ClassNotFoundException.<init>(ClassNotFoundException.java:77)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:383)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:643)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:346)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:609)
	at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:292)
	at sun.instrument.InstrumentationImpl.loadClassAndCallAgentmain(InstrumentationImpl.java:360)
	at com.ibm.tools.attach.javaSE.Attachment.loadAgentLibraryImpl(Native Method)
	at com.ibm.tools.attach.javaSE.Attachment.loadAgentLibrary(Attachment.java:253)
	at com.ibm.tools.attach.javaSE.Attachment.parseLoadAgent(Attachment.java:235)
	at com.ibm.tools.attach.javaSE.Attachment.doCommand(Attachment.java:154)
	at com.ibm.tools.attach.javaSE.Attachment.run(Attachment.java:116)
JVMJ9TI003E Agent_OnLoad failed for library instrument

Thanks!

> ClassNotFoundException for InstrumentationFactory upon startup
> --------------------------------------------------------------
>
>                 Key: OPENJPA-640
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-640
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 1.0.2, 1.1.0, 1.2.0
>         Environment: JDK6, 1.2.0-trunk
>            Reporter: Mingfai Ma
>            Priority: Minor
>
> 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/%3C478963D8.209@gmail.com%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.)

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