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https://issues.apache.org/jira/browse/OPENJPA-2399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13710372#comment-13710372
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garpinc commented on OPENJPA-2399:
----------------------------------
Ok I've found exactly where openjpa operates differently in JDK 1.6 and JDK 1.7
Either:
1) jdk 1.7 has a bug OR
2) openjpa utilized functionality that was in 1.6 but was a bug fix in 1.7 and
hence openjpa can not depend on the previous behavior
Here is the stack trace in 1.6 where ClassCircularityError is raised and later
caught in PCClassFileTransformer.needsEnhance as a Linkage error on line 207
(trunk):
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner at localhost:53304
Thread [main] (Suspended (breakpoint at line 36 in LinkageError))
owns: Launcher$AppClassLoader (id=1166)
ClassCircularityError(LinkageError).<init>(String) line: 36
ClassCircularityError.<init>(String) line: 32
Class<T>.forName0(String, boolean, ClassLoader) line: not
available [native method]
Class<T>.forName(String, boolean, ClassLoader) line: 249
TemporaryClassLoader.loadClass(String, boolean) line: 78
TemporaryClassLoader.loadClass(String) line: 44
Class<T>.forName0(String, boolean, ClassLoader) line: not
available [native method]
Class<T>.forName(String, boolean, ClassLoader) line: 249
PCClassFileTransformer.needsEnhance(String, Class, byte[])
line: 198
PCClassFileTransformer.transform0(String, Class, byte[]) line:
139
PCClassFileTransformer.transform(ClassLoader, String, Class,
ProtectionDomain, byte[]) line: 126
TransformerManager.transform(ClassLoader, String, Class,
ProtectionDomain, byte[]) line: 169
InstrumentationImpl.transform(ClassLoader, String, Class,
ProtectionDomain, byte[], boolean) line: 365
ClassLoader.defineClass1(String, byte[], int, int,
ProtectionDomain, String, boolean) line: not available [native method]
In JDK 1.7 the error is not raised and hence not caught and if you step into
the forName0 you'll instead end up a the following stack position:
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner at localhost:53419
Thread [main] (Suspended)
owns: Object (id=4827)
String.lastIndexOf(int) line: 1591
Launcher$AppClassLoader.loadClass(String, boolean) line: 301
Launcher$AppClassLoader(ClassLoader).loadClass(String) line:
357
Class<T>.forName0(String, boolean, ClassLoader) line: not
available [native method]
Class<T>.forName(String, boolean, ClassLoader) line: 270
TemporaryClassLoader.loadClass(String, boolean) line: 78
TemporaryClassLoader.loadClass(String) line: 44
Class<T>.forName0(String, boolean, ClassLoader) line: not
available [native method]
Class<T>.forName(String, boolean, ClassLoader) line: 270
PCClassFileTransformer.needsEnhance(String, Class, byte[])
line: 198
PCClassFileTransformer.transform0(String, Class, byte[]) line:
139
PCClassFileTransformer.transform(ClassLoader, String, Class,
ProtectionDomain, byte[]) line: 126
TransformerManager.transform(ClassLoader, String, Class,
ProtectionDomain, byte[]) line: 188
InstrumentationImpl.transform(ClassLoader, String, Class,
ProtectionDomain, byte[], boolean) line: 424
ClassLoader.defineClass1(String, byte[], int, int,
ProtectionDomain, String) line: not available [native method]
> Oracle JDK 1.7 seems to be causing an issue with OpenJPA
> --------------------------------------------------------
>
> Key: OPENJPA-2399
> URL: https://issues.apache.org/jira/browse/OPENJPA-2399
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.2.0, 2.3.0, 2.2.2
> Reporter: garpinc
>
> I recently had to upgrade to JDK 1.7 and I'm having
> java.lang.LinkageError: loader (instance of
> sun/misc/Launcher$AppClassLoader): attempted duplicate class definition for
> name: "org/apache/openjpa/jdbc/identifier/DBIdentifier$DBIdentifierType"
> I previously reported this sometime ago here:
> http://openjpa.208410.n2.nabble.com/JDK-1-7-seems-to-be-causing-an-issue-with-latest-snapshot-td7581417.html#a7583248
> seems there has been no resolution. I've tried 2.2.0, 2.2.1 and
> 2.3.0-SNAPSHOT and all have same issue on Oracle JDK 1.7. Can someone please
> advise?
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