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From "Guillaume Chauvet (JIRA)" <>
Subject [jira] [Commented] (OPENJPA-2430) Derby LOB persistence
Date Thu, 26 Sep 2013 14:20:02 GMT


Guillaume Chauvet commented on OPENJPA-2430:

Maybe the ticket OPENJPA-2344 can help you ?
> Derby LOB persistence
> ---------------------
>                 Key: OPENJPA-2430
>                 URL:
>             Project: OpenJPA
>          Issue Type: Improvement
>          Components: jdbc
>    Affects Versions: 2.2.2
>         Environment: Java 1.6u45 (Java 1.7 and 1.8 EA versions seemed to have issues:
> Exception in thread "main" java.lang.LinkageError: loader (instance of  sun/misc/Launcher$AppClassLoader):
attempted  duplicate class definition for name: "org/apache/openjpa/jdbc/identifier/DBIdentifier$DBIdentifierType"
>      [java] 	at java.lang.ClassLoader.defineClass1(Native Method)
>            Reporter: Dag H. Wanvik
> Derby is not listed among data bases that support LOB member fields, cf.
> The OpenJPA manual for version 2.2.2, section 7.7.11 LOB Streaming.
> See also the issue experienced by a user here:
> I found that by overloading getLobField in DerbyDictionary (effectively materializing
the LOB) I could make the user's example work. Cf. the code shown here:
> Would adding this overload be a possible way forward for the Derby support? I'm willing
to make a proper patch if so.

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