[jira] Resolved: (OPENJPA-256) java.lang.ClassNotFoundException: org.apache.openjpa.util.CacheMap in a jetty spring environment

["Marc Prud'hommeaux (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OPENJPA-256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marc Prud'hommeaux resolved OPENJPA-256.
----------------------------------------

       Resolution: Fixed
    Fix Version/s: 1.0.0

The QueryCompilationCacheValue class differs from most plugins in that th
e plugin type is the standard java interface Map.class (rather than an openjpa-s
pecific interface), which means that the ClassLoader used to load the implementa
tion will be the system class loader; this presents a problem if OpenJPA is not
in the system classpath, so work around the problem by catching the IllegalArgum
entException (which is what we wrap the ClassNotFoundException in) and try again.

This is fixed as of revision 562011. The only workaround of earlier versions of OpenJPA is to set the "openjpa.QueryCompilationCache" property to "none" (thereby disabling the query compilation cache).

> java.lang.ClassNotFoundException: org.apache.openjpa.util.CacheMap in a jetty spring environment
> ------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-256
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-256
>             Project: OpenJPA
>          Issue Type: Bug
>         Environment: jetty 6.1.3 jdk 1.5 spring 2.0.5 openjpa 1.0.0-SNAPSHOT maven 2.0.5 
>            Reporter: Bernd Bohmann
>             Fix For: 1.0.0
>
>         Attachments: OPENJPA-256.error.log
>
>
> Get a ClassNotFoundException: org.apache.openjpa.util.CacheMap.
> I think the java.util.Map in Line 1405 
> queryCompilationCachePlugin.instantiate(Map.class, this); 
> of OpenJPAConfigurationImpl cause the error.
> The classloader in this enviroment is a sun.misc.Launcher$AppClassLoader for java.util.Map not a WebAppClassLoader.
> Changing the Map.class to CacheMap.class solves the problem (the right ClassLoader is used)

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