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Date: Tue, 16 Dec 2014 17:21:22 -0700
From: "Trenton D. Adams" <trent@trentonadams.ca>
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To: users@openjpa.apache.org
Subject: ClassCastException on maven enhancing
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Good day,

I have a maven build.  When I run "mvn install" my unit tests run just 
fine, as does the enhancer...
[INFO] --- openjpa-maven-plugin:1.1:enhance (enhancer) @ webdirectory ---
66  athome  INFO   [main] openjpa.Tool - Enhancer running on type 
"ca.tnt.athome.Town".
190  athome  INFO   [main] openjpa.Tool - Enhancer running on type 
"ca.tnt.athome.HouseListing".

But, when I run "mvn install tomcat:deploy", the enhancer plugin tries 
to run again, and this...

[INFO] --- openjpa-maven-plugin:1.1:enhance (enhancer) @ webdirectory ---
An error occurred while attempting to determine the version of 
"file:/home/trenta/LocalDocuments/development/java/athome/web-directory/target/classes/META-INF/persistence.xml".
[INFO] 
------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] 
------------------------------------------------------------------------
[INFO] Total time: 9.535 s
[INFO] Finished at: 2014-12-16T17:18:11-07:00
[INFO] Final Memory: 13M/218M
[INFO] 
------------------------------------------------------------------------
[ERROR] Failed to execute goal 
org.codehaus.mojo:openjpa-maven-plugin:1.1:enhance (enhancer) on project 
webdirectory: Execution enhancer of goal 
org.codehaus.mojo:openjpa-maven-plugin:1.1:enhance failed: 
org.apache.openjpa.persistence.PersistenceProductDerivation:java.lang.ClassCastException: 
org.apache.xerces.parsers.XML11Configuration cannot be cast to 
org.apache.xerces.xni.parser.XMLParserConfiguration -> [Help 1]

I've been googling, and trying to debug this for awhile, and just don't 
know what it is.  Any ideas?

Maven plugin configuration below.

       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>openjpa-maven-plugin</artifactId>
         <version>1.1</version>
         <configuration>
           <includes>**/entities/*.class</includes>
           <excludes>**/entities/XML*.class</excludes>
<addDefaultConstructor>true</addDefaultConstructor>
<enforcePropertyRestrictions>true</enforcePropertyRestrictions>
         </configuration>
         <executions>
           <execution>
             <id>enhancer</id>
             <phase>process-classes</phase>
             <goals>
               <goal>enhance</goal>
             </goals>
           </execution>
         </executions>
         <dependencies>
           <dependency>
             <groupId>org.apache.openjpa</groupId>
             <artifactId>openjpa-all</artifactId>
             <version>2.3.0</version>
           </dependency>
         </dependencies>
       </plugin>