Hello!

I've got problems compiling dao-jpa-ojpa-derby.

1). I've set failonerror="true" in build.xml in gen-schemas. I didn't
even notice this error earlier.

2). Build fails with following error message:

[EMAIL PROTECTED]:~/stuff/school/java/ode/ode/dao-jpa-ojpa-derby $ mvn -e 
install
+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] 
----------------------------------------------------------------------------
[INFO] Building ODE :: OpenJPA DAO Impl Using Derby
[INFO]    task-segment: [install]
[INFO] 
----------------------------------------------------------------------------
[INFO] [antrun:run {execution: OpenJPA Schema Gen}]
[INFO] Executing tasks

gen-schemas:
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error executing ant tasks

Embedded error: The following error occurred while executing this line:
/home/maciej/stuff/school/java/ode/ode/dao-jpa-ojpa-derby/build.xml:96:
java.util.MissingResourceException:
org.apache.openjpa.persistence.PersistenceProductDerivation:javax.xml.parsers.FactoryConfigurationError:
Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Error
executing ant tasks
       at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:564)
       at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:480)
       at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:459)
       at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:311)
       at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:278)
       at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
       at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:334)
       at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:125)
       at org.apache.maven.cli.MavenCli.main(MavenCli.java:272)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
       at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
       at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
       at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: Error
executing ant tasks
       at 
org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:77)
       at org.apache.maven.plugin.antrun.AntRunMojo.execute(AntRunMojo.java:72)
       at 
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:443)
       at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539)
       ... 16 more
Caused by: The following error occurred while executing this line:
/home/maciej/stuff/school/java/ode/ode/dao-jpa-ojpa-derby/build.xml:96:
java.util.MissingResourceException:
org.apache.openjpa.persistence.PersistenceProductDerivation:javax.xml.parsers.FactoryConfigurationError:
Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
       at 
org.apache.tools.ant.ProjectHelper.addLocationToBuildException(ProjectHelper.java:539)
       at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:384)
       at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
       at org.apache.tools.ant.Task.perform(Task.java:364)
       at org.apache.tools.ant.Target.execute(Target.java:341)
       at 
org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:71)
       ... 19 more
Caused by: 
/home/maciej/stuff/school/java/ode/ode/dao-jpa-ojpa-derby/build.xml:96:
java.util.MissingResourceException:
org.apache.openjpa.persistence.PersistenceProductDerivation:javax.xml.parsers.FactoryConfigurationError:
Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
       at 
org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:180)
       at org.apache.tools.ant.taskdefs.Java.run(Java.java:710)
       at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:178)
       at org.apache.tools.ant.taskdefs.Java.execute(Java.java:84)
       at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
       at org.apache.tools.ant.Task.perform(Task.java:364)
       at org.apache.tools.ant.Target.execute(Target.java:341)
       at org.apache.tools.ant.Target.performTasks(Target.java:369)
       at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
       at 
org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:37)
       at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
       at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:382)
       ... 23 more
Caused by: java.util.MissingResourceException:
org.apache.openjpa.persistence.PersistenceProductDerivation:javax.xml.parsers.FactoryConfigurationError:
Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
       at 
org.apache.openjpa.lib.conf.ProductDerivations.reportErrors(ProductDerivations.java:323)
       at 
org.apache.openjpa.lib.conf.ProductDerivations.load(ProductDerivations.java:271)
       at 
org.apache.openjpa.lib.conf.Configurations.populateConfiguration(Configurations.java:280)
       at org.apache.openjpa.jdbc.meta.MappingTool.run(MappingTool.java:964)
       at org.apache.openjpa.jdbc.meta.MappingTool.main(MappingTool.java:915)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.apache.tools.ant.taskdefs.ExecuteJava.run(ExecuteJava.java:202)
       at 
org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:134)
       ... 34 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7 seconds
[INFO] Finished at: Sat Apr 14 19:43:03 CEST 2007
[INFO] Final Memory: 8M/14M
[INFO] ------------------------------------------------------------------------




Do you have any idea what might be causing this? I've researched this
for a while, but don't know how to fix it (or even what's the nature
of the problem).


Regards
Maciej

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