Hello,
I have a class MainConfiguration I want do be persisted. In this class
there is a property of type
@Persistent private List<List<String>> engRegKeyCustom;
If I try to search for a MainConfiguration entity or if I try to
persist one I get the following error... Is this because of my
List<List... variables ??
WARNING: Nested in java.lang.ExceptionInInitializerError:
java.lang.NullPointerException
at
org.datanucleus.store.appengine.jdo.DatastoreJDOMetaDataManager.shouldBeInDefaultFetchGroup(DatastoreJDOMetaDataManager.java:
167)
at
org.datanucleus.store.appengine.jdo.DatastoreJDOMetaDataManager.shouldBeInDefaultFetchGroup(DatastoreJDOMetaDataManager.java:
167)
at
org.datanucleus.store.appengine.jdo.DatastoreJDOMetaDataManager.populateAbstractClassMetaData(DatastoreJDOMetaDataManager.java:
153)
at
org.datanucleus.metadata.MetaDataManager.populateFileMetaData(MetaDataManager.java:
2148)
at
org.datanucleus.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:
2289)
at
org.datanucleus.jdo.metadata.JDOMetaDataManager.getMetaDataForClassInternal(JDOMetaDataManager.java:
369)
at org.datanucleus.jdo.metadata.JDOMetaDataManager
$MetaDataRegisterClassListener.registerClass(JDOMetaDataManager.java:
184)
at javax.jdo.spi.JDOImplHelper.registerClass(JDOImplHelper.java:376)
at
persistenz.entities.MainConfiguration.<clinit>(MainConfiguration.java)
at test.DefaultData.doGet(DefaultData.java:45)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1093)
at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
51)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1084)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1084)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
121)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1084)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
360)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
139)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:352)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
506)
at org.mortbay.jetty.HttpConnection
$RequestHandler.headerComplete(HttpConnection.java:830)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
396)
at org.mortbay.thread.BoundedThreadPool
$PoolThread.run(BoundedThreadPool.java:442)
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