Hi all,
I have a random issue when testing my application locally. From
time to time, when I use PersistenceManager.getObjectById() I receive
the following exception:
java.lang.UnsupportedOperationException
at
org.datanucleus.store.appengine.EntityUtils.getPropertyName(EntityUtils.java:
62)
at
org.datanucleus.store.appengine.DatastoreFieldManager.getPropertyName(DatastoreFieldManager.java:
1073)
at
org.datanucleus.store.appengine.DatastoreFieldManager.fetchObjectField(DatastoreFieldManager.java:
309)
at
org.datanucleus.state.AbstractStateManager.replacingObjectField(AbstractStateManager.java:
1197)
at
org.ugr.rtpstat.server.orm.UsuarioRegistrado.jdoReplaceField(UsuarioRegistrado.java)
at
org.ugr.rtpstat.server.orm.UsuarioRegistrado.jdoReplaceFields(UsuarioRegistrado.java)
at
org.datanucleus.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java:
2772)
at
org.datanucleus.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java:
2791)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.fetchObject(DatastorePersistenceHandler.java:
466)
at
org.datanucleus.state.JDOStateManagerImpl.validate(JDOStateManagerImpl.java:
4263)
at
org.datanucleus.ObjectManagerImpl.findObject(ObjectManagerImpl.java:
2444)
at
org.datanucleus.jdo.JDOPersistenceManager.getObjectById(JDOPersistenceManager.java:
1671)
at
org.datanucleus.jdo.JDOPersistenceManager.getObjectById(JDOPersistenceManager.java:
1767)
at
org.datanucleus.store.appengine.jdo.DatastoreJDOPersistenceManager.getObjectById(DatastoreJDOPersistenceManager.java:
73)
at
org.ugr.rtpstat.server.RtpstatServiceImpl.getRegisteredUser(RtpstatServiceImpl.java:
88)
at
org.ugr.rtpstat.server.RtpstatServiceImpl.getRegisteredUser(RtpstatServiceImpl.java:
79)
at
org.ugr.rtpstat.server.RtpstatServiceImpl.isRegisteredUser(RtpstatServiceImpl.java:
204)
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:597)
at
com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:
100)
at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:
562)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:
188)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:
224)
at
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:
62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
51)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:349)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
at org.mortbay.jetty.HttpConnection
$RequestHandler.content(HttpConnection.java:938)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)
The thing is that when this happens, it happens for a while and I can
only resolve it by an undeterminate combination of cleaning the
project, cleaning the browser cache, closing the browser, login out of
the app, turning on a candle next to the computer, and more. in any
order.
Some times it starts working again after just a couple steps, another
times it persists for a while disappearing at any random moment.
Looking at the code indicated by the exception I find the following:
// If we're dealing with embeddables, the column name override
// will show up as part of the column meta data.
if (ammd.getColumnMetaData() != null &&
ammd.getColumnMetaData().length > 0) {
if (ammd.getColumnMetaData().length != 1) {
// TODO(maxr) throw something more appropriate
throw new UnsupportedOperationException();
}
return ammd.getColumnMetaData()[0].getName();
}
Can anybody explain me what's going on here?
Thanks
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