I added a call to flush() after every change on the PM-managed object, but that did not help.
Also doing a pm.flush() does not throw this exception, but doing a pm.close() does - which seems to be contrary to your reasoning (I would expect flush to throw the same exception if multiple entity groups were at cause). On Jun 3, 1:33 am, Millisecond <[email protected]> wrote: > Even though you're not using transactions, I think it's trying to make > the .close() call atomic (maybe with an internal implicit > transaction), failing or succeeding as a whole. And as I understand > it, entities not in the same group can be stored on separate machines > so can't be operated on atomically. > > I've worked around this by calling a flush() after most any change on > a PM-managed object until close(). If this has a huge number of reqs/ > s, you may want to re-architect to get the objects in the same entity > group as multiple flushes won't be very efficient. > > -C > > On Jun 2, 8:26 pm, JD <[email protected]> wrote: > > > I have a PersistenceManager > > > PersistenceManager pm = PMF.get().getPersistenceManager(); > > > which I use to do a bunch of operations on different objects, but > > WITHOUT transaction (run queries, store entities and lookup entities). > > > I then close the manager with pm.close() and get this obscure error > > that complains about multiple entity groups inside a transaction even > > though I am not using a transaction (you will notice that the error is > > not the usual one where it prints the different entity groups). > > > I am not 100% confident but have the impression that this error > > started happening with the 1.3.4 release. > > 100% reproducible use case. Would appreciate input from App Engine > > developers. > > > com.myapp.servlet.task.PopulateUserPages doAction: Illegal argument > > javax.jdo.JDOFatalUserException: Illegal argument > > at > > org.datanucleus.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(Nuc > > leusJDOHelper.java: > > 344) > > at > > org.datanucleus.jdo.JDOPersistenceManager.close(JDOPersistenceManager.java: > > 281) > > at com.myapp.dao.jdo.DatastoreService.release(DatastoreService.java: > > 631) > > at > > com.myapp.servlet.AbstractBaseServlet.releaseService(AbstractBaseServlet.ja > > va: > > 243) > > at > > com.myapp.servlet.task.PopulateUserPages.doAction(PopulateUserPages.java: > > 132) > > at com.myapp.servlet.task.Dispatcher.doAction(Dispatcher.java:35) > > at com.myapp.servlet.task.TaskServlet.doAction(TaskServlet.java:36) > > at > > com.myapp.servlet.AbstractBaseServlet.doGenericAction(AbstractBaseServlet.j > > ava: > > 194) > > at > > com.myapp.servlet.AbstractBaseServlet.doPost(AbstractBaseServlet.java: > > 84) > > 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.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlo > > bUploadFilter.java: > > 97) > > at org.mortbay.jetty.servlet.ServletHandler > > $CachedChain.doFilter(ServletHandler.java:1157) > > at > > com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionF > > ilter.java: > > 35) > > at org.mortbay.jetty.servlet.ServletHandler > > $CachedChain.doFilter(ServletHandler.java:1157) > > at > > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(Trans > > actionCleanupFilter.java: > > 43) > > 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.runtime.jetty.AppVersionHandlerMap.handle(AppVersionH > > andlerMap.java: > > 238) > > 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 > > $RequestHandler.headerComplete(HttpConnection.java:923) > > at > > com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequ > > estParser.java: > > 76) > > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) > > at > > com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceReques > > t(JettyServletEngineAdapter.java: > > 135) > > at > > com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java: > > 250) > > at com.google.apphosting.base.RuntimePb$EvaluationRuntime > > $6.handleBlockingRequest(RuntimePb.java:5838) > > at com.google.apphosting.base.RuntimePb$EvaluationRuntime > > $6.handleBlockingRequest(RuntimePb.java:5836) > > at > > com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingAp > > plicationHandler.java: > > 24) > > at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java: > > 398) > > at com.google.net.rpc.impl.Server$2.run(Server.java:852) > > at > > com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java: > > 56) > > at > > com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpa > > nBuilder.java: > > 576) > > at com.google.net.rpc.impl.Server.startRpc(Server.java:807) > > at com.google.net.rpc.impl.Server.processRequest(Server.java:369) > > at > > com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.j > > ava: > > 442) > > at > > com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java: > > 319) > > at > > com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java: > > 290) > > at com.google.net.async.Connection.handleReadEvent(Connection.java: > > 474) > > at > > com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.j > > ava: > > 831) > > at > > com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java: > > 207) > > at com.google.net.async.EventDispatcher.loop(EventDispatcher.java: > > 103) > > at > > com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java: > > 251) > > at com.google.apphosting.runtime.JavaRuntime > > $RpcRunnable.run(JavaRuntime.java:413) > > at java.lang.Thread.run(Unknown Source) > > NestedThrowablesStackTrace: > > java.lang.IllegalArgumentException: can't operate on multiple entity > > groups in a single transaction. > > at > > com.google.appengine.api.datastore.DatastoreApiHelper.translateError(Datast > > oreApiHelper.java: > > 34) > > at > > com.google.appengine.api.datastore.DatastoreApiHelper.makeSyncCall(Datastor > > eApiHelper.java: > > 67) > > at com.google.appengine.api.datastore.DatastoreServiceImpl > > $1.run(DatastoreServiceImpl.java:128) > > at > > com.google.appengine.api.datastore.TransactionRunner.runInTransaction(Trans > > actionRunner.java: > > 30) > > at > > com.google.appengine.api.datastore.DatastoreServiceImpl.get(DatastoreServic > > eImpl.java: > > 111) > > at > > com.google.appengine.api.datastore.DatastoreServiceImpl.get(DatastoreServic > > eImpl.java: > > 84) > > at > > com.google.appengine.api.datastore.DatastoreServiceImpl.get(DatastoreServic > > eImpl.java: > > 72) > > at > > org.datanucleus.store.appengine.RuntimeExceptionWrappingDatastoreService.ge > > t(RuntimeExceptionWrappingDatastoreService.java: > > 63) > > at > > org.datanucleus.store.appengine.DatastorePersistenceHandler.get(DatastorePe > > rsistenceHandler.java: > > 96) > > at > > org.datanucleus.store.appengine.DatastorePersistenceHandler.get(DatastorePe > > rsistenceHandler.java: > > 106) > > at > > org.datanucleus.store.appengine.DatastorePersistenceHandler.updateObject(Da > > tastorePersistenceHandler.java: > > 530) > > at > > org.datanucleus.state.JDOStateManagerImpl.flush(JDOStateManagerImpl.java: > > 4576) > > at > > org.datanucleus.ObjectManagerImpl.flushInternal(ObjectManagerImpl.java: > > 2814) > > at org.datanucleus.ObjectManagerImpl.flush(ObjectManagerImpl.java: > > 2754) > > at > > org.datanucleus.ObjectManagerImpl.preCommit(ObjectManagerImpl.java: > > 2893) > > at > > org.datanucleus.TransactionImpl.internalPreCommit(TransactionImpl.java: > > 369) > > at org.datanucleus.TransactionImpl.commit(TransactionImpl.java:256) > > at org.datanucleus.ObjectManagerImpl.close(ObjectManagerImpl.java: > > 801) > > at > > org.datanucleus.jdo.JDOPersistenceManager.close(JDOPersistenceManager.java: > > 271) > > at com.myapp.dao.jdo.DatastoreService.release(DatastoreService.java: > > 631) > > at > > com.myapp.servlet.AbstractBaseServlet.releaseService(AbstractBaseServlet.ja > > va: > > 243) > > at > > com.myapp.servlet.task.PopulateUserPages.doAction(PopulateUserPages.java: > > 132) > > at com.myapp.servlet.task.Dispatcher.doAction(Dispatcher.java:35) > > at com.myapp.servlet.task.TaskServlet.doAction(TaskServlet.java:36) > > at > > com.myapp.servlet.AbstractBaseServlet.doGenericAction(AbstractBaseServlet.j > > ava: > > 194) > > at > > com.myapp.servlet.AbstractBaseServlet.doPost(AbstractBaseServlet.java: > > 84) > > 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 > > ... > > read more » -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. 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