I was able to replicate the error in the local dev environment, and
got this stack trace:
Jun 17, 2010 6:02:50 PM org.datanucleus.transaction.Transaction
rollback
SEVERE: Operation rollback failed on resource:
org.datanucleus.store.appengine.datastorexaresou...@1c95b4c, error
code UNKNOWN and transaction: [DataNucleus Transaction, ID=Xid=
enlisted
resources=[org.datanucleus.store.appengine.datastorexaresou...@1c95b4c]]
Jun 17, 2010 6:02:55 PM com.google.apphosting.utils.jetty.JettyLogger
warn
WARNING: /SaveLoc
javax.jdo.JDODataStoreException: Datastore Failure
at
org.datanucleus.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:
304)
at org.datanucleus.jdo.JDOTransaction.commit(JDOTransaction.java:
132)
at
org.datanucleus.store.appengine.jdo.DatastoreJDOTransaction.commit(DatastoreJDOTransaction.java:
56)
at omr.SaveLoc.doPost(SaveLoc.java:74)
at omr.SaveLoc.doGet(SaveLoc.java:24)
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: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.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:
212)
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)
NestedThrowablesStackTrace:
com.google.appengine.api.datastore.DatastoreFailureException: handle 1
not found
at
com.google.appengine.api.datastore.DatastoreApiHelper.translateError(DatastoreApiHelper.java:
51)
at
com.google.appengine.api.datastore.DatastoreApiHelper.makeSyncCall(DatastoreApiHelper.java:
67)
at com.google.appengine.api.datastore.DatastoreServiceImpl
$2.run(DatastoreServiceImpl.java:188)
at
com.google.appengine.api.datastore.TransactionRunner.runInTransaction(TransactionRunner.java:
30)
at
com.google.appengine.api.datastore.DatastoreServiceImpl.put(DatastoreServiceImpl.java:
176)
at
com.google.appengine.api.datastore.DatastoreServiceImpl.put(DatastoreServiceImpl.java:
156)
at
com.google.appengine.api.datastore.DatastoreServiceImpl.put(DatastoreServiceImpl.java:
152)
at
org.datanucleus.store.appengine.RuntimeExceptionWrappingDatastoreService.put(RuntimeExceptionWrappingDatastoreService.java:
105)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.put(DatastorePersistenceHandler.java:
187)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.put(DatastorePersistenceHandler.java:
139)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.put(DatastorePersistenceHandler.java:
134)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.updateObject(DatastorePersistenceHandler.java:
536)
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.jdo.JDOTransaction.commit(JDOTransaction.java:
83)
at
org.datanucleus.store.appengine.jdo.DatastoreJDOTransaction.commit(DatastoreJDOTransaction.java:
56)
at omr.SaveLoc.doPost(SaveLoc.java:74)
at omr.SaveLoc.doGet(SaveLoc.java:24)
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: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.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:
212)
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)
On Jun 16, 8:05 am, shaz <[email protected]> wrote:
> Here is the code for reference. For background, there is a class
> called OMRUser which is a user class, and there is Location3 class.
> There is a one to many owned relationship between a user and locations
>
> snippet of USER class:
>
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class OmrUser {
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> private Key key;
>
> @Persistent
> private User gaeuser;
>
> @Persistent(mappedBy = "omruser")
> @Element(dependent = "true")
> private List<Location3> userlocs;
>
> @Persistent(mappedBy = "omruser")
> @Element(dependent = "true")
> private List<Driver> userdrivers;
>
> @Persistent
> private String accounttype;
>
> snippet of Location class:
>
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class Location3 implements Comparable<Location3> {
>
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> private Key key;
>
> @Persistent
> private OmrUser omruser;
>
> snippet of servlet to save locations
>
> PersistenceManager pm = PMF.get().getPersistenceManager();
> Transaction tx = pm.currentTransaction();
> try {
> tx.begin();
>
> String select_query = "select from " +
> OmrUser.class.getName();
> Query query = pm.newQuery(select_query);
> query.setFilter("gaeuser == paramAuthor");
> query.declareParameters("java.lang.String
> paramAuthor");
>
> List<OmrUser> omruserquery = (List<OmrUser>)
> pm.newQuery(query).execute(user);
>
> if(omruserquery.iterator().hasNext()) {
> OmrUser thisomruser =
> omruserquery.iterator().next();
> if(thisomruser.getNumlocs()<MaxSaveLocs){
> thisomruser.addSingleLoc(location);
> location.setOmruser(thisomruser);
> pm.makePersistent(location);
> log.info("Adding Location to existing OMR
> User");
> } else {
> msg = "You have exceeded the maximum
> number of locations you can
> save, please delete a location first.";
> log.info("FAIL - Exceed max num locs");
> }
> } else {
> OmrUser newuser = new OmrUser(user, "Basic");
> newuser.addSingleLoc(location);
> pm.makePersistent(newuser);
> location.setOmruser(newuser);
> log.info("Created new user " +
> newuser.getGaeuser().getEmail());
> }
> tx.commit();
> } finally {
> if (tx.isActive()) {
> tx.rollback();
> }
> }
>
> On Jun 15, 9:39 pm, shaz <[email protected]> wrote:
>
> > Hi, I have a functioning app and recently have hadintermittent
> > problems writing to the datastore. I did not make any relevant code
> > changes, however in the last few days my attempts to write to the
> > datastore sometimes work and sometimes don't.
>
> > I am trying to save an object that is in a many to one relationship
> > with an existing persisted parent. So, the logic works like this:
>
> > - Parent pulled from the
> > datastore
> > - Child created / instantiated
> > using constructor
>
> > - Parent.addSingleChild(child);
> > // the "addSingleChild" method
> > just adds the object argument to the collection of children
>
> > - child.setParent(Parent); // sets
> > the Parent object to the
> > parent field
>
> > I am using transactions as explained in the documentation ending with
> > "finally {if (tx.isActive()) {tx.rollback(); } }"
>
> > When the servlet is called, the parent is called from the datastore
> > and the child object is created and added to the many to one mapping
> > to the pre-existing parent.
>
> > The child should automatically be persisted, since the parent is
> > already persistent, and the child is added to the collection of
> > children that map to the parent. And it worked this way in the
> > past. However, to be sure, i did add a pm.makePersistent(child).
> > Doesn't seem to help, still have theintermittentproblem.
>
> > Any suggestions would be appreciated, and if you need to see the
> > actual code I can post. Thanks
>
> > appid is omrtest
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