java – 为什么从app引擎数据存储中获取MakePersistentAll中的De

伙计们 – 我得到以下异常,无法解释原因.要保留的对象数通常很小(<10),但是当使用persistencemanager中的makepersistentall时,我会间歇性地获得DeadlineExceededException. http请求代码还在makepersistentall调用之前处理对数据存储区的其他查询.查看异常跟踪,看起来有一些相关的东西等待对象. 问题是什么,如何解决此异常？谢谢 ==== 相关的代码是

// handle the updates
  List<InterestQueueItem> interested = getInterestedUsers(locx,locy,gamecode);  // this also results in a query into the datastore,which looks like it goes well
  List <BingoUpdate> topersisteUpdates = new ArrayList<BingoUpdate>();
     try {
   for (InterestQueueItem item: interested) {
    if (!item.getUID().equals(this.uid)) {   // no need to update the originator of the update
     BingoUpdate update = new BingoUpdate(item,screenname+" not working");
     update.setContent("some content");
     topersisteUpdates.add(update);
    }
   }
   pm.makePersistentAll(topersisteUpdates); // exception thrown here
     } finally {
      pm.close();
     }

BingoUpdate构造函数没有做太多 – 只是getter和setter.

GetInterestedUsers是

public static List<InterestQueueItem> getInterestedUsers(float locx,float locy,String gamecode) {
List<InterestQueueItem> retVal = new ArrayList<InterestQueueItem>();
    PersistenceManager pm = PMF.get().getPersistenceManager();
Query query = pm.newQuery(InterestQueueItem.class);
    try {
        // reduce the potential set of interested folks
        query.setFilter("gamecode == thisGameCode");
        query.declareParameters("String thisGameCode");                 
        retVal.addAll((List <InterestQueueItem>) query.execute(gamecode));
        return retVal;
    } finally {
        pm.close();
    }
}

例外情况如下：

Uncaught exception from servlet
com.google.apphosting.api.DeadlineExceededException: This request (61c89aa7e7f35f42) started at 2010/10/26 03:56:13.421 UTC and was still executing at 2010/10/26 03:56:42.750 UTC.
 at java.lang.Object.wait(Native Method)
 at java.lang.Object.wait(Object.java:502)
 at com.google.apphosting.runtime.AsyncFuture.get(AsyncFuture.java:54)
 at com.google.apphosting.runtime.ApiProxyImpl$AsyncApiFuture.get(ApiProxyImpl.java:412)
 at com.google.apphosting.runtime.ApiProxyImpl$AsyncApiFuture.get(ApiProxyImpl.java:244)
 at com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:42)
 at com.google.appengine.api.datastore.FutureHelper$CumulativeAggregateFuture.get(FutureHelper.java:136)
 at com.google.appengine.api.datastore.FutureHelper.getInternal(FutureHelper.java:71)
 at com.google.appengine.api.datastore.FutureHelper.quietGet(FutureHelper.java:32)
 at com.google.appengine.api.datastore.DatastoreServiceImpl$2.runInternal(DatastoreServiceImpl.java:115)
 at com.google.appengine.api.datastore.DatastoreServiceImpl$2.runInternal(DatastoreServiceImpl.java:112)
 at com.google.appengine.api.datastore.TransactionRunner.runInTransaction(TransactionRunner.java:31)
 at com.google.appengine.api.datastore.DatastoreServiceImpl.put(DatastoreServiceImpl.java:112)
 at org.datanucleus.store.appengine.RuntimeExceptionWrappingDatastoreService.put(RuntimeExceptionWrappingDatastoreService.java:117)
 at org.datanucleus.store.appengine.DatastorePersistenceHandler.put(DatastorePersistenceHandler.java:182)
 at org.datanucleus.store.appengine.DatastorePersistenceHandler.put(DatastorePersistenceHandler.java:127)
 at org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObjects(DatastorePersistenceHandler.java:254)
 at org.datanucleus.store.appengine.BatchPutManager.processBatchState(BatchPutManager.java:35)
 at org.datanucleus.store.appengine.BatchManager.finish(BatchManager.java:54)
 at org.datanucleus.store.appengine.jdo.DatastoreJDOPersistenceManager$BatchManagerWrapper.call(DatastoreJDOPersistenceManager.java:127)
 at org.datanucleus.store.appengine.jdo.DatastoreJDOPersistenceManager$BatchManagerWrapper.access$200(DatastoreJDOPersistenceManager.java:121)
 at org.datanucleus.store.appengine.jdo.DatastoreJDOPersistenceManager.makePersistentAll(DatastoreJDOPersistenceManager.java:98)
 at com.goodconcierge.UpdateQueueThread.run(UpdateQueueThread.java:112)
 at com.goodconcierge.BingoServerServlet.handleLeave(BingoServerServlet.java:92)
 at com.goodconcierge.BingoServerServlet.doGet(BingoServerServlet.java:24)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
 at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
 at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:97)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
 at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
 at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
 at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
 at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
 at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
 at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
 at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
 at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:238)
 at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
 at org.mortbay.jetty.Server.handle(Server.java:326)
 at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
 at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
 at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
 at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
 at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:135)
 at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:261)
 at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:8486)
 at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:8484)
 at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24)
 at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:418)
 at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:572)
 at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:448)
 at com.google.tracing.TraceContext.runInContext(TraceContext.java:688)
 at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:326)
 at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:318)
 at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:446)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
 at java.lang.Thread.run(Thread.java:636)