Re: [appengine-java] Not allowed to access system class loader.
Is this preventing your task from running? This is generally a harmless exception. Here's another thread on the subject, though your stack trace is a bit different: http://groups.google.com/group/google-appengine-java/browse_thread/thread/e01814b8ceaf3e59/b340b4de766e09fb?lnk=gstq=FinalizableReferenceQueue+app+engine#b340b4de766e09fb On Tue, Jan 26, 2010 at 5:02 PM, ravi guntuku ravikumar.gunt...@gmail.comwrote: A simple servlet which reads some data from a table - and query analytics service and store data in another table. When i run this servlet from browser it works (always). I have scheduled this servlet to run as cron job and it is not working at all. And i see the below exception in App engine logs. 01-26 04:36PM 45.184 com.google.appengine.repackaged.com.google.common.base.FinalizableReferenceQueue $SystemLoader loadFinalizer: Not allowed to access system class loader. I 01-26 04:36PM 45.197 com.google.appengine.repackaged.com.google.common.base.internal.Finalizer getInheritableThreadLocalsField: Couldn't access Thread.inheritableThreadLocals. Reference finalizer threads will inherit thread local values. I 01-26 04:36PM 45.201 com.google.appengine.repackaged.com.google.common.base.FinalizableReferenceQueue init: Failed to start reference finalizer thread. Reference cleanup will only occur when new references are created. java.lang.reflect.InvocationTargetException at com.google.appengine.runtime.Request.process-51100059fa394f2b (Request.java) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Method.java:42) at com.google.appengine.repackaged.com.google.common.base.FinalizableReferenceQueue.init (FinalizableReferenceQueue.java:124) at com.google.appengine.repackaged.com.google.common.labs.misc.InterningPools $WeakInterningPool.clinit(InterningPools.java:104) at com.google.appengine.repackaged.com.google.common.labs.misc.InterningPools.newWeakInterningPool (InterningPools.java:48) at com.google.appengine.repackaged.com.google.io.protocol.ProtocolSupport.clinit (ProtocolSupport.java:55) at com.google.apphosting.api.DatastorePb$Query.init (DatastorePb.java:1072) at com.google.apphosting.api.DatastorePb$Query$1.init (DatastorePb.java:2529) at com.google.apphosting.api.DatastorePb$Query.clinit (DatastorePb.java:2529) at com.google.appengine.api.datastore.QueryTranslator.convertToPb (QueryTranslator.java:28) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl.convertToPb(DatastoreServiceImpl.java:424) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl.runQuery(DatastoreServiceImpl.java:384) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl.asQueryResultIterator(DatastoreServiceImpl.java: 358) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl$2.iterator(DatastoreServiceImpl.java:338) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl$2.iterator(DatastoreServiceImpl.java:336) at org.datanucleus.store.appengine.query.RuntimeExceptionWrappingIterable.iterator (RuntimeExceptionWrappingIterable.java:42) at org.datanucleus.store.appengine.query.LazyResult.init (LazyResult.java:67) at org.datanucleus.store.appengine.query.StreamingQueryResult.init (StreamingQueryResult.java:63) at org.datanucleus.store.appengine.query.DatastoreQuery.newStreamingQueryResultForEntities (DatastoreQuery.java:399) at org.datanucleus.store.appengine.query.DatastoreQuery.wrapEntityQueryResult (DatastoreQuery.java:372) at org.datanucleus.store.appengine.query.DatastoreQuery.fulfillEntityQuery (DatastoreQuery.java:364) at org.datanucleus.store.appengine.query.DatastoreQuery.executeQuery (DatastoreQuery.java:265) at org.datanucleus.store.appengine.query.DatastoreQuery.performExecute (DatastoreQuery.java:228) at org.datanucleus.store.appengine.query.JDOQLQuery.performExecute (JDOQLQuery.java:85) at org.datanucleus.store.query.Query.executeQuery(Query.java:1489) at org.datanucleus.store.query.Query.executeWithArray(Query.java: 1371) at org.datanucleus.store.query.Query.execute(Query.java:1344) at org.datanucleus.jdo.JDOQuery.execute(JDOQuery.java:221) at sample.data.SaveGoogleData.saveData(SaveGoogleData.java:53) at sample.controller.DataStoreServlet.doGet(DataStoreServlet.java:21) 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)
[appengine-java] Not allowed to access system class loader.
A simple servlet which reads some data from a table - and query analytics service and store data in another table. When i run this servlet from browser it works (always). I have scheduled this servlet to run as cron job and it is not working at all. And i see the below exception in App engine logs. 01-26 04:36PM 45.184 com.google.appengine.repackaged.com.google.common.base.FinalizableReferenceQueue $SystemLoader loadFinalizer: Not allowed to access system class loader. I 01-26 04:36PM 45.197 com.google.appengine.repackaged.com.google.common.base.internal.Finalizer getInheritableThreadLocalsField: Couldn't access Thread.inheritableThreadLocals. Reference finalizer threads will inherit thread local values. I 01-26 04:36PM 45.201 com.google.appengine.repackaged.com.google.common.base.FinalizableReferenceQueue init: Failed to start reference finalizer thread. Reference cleanup will only occur when new references are created. java.lang.reflect.InvocationTargetException at com.google.appengine.runtime.Request.process-51100059fa394f2b (Request.java) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Method.java:42) at com.google.appengine.repackaged.com.google.common.base.FinalizableReferenceQueue.init (FinalizableReferenceQueue.java:124) at com.google.appengine.repackaged.com.google.common.labs.misc.InterningPools $WeakInterningPool.clinit(InterningPools.java:104) at com.google.appengine.repackaged.com.google.common.labs.misc.InterningPools.newWeakInterningPool (InterningPools.java:48) at com.google.appengine.repackaged.com.google.io.protocol.ProtocolSupport.clinit (ProtocolSupport.java:55) at com.google.apphosting.api.DatastorePb$Query.init (DatastorePb.java:1072) at com.google.apphosting.api.DatastorePb$Query$1.init (DatastorePb.java:2529) at com.google.apphosting.api.DatastorePb$Query.clinit (DatastorePb.java:2529) at com.google.appengine.api.datastore.QueryTranslator.convertToPb (QueryTranslator.java:28) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl.convertToPb(DatastoreServiceImpl.java:424) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl.runQuery(DatastoreServiceImpl.java:384) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl.asQueryResultIterator(DatastoreServiceImpl.java: 358) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl$2.iterator(DatastoreServiceImpl.java:338) at com.google.appengine.api.datastore.DatastoreServiceImpl $PreparedQueryImpl$2.iterator(DatastoreServiceImpl.java:336) at org.datanucleus.store.appengine.query.RuntimeExceptionWrappingIterable.iterator (RuntimeExceptionWrappingIterable.java:42) at org.datanucleus.store.appengine.query.LazyResult.init (LazyResult.java:67) at org.datanucleus.store.appengine.query.StreamingQueryResult.init (StreamingQueryResult.java:63) at org.datanucleus.store.appengine.query.DatastoreQuery.newStreamingQueryResultForEntities (DatastoreQuery.java:399) at org.datanucleus.store.appengine.query.DatastoreQuery.wrapEntityQueryResult (DatastoreQuery.java:372) at org.datanucleus.store.appengine.query.DatastoreQuery.fulfillEntityQuery (DatastoreQuery.java:364) at org.datanucleus.store.appengine.query.DatastoreQuery.executeQuery (DatastoreQuery.java:265) at org.datanucleus.store.appengine.query.DatastoreQuery.performExecute (DatastoreQuery.java:228) at org.datanucleus.store.appengine.query.JDOQLQuery.performExecute (JDOQLQuery.java:85) at org.datanucleus.store.query.Query.executeQuery(Query.java:1489) at org.datanucleus.store.query.Query.executeWithArray(Query.java: 1371) at org.datanucleus.store.query.Query.execute(Query.java:1344) at org.datanucleus.jdo.JDOQuery.execute(JDOQuery.java:221) at sample.data.SaveGoogleData.saveData(SaveGoogleData.java:53) at sample.controller.DataStoreServlet.doGet(DataStoreServlet.java:21) at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: 487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1093) at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter (ParseBlobUploadFilter.java:97) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1084) at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter (SaveSessionFilter.java:35) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter