As an example, reduce this number to 10 or even 5: https://github.com/apache/predictionio-template-recommender/blob/develop/engine.json#L15
On Mon, Jun 11, 2018 at 1:35 PM KRISH MEHTA <[email protected]> wrote: > Hi I am using MyRecommendation Template. What do you suggest me doing? > > On Jun 11, 2018, at 1:33 PM, Donald Szeto <[email protected]> wrote: > > Which template are you using? This is usually caused by too many > iterations on a single machine. The parameter is usually called > `numIterations` in `engine.json`. > > Regards, > Donald > > On Mon, Jun 11, 2018 at 10:22 AM KRISH MEHTA <[email protected]> > wrote: > >> When I am running Pio train I am encountering the error given below. I am >> new to PredictionIO so pardon me if the question is too mundane. >> >> [ERROR] [Executor] Exception in task 7.0 in stage 47.0 (TID 287) >> [ERROR] [Executor] Exception in task 0.0 in stage 47.0 (TID 280) >> [ERROR] [Executor] Exception in task 1.0 in stage 47.0 (TID 281) >> [ERROR] [Executor] Exception in task 4.0 in stage 47.0 (TID 284) >> [ERROR] [Executor] Exception in task 5.0 in stage 47.0 (TID 285) >> [ERROR] [Executor] Exception in task 2.0 in stage 47.0 (TID 282) >> [ERROR] [Executor] Exception in task 3.0 in stage 47.0 (TID 283) >> [ERROR] [Executor] Exception in task 6.0 in stage 47.0 (TID 286) >> [ERROR] [SparkUncaughtExceptionHandler] Uncaught exception in thread >> Thread[Executor task launch worker for task 283,5,main] >> [ERROR] [SparkUncaughtExceptionHandler] Uncaught exception in thread >> Thread[Executor task launch worker for task 282,5,main] >> [WARN] [TaskSetManager] Lost task 1.0 in stage 47.0 (TID 281, localhost, >> executor driver): java.lang.StackOverflowError >> at >> java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2624) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1321) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) >> at >> scala.collection.immutable.List$SerializationProxy.readObject(List.scala:479) >> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:498) >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058) >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909) >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808) >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018) >> >
