ClassCastException whlile accessing custom object in Geode's Function.execute() method - geode

Question

I am adding the custom object(Account) into Cache and then trying to access the object in the Function.execute() method.
But it throws org.apache.geode.pdx.internal.PdxInstanceImpl cannot be cast to com.sas.cpm.model.Account.
Custom object Account.java
public class Account implements PdxSerializable, Declarable{
public Account() {
super();
// TODO Auto-generated constructor
}
#Override
public void fromData(PdxReader pr) {…..}
#Override
public void toData(PdxWriter pw) {… }
}
Client code:
ClientCache cache = new ClientCacheFactory()
.addPoolLocator("localhost", 10334).set("log-level", "INFO").create();
// create a local region that matches the server region
// Account is the domain object
Region<String, Account> region =
cache.<String, Account>createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY)
.create("testRegion");
feedData(region); //add Account object to region
Execution execution = FunctionService.onRegion(region);
ResultCollector<Integer, List> rc = execution.execute("UpdateCost");//.ID);//com.sas.cpm.geode
Function class : UpdateCost.java
public class UpdateCost implements Function{
#Override
public void execute(FunctionContext context) {
RegionFunctionContext regionContext = (RegionFunctionContext) context;
Region<String, Account> region = regionContext.getDataSet();
for ( Map.Entry<String, Account> entry : region.entrySet() ) {
Account account = entry.getValue(); /// THIS LINE GIVES THE ERROR
}
}
}
Error:
Exception in thread "main" org.apache.geode.cache.execute.FunctionException: org.apache.geode.cache.client.ServerOperationException: remote server on dsinsbb01ina4(46560:loner):59343:2f7e3885: While performing a remote executeRegionFunction
at org.apache.geode.internal.cache.execute.ServerRegionFunctionExecutor.executeOnServer(ServerRegionFunctionExecutor.java:229)
at org.apache.geode.internal.cache.execute.ServerRegionFunctionExecutor.executeFunction(ServerRegionFunctionExecutor.java:178)
at org.apache.geode.internal.cache.execute.ServerRegionFunctionExecutor.execute(ServerRegionFunctionExecutor.java:379)
at geodeproject1.Example.funcUpdateExec(Example.java:186)
at geodeproject1.Example.main(Example.java:68)
Caused by: org.apache.geode.cache.client.ServerOperationException: remote server on dsinsbb01ina4(46560:loner):59343:2f7e3885: While performing a remote executeRegionFunction
at org.apache.geode.cache.client.internal.ExecuteRegionFunctionOp$ExecuteRegionFunctionOpImpl.processResponse(ExecuteRegionFunctionOp.java:606)
at org.apache.geode.cache.client.internal.AbstractOp.processResponse(AbstractOp.java:225)
at org.apache.geode.cache.client.internal.AbstractOp.attemptReadResponse(AbstractOp.java:198)
at org.apache.geode.cache.client.internal.AbstractOp.attempt(AbstractOp.java:386)
at org.apache.geode.cache.client.internal.ConnectionImpl.execute(ConnectionImpl.java:269)
at org.apache.geode.cache.client.internal.pooling.PooledConnection.execute(PooledConnection.java:325)
at org.apache.geode.cache.client.internal.OpExecutorImpl.executeWithPossibleReAuthentication(OpExecutorImpl.java:892)
at org.apache.geode.cache.client.internal.OpExecutorImpl.execute(OpExecutorImpl.java:171)
at org.apache.geode.cache.client.internal.PoolImpl.execute(PoolImpl.java:772)
at org.apache.geode.cache.client.internal.ExecuteRegionFunctionOp.execute(ExecuteRegionFunctionOp.java:162)
at org.apache.geode.cache.client.internal.ServerRegionProxy.executeFunction(ServerRegionProxy.java:732)
at org.apache.geode.internal.cache.execute.ServerRegionFunctionExecutor.executeOnServer(ServerRegionFunctionExecutor.java:220)
... 4 more
Caused by: org.apache.geode.cache.execute.FunctionException: java.lang.ClassCastException: org.apache.geode.pdx.internal.PdxInstanceImpl cannot be cast to com.sas.cpm.model.Account
at org.apache.geode.cache.client.internal.ExecuteRegionFunctionOp$ExecuteRegionFunctionOpImpl.processResponse(ExecuteRegionFunctionOp.java:583)
... 15 more
Caused by: java.lang.ClassCastException: org.apache.geode.pdx.internal.PdxInstanceImpl cannot be cast to com.sas.cpm.model.Account
at com.sas.cpm.geode.UpdateCost.execute(UpdateCost.java:49)
at org.apache.geode.internal.cache.execute.AbstractExecution.executeFunctionLocally(AbstractExecution.java:331)
at org.apache.geode.internal.cache.execute.AbstractExecution$2.run(AbstractExecution.java:300)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.geode.distributed.internal.ClusterDistributionManager.runUntilShutdown(ClusterDistributionManager.java:949)
at org.apache.geode.distributed.internal.ClusterDistributionManager.doFunctionExecutionThread(ClusterDistributionManager.java:803)
at org.apache.geode.internal.logging.LoggingThreadFactory.lambda$newThread$0(LoggingThreadFactory.java:121)
at java.lang.Thread.run(Unknown Source)

Answer 1

The ClassCastException is thrown because you're receiving a PdxInstance from the cache instead of an Account, this happens when you implement the PdxSerializable interface in your domain object and configure PDX Serialization with read-serialized=true.
Please have a look at Implementing PdxSerializable in Your Domain Object and Programming Your Application to Use PdxInstances for further details.
Cheers.